Cell and its organelles
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The document compares and contrasts prokaryotic and eukaryotic cells, as well as animal and plant cells. Prokaryotic cells are smaller than eukaryotic cells and lack a nucleus and organelles. Eukaryotic cells have a nucleus enclosed by a nuclear membrane and contain organelles. Animal cells are generally smaller than plant cells, lack a cell wall, and have smaller vacuoles. Plant cells have a cell wall, plastids, and larger vacuoles.
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Prokaryotic cells are much smaller than eukaryotic cells, lack membrane-bound organelles, and have a single circular chromosome. In contrast, eukaryotic cells are generally larger, have membrane-bound organelles including a nucleus surrounded by a double membrane, and multiple linear or circular chromosomes. The key differences between prokaryotic and eukaryotic cells are their size, presence of membrane-bound organelles, number and structure of chromosomes.
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The cell is the basic unit of life. It contains genetic material, cytoplasm enclosed by a membrane, and various organelles that perform essential functions. Cells can be either prokaryotic (lacking organelles) or eukaryotic (containing organelles like the nucleus). The basic components of cells include the cell membrane, cytoplasm, genetic material like DNA and RNA, and organelles. These components work together to carry out life's processes.
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Eukaryotic cells contain membrane-bound organelles, including a nucleus. Eukaryotes can be single-celled or multi-celled, such as you, me, plants, fungi, and insects. Bacteria are an example of prokaryotes. Prokaryotic cells do not contain a nucleus or any other membrane-bound organelle.
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1) Passive diffusion - Lipid-soluble drugs pass directly through the membrane.
2) Facilitated diffusion - Carrier proteins transport specific molecules like glucose.
3) Active transport - Energy-dependent pumps move molecules against a concentration gradient.
Eukaryotic nucleus
Introduction to nucleus
Discovery of nucleus
Structure of nucleus
What is chromatin
Nuclear envelope
Nuclear pores
Nucleolus
The funamental unit of life
Cell is the fundamental unit of life. It is the structural and functional unit that forms the basic unit of all living organisms. There are two main types of cells - prokaryotic and eukaryotic. Prokaryotic cells like bacteria are simpler with no organelles while eukaryotic cells like plant and animal cells are more complex with membrane-bound organelles. The cell consists of a plasma membrane, cytoplasm and nucleus. Within the cytoplasm are various organelles that perform specific functions to keep the cell alive.
The funamentalunit of life
Cell is the fundamental unit of life. It is the structural and functional unit that forms the basic unit of all living organisms. There are two main types of cells - prokaryotic and eukaryotic. Prokaryotic cells like bacteria are simpler with no organelles while eukaryotic cells like plant and animal cells are more complex with membrane-bound organelles. The cell consists of a plasma membrane, cytoplasm and nucleus. Within the cytoplasm are various organelles that perform specific functions like mitochondria, chloroplasts and lysosomes.
cellclass8presentation-171210133109.pptx
This document provides information about cell structure and function in three parts:
1) It defines the cell as the basic structural and functional unit of living organisms and describes that cells arise from pre-existing cells.
2) It discusses the history of cell discovery and outlines some key cell structures like the cell membrane, cell wall, cytoplasm, nucleus, and organelles.
3) It compares key differences between prokaryotic and eukaryotic cells, plant and animal cells, and describes the levels of organization in living beings from cells to organisms. Cell growth and cell division are also briefly explained.
Ch 08 - Cell : The unit of Life || Class 11 ||
- Robert Hooke first observed cells in 1665 when examining a slice of cork under a microscope. He saw small compartments separated by walls, which he called cells.
- The Cell Theory, developed by Schleiden and Schwann, states that the cell is the basic unit of structure and function of living things, new cells arise from existing cells, and all organisms are composed of one or more cells.
- Cells come in two main types - prokaryotic cells which lack a nucleus and membrane-bound organelles, and eukaryotic cells which have a nucleus surrounded by a nuclear membrane and other membrane-bound structures.
Prokaryotic and eukaryotic cell
Prokaryotic cells like bacteria and archaea are much simpler than eukaryotic cells. They are typically smaller, lack membrane-bound organelles, have no nucleus, and have circular DNA not contained within a nucleus. In contrast, eukaryotic cells found in plants, animals and fungi are larger, have organelles like mitochondria and a nucleus that contains linear DNA. They have more complex structures that allow for specialized functions.
Biology 1 for grade 12 SHS (cell structure)
The document discusses the key scientists who contributed to cell theory and lists the three main tenets of cell theory. It also provides an overview of the major organelles found in cells like the nucleus, mitochondria, chloroplasts, lysosomes, and describes their main functions. Additionally, it compares the structure and organization of plant and animal cells and provides an analogy between the parts of a cell and that of a fictional city called Grant City.
ORGANELLE table.doc
The document describes various organelles found within plant and animal cells and provides information about their location, structure, and function. The key organelles discussed include the cell wall, cell membrane, nucleus, nucleolus, mitochondria, Golgi apparatus, vacuoles, vesicles, lysosomes, chloroplasts, and microtubules. The nucleus is described as the main organelle that contains the cell's genetic material and controls its activities, while other organelles like mitochondria and chloroplasts play important roles in cellular processes like respiration and photosynthesis.
Cellppt
This document provides information about cell structure and organization. It defines cells, tissues, organs and organ systems. It describes key differences between plant and animal cells as well as differences between prokaryotic and eukaryotic cells. It also outlines the structure and functions of important cell organelles including the plasma membrane, cell wall, cytoplasm, Golgi apparatus, endoplasmic reticulum, lysosomes, mitochondria, ribosomes and nucleus. Large vacuoles in plant cells are also discussed.
Ppt
Plant cells have several structures that are similar but also different than animal cells. The main parts of a plant cell include the cytoplasm, nucleus, cell membrane, cell wall, chromosomes, and plasmodesmata. The nucleus contains the genetic material and controls the activities of the cell. Surrounding the cell membrane is a tough but flexible cell wall that provides structural support and protection to the cell. Plasmodesmata are channels that allow molecules to travel between neighboring plant cells.
bcterialultrastructureall-201118081937.pdf
This document summarizes the ultrastructure of bacterial cells. It describes that bacteria are unicellular and microscopic. They have characteristic shapes including cocci, bacilli, vibrio and spirals. Their structures include a cell wall, plasma membrane, flagella for motility, pili for adhesion, capsules for protection, ribosomes for protein synthesis, and some can form endospores. The cell wall structure differs between gram-positive and gram-negative bacteria. The cytoplasm contains ribosomes and DNA but not membrane-bound organelles.
Cell wall.presentation
The document discusses the structure and composition of plant cell walls. It describes the primary components of plant cell walls including cellulose, hemicellulose, pectin, and lignin. It discusses the basic unit of secondary cell walls known as microfibrils. It also describes different types of secondary cell wall thickenings and pit structures found in cell walls.
Similar to Cell and its organelles (20)
VIII_SCI_L08_M02_CELL_STRUCTURE_AND_FUNCTIONS_PPT.pdf
VIII_SCI_L08_M02_CELL_STRUCTURE_AND_FUNCTIONS_PPT.pdf
CELL BIOLOGY LECTURE. Cells described in the purest of forms.
CELL BIOLOGY LECTURE. Cells described in the purest of forms.
More from Jatin Jindal
Forest and conservation
This document discusses strategies for conserving forests while maintaining their economic viability as working forests. It advocates preventing forestland conversion, maintaining a viable forestry industry, and increasing public support for sustainable practices. The Nature Conservancy's approach includes building partnerships, developing new tools like working forest easements and tax incentives, and projects supporting the forestry industry through debt purchases and tax credits. Case studies from Maine, New Hampshire, and Massachusetts demonstrate successful conservation of working forests through these types of collaborative strategies.
Engineers
The document discusses a new engineering structure that appears to be a roller coaster based on its ability to hang 866 feet in the air, have a 70 degree tilt, and operate at night. It questions how much readers trust engineers and implies the structure, while daring, was designed and can be operated safely based on engineering capabilities. The overall tone is excited about the new thrill ride and has faith in the engineers' abilities to create a fun and secure experience.
Dear son & daughter understand
This document contains a letter from a parent to their child about caring for them in old age. It asks the child to be patient, listen, and help as the parent's abilities decline. It reminds the child that the parent cared for them in the same way when they were young. It emphasizes that the most important thing is their continued love and being together, even as life and independence fade. It closes by expressing the parent's enduring love for their child.
Think for dad
A son or daughter's perspective of their father changes dramatically over time. As a young child, they see their father as all-knowing and great. As they become teenagers, they view their father as outdated and not understanding the modern world. In adulthood, they appreciate all the hardships their father endured to raise them and bring order to the family, realizing how difficult it was for him to manage and control things over time.
Complaints
This short email contains reflections on being grateful for what one has and considering those less fortunate. It encourages appreciating life as it is rather than complaining, as others have it much worse. It also promotes sharing this message to spread its message of perspective and gratitude.
Marketing
The document discusses marketing definitions, concepts, and management tasks. It provides 3 definitions of marketing from different organizations. It then explains key marketing concepts like the marketing mix, exchange concept, production concept, product concept, and marketing concept. The marketing concept focuses on determining customer needs and satisfying them. The document also outlines responsibilities of marketing management like market analysis and setting goals. It concludes by describing different types of marketing tasks like developmental marketing, remarketing, and demarketing.
Marketing
This document discusses key concepts in marketing management including the changing role of marketing, the 4 Ps of marketing, and the components of an effective marketing plan. It explains that marketing has shifted from a focus on physical efficiency to selling and adoption of a marketing approach. The marketing plan involves analyzing the current market situation, identifying opportunities and issues, developing a marketing strategy, and implementing and controlling the plan. An effective marketing plan with a clear business purpose and objectives can help firms achieve higher returns.
Mantra...
This document contains a collection of short sayings and messages attributed to the Dalai Lama for 2008. It encourages the reader to forward the "mantra" or collection of sayings to others within 96 hours in order to receive positive benefits and surprises, such as improvements in life or dreams coming true. The document suggests forwarding it to between 5 and 15 people will result in the best outcomes. It stresses not keeping the message and allowing it to leave one's hands within the time period.
Main shaadi nahin_karoonga...
A person asks where their salary is and checks their pockets to look for it. They joke that they will give their life but not their salary, as all of their money goes to cigarettes and they have to borrow money even for small things. They then announce happily that they have found their salary and will go shopping.
Mahatma....
This document contains short quotes and sayings from Mahatma Gandhi on various topics related to spirituality, service, peace, humanity, and creating positive change. Some of the key ideas expressed are that finding oneself comes through service to others, true worship comes from admiring nature, happiness results from harmony between thoughts, words and deeds, and that real peace requires educating children about nonviolence.
Live a life that matters....
At the end of life, wealth, fame, and accomplishments will not matter. What will matter is how you lived your life and the impact you had on others. A life that matters is defined not by what you accumulated, but by what you built and gave to others. It is measured by the acts of kindness, courage, and sacrifice that inspired others and the memories you leave behind in those who loved you. Choosing to live a life that matters is a conscious decision, not dependent on circumstance.
Kerala and goa ppt....
The document provides information about tourism in the Indian states of Kerala and Goa. It discusses that tourism is a major industry in India, contributing significantly to GDP and employment. It then focuses on Kerala and Goa, describing them as two of India's most popular tourist destinations. For each state, it outlines key attractions and locations, the tourism marketing strategies employed, popular accommodation options, and modes of transportation available. Major tourist attractions highlighted for each state include backwaters, beaches, hill stations, forts, churches, and waterfalls.
How to succeed
The document provides a 16-point plan for career success. Some key points include maintaining good communication, working hard to make your boss look good, dressing professionally, keeping deadlines, spending self-reflection time alone, and having a backup career plan while pursuing your goals with passion. The overall message is that focusing on relationships, work ethic, integrity and continual self-improvement are important for advancement.
Honey
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Himalayas
The Himalayas were formed by the collision of two continental plates - the Indo-Australian plate and the Eurasian plate. Approximately 50-55 million years ago, the Indo-Australian plate began moving northward due to plate tectonic forces, colliding with and subducting under the Eurasian plate and causing the land between the plates to fold and uplift, forming the Himalayan mountain range. Evidence like fossils of sea animals found high in the Himalayas and sedimentary rock materials support that the region was once under water. The Himalayas continue rising today as the plates still exert pressure against one another.
Get rid of_stress
The professor holds up a glass of water to demonstrate to students how problems that seem small can become overwhelming if dwelled upon for too long. While the weight of the glass did not change, the professor's arm would begin to ache after holding it for an hour and could become numb or lead to muscle stress if held all day. This represents how small problems may initially seem manageable but can paralyze us if we focus on them constantly. The lesson is that while problems should be thought through, it is important to "put the glass down" or stop thinking about problems at the end of the day so we can wake up fresh and able to handle challenges in a healthy way.
Generations of computer
This document summarizes the five generations of computers from the 1940s to present. The first generation used vacuum tubes and were large, expensive machines. The second generation introduced transistors, making computers smaller and more reliable. The third generation used integrated circuits, further reducing size and power needs. The fourth generation used VLSI chips and marked the beginning of personal computers. The fifth generation continues advancing processor and memory technology, artificial intelligence, and parallel processing.
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一比一原版美国佩斯大学毕业证如何办理
原版一模一样【微信：741003700 】【美国佩斯大学毕业证成绩单】【微信：741003700 】学位证，留信认证（真实可查，永久存档）原件一模一样纸张工艺/offer、雅思、外壳等材料/诚信可靠,可直接看成品样本，帮您解决无法毕业带来的各种难题！外壳，原版制作，诚信可靠，可直接看成品样本。行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备。十五年致力于帮助留学生解决难题，包您满意。
本公司拥有海外各大学样板无数，能完美还原。
1:1完美还原海外各大学毕业材料上的工艺：水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠。文字图案浮雕、激光镭射、紫外荧光、温感、复印防伪等防伪工艺。材料咨询办理、认证咨询办理请加学历顾问Q/微741003700
【主营项目】
一.毕业证【q微741003700】成绩单、使馆认证、教育部认证、雅思托福成绩单、学生卡等！
二.真实使馆公证(即留学回国人员证明,不成功不收费)
三.真实教育部学历学位认证（教育部存档！教育部留服网站永久可查）
四.办理各国各大学文凭(一对一专业服务,可全程监控跟踪进度)
如果您处于以下几种情况：
◇在校期间，因各种原因未能顺利毕业……拿不到官方毕业证【q/微741003700】
◇面对父母的压力，希望尽快拿到；
◇不清楚认证流程以及材料该如何准备；
◇回国时间很长，忘记办理；
◇回国马上就要找工作，办给用人单位看；
◇企事业单位必须要求办理的
◇需要报考公务员、购买免税车、落转户口
◇申请留学生创业基金
留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
办理美国佩斯大学毕业证【微信：741003700 】外观非常简单，由纸质材料制成，上面印有校徽、校名、毕业生姓名、专业等信息。
办理美国佩斯大学毕业证【微信：741003700 】格式相对统一，各专业都有相应的模板。通常包括以下部分：
校徽：象征着学校的荣誉和传承。
校名:学校英文全称
授予学位：本部分将注明获得的具体学位名称。
毕业生姓名：这是最重要的信息之一，标志着该证书是由特定人员获得的。
颁发日期：这是毕业正式生效的时间，也代表着毕业生学业的结束。
其他信息：根据不同的专业和学位，可能会有一些特定的信息或章节。
办理美国佩斯大学毕业证【微信：741003700 】价值很高，需要妥善保管。一般来说，应放置在安全、干燥、防潮的地方，避免长时间暴露在阳光下。如需使用，最好使用复印件而不是原件，以免丢失。
综上所述，办理美国佩斯大学毕业证【微信：741003700 】是证明身份和学历的高价值文件。外观简单庄重，格式统一，包括重要的个人信息和发布日期。对持有人来说，妥善保管是非常重要的。
Gadgets for management of stored product pests_Dr.UPR.pdf
Insectsplayamajorroleinthedeteriorationoffoodgrainscausingbothquantitativeandqualitativelosses
Wellprovedthatnogranariescanbefilledwithgrainswithoutinsectsastheharvestedproducecontainegg(or)larvae(or)pupae(or)adultinsectinthembecauseoffieldcarryoverinfestationwhichcannotbeavoidedindevelopingcountrieslikeIndia
Simpletechnologiesfortimelydetectionofinsectsinthestoredproduceandtherebyplantimelycontrolmeasures
Mechanisms and Applications of Antiviral Neutralizing Antibodies - Creative B...
Neutralizing antibodies, pivotal in immune defense, specifically bind and inhibit viral pathogens, thereby playing a crucial role in protecting against and mitigating infectious diseases. In this slide, we will introduce what antibodies and neutralizing antibodies are, the production and regulation of neutralizing antibodies, their mechanisms of action, classification and applications, as well as the challenges they face.
HUMAN EYE By-R.M Class 10 phy best digital notes.pdf
Class 10 human eye notes physics
Handwritten best quality
BIRDS DIVERSITY OF SOOTEA BISWANATH ASSAM.ppt.pptx
Ahota Beel, nestled in Sootea Biswanath Assam , is celebrated for its extraordinary diversity of bird species. This wetland sanctuary supports a myriad of avian residents and migrants alike. Visitors can admire the elegant flights of migratory species such as the Northern Pintail and Eurasian Wigeon, alongside resident birds including the Asian Openbill and Pheasant-tailed Jacana. With its tranquil scenery and varied habitats, Ahota Beel offers a perfect haven for birdwatchers to appreciate and study the vibrant birdlife that thrives in this natural refuge.
TOPIC OF DISCUSSION: CENTRIFUGATION SLIDESHARE.pptx
Centrifugation is a powerful technique used in laboratories to separate components of a heterogeneous mixture based on their density. This process utilizes centrifugal force to rapidly spin samples, causing denser particles to migrate outward more quickly than lighter ones. As a result, distinct layers form within the sample tube, allowing for easy isolation and purification of target substances.
Embracing Deep Variability For Reproducibility and Replicability
Embracing Deep Variability For Reproducibility and ReplicabilityUniversity of Rennes, INSA Rennes, Inria/IRISA, CNRS
Embracing Deep Variability For Reproducibility and Replicability
Abstract: Reproducibility (aka determinism in some cases) constitutes a fundamental aspect in various fields of computer science, such as floating-point computations in numerical analysis and simulation, concurrency models in parallelism, reproducible builds for third parties integration and packaging, and containerization for execution environments. These concepts, while pervasive across diverse concerns, often exhibit intricate inter-dependencies, making it challenging to achieve a comprehensive understanding. In this short and vision paper we delve into the application of software engineering techniques, specifically variability management, to systematically identify and explicit points of variability that may give rise to reproducibility issues (eg language, libraries, compiler, virtual machine, OS, environment variables, etc). The primary objectives are: i) gaining insights into the variability layers and their possible interactions, ii) capturing and documenting configurations for the sake of reproducibility, and iii) exploring diverse configurations to replicate, and hence validate and ensure the robustness of results. By adopting these methodologies, we aim to address the complexities associated with reproducibility and replicability in modern software systems and environments, facilitating a more comprehensive and nuanced perspective on these critical aspects.
https://hal.science/hal-04582287
Anti-Universe And Emergent Gravity and the Dark Universe
Recent theoretical progress indicates that spacetime and gravity emerge together from the entanglement structure of an underlying microscopic theory. These ideas are best understood in Anti-de Sitter space, where they rely on the area law for entanglement entropy. The extension to de Sitter space requires taking into account the entropy and temperature associated with the cosmological horizon. Using insights from string theory, black hole physics and quantum information theory we argue that the positive dark energy leads to a thermal volume law contribution to the entropy that overtakes the area law precisely at the cosmological horizon. Due to the competition between area and volume law entanglement the microscopic de Sitter states do not thermalise at sub-Hubble scales: they exhibit memory effects in the form of an entropy displacement caused by matter. The emergent laws of gravity contain an additional ‘dark’ gravitational force describing the ‘elastic’ response due to the entropy displacement. We derive an estimate of the strength of this extra force in terms of the baryonic mass, Newton’s constant and the Hubble acceleration scale a0 = cH0, and provide evidence for the fact that this additional ‘dark gravity force’ explains the observed phenomena in galaxies and clusters currently attributed to dark matter.
Compositions of iron-meteorite parent bodies constrainthe structure of the pr...
Magmatic iron-meteorite parent bodies are the earliest planetesimals in the Solar System,and they preserve information about conditions and planet-forming processes in thesolar nebula. In this study, we include comprehensive elemental compositions andfractional-crystallization modeling for iron meteorites from the cores of five differenti-ated asteroids from the inner Solar System. Together with previous results of metalliccores from the outer Solar System, we conclude that asteroidal cores from the outerSolar System have smaller sizes, elevated siderophile-element abundances, and simplercrystallization processes than those from the inner Solar System. These differences arerelated to the formation locations of the parent asteroids because the solar protoplane-tary disk varied in redox conditions, elemental distributions, and dynamics at differentheliocentric distances. Using highly siderophile-element data from iron meteorites, wereconstruct the distribution of calcium-aluminum-rich inclusions (CAIs) across theprotoplanetary disk within the first million years of Solar-System history. CAIs, the firstsolids to condense in the Solar System, formed close to the Sun. They were, however,concentrated within the outer disk and depleted within the inner disk. Future modelsof the structure and evolution of the protoplanetary disk should account for this dis-tribution pattern of CAIs.
11.1 Role of physical biological in deterioration of grains.pdf
Storagedeteriorationisanyformoflossinquantityandqualityofbio-materials.
Themajorcausesofdeteriorationinstorage
•Physical
•Biological
•Mechanical
•Chemical
Storageonlypreservesquality.Itneverimprovesquality.
Itisadvisabletostartstoragewithqualityfoodproduct.Productwithinitialpoorqualityquicklydepreciates
Farming systems analysis: what have we learnt?.pptx
Presentation given at the official farewell of Prof Ken Gillet at Wageningen on 13 June 2024
The cost of acquiring information by natural selection
This is a short talk that I gave at the Banff International Research Station workshop on Modeling and Theory in Population Biology. The idea is to try to understand how the burden of natural selection relates to the amount of information that selection puts into the genome.
It's based on the first part of this research paper:
The cost of information acquisition by natural selection
Ryan Seamus McGee, Olivia Kosterlitz, Artem Kaznatcheev, Benjamin Kerr, Carl T. Bergstrom
bioRxiv 2022.07.02.498577; doi: https://doi.org/10.1101/2022.07.02.498577
Mending Clothing to Support Sustainable Fashion_CIMaR 2024.pdf
Ozturkcan, S., Berndt, A., & Angelakis, A. (2024). Mending clothing to support sustainable fashion. Presented at the 31st Annual Conference by the Consortium for International Marketing Research (CIMaR), 10-13 Jun 2024, University of Gävle, Sweden.
Male reproduction physiology by Suyash Garg .pptx
Physiology of Male reproduction.
Video mentioned at page no. 23 as summary for better understanding
Post translation modification by Suyash Garg
overview of PTM helps to the students who wants to clear their basics about it.
fermented food science of sauerkraut.pptx
This ppt contains the production of a fermented food name - sauerkraut
Recently uploaded (20)
Gadgets for management of stored product pests_Dr.UPR.pdf
Gadgets for management of stored product pests_Dr.UPR.pdf
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TOPIC OF DISCUSSION: CENTRIFUGATION SLIDESHARE.pptx
TOPIC OF DISCUSSION: CENTRIFUGATION SLIDESHARE.pptx
Embracing Deep Variability For Reproducibility and Replicability
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Anti-Universe And Emergent Gravity and the Dark Universe
Anti-Universe And Emergent Gravity and the Dark Universe
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Compositions of iron-meteorite parent bodies constrainthe structure of the pr...
11.1 Role of physical biological in deterioration of grains.pdf
11.1 Role of physical biological in deterioration of grains.pdf
Farming systems analysis: what have we learnt?.pptx
Farming systems analysis: what have we learnt?.pptx
The cost of acquiring information by natural selection
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Mending Clothing to Support Sustainable Fashion_CIMaR 2024.pdf
Mending Clothing to Support Sustainable Fashion_CIMaR 2024.pdf
Cell and its organelles
- 3. PROKARYOTIC CELL EUKARYOTIC CELL * Size is small (1-10 micrometre) * Size is large (5-100 micrometre) * Nucleus is absent and known as nucleoid. * Nucleus is present & with nuclear membrane. * Contains single chromosome. * Contains a number of chromosomes. * Cell division takes place by budding or fission. *Cell division takes place by mitosis or meiosis. ANIMAL CELL PLANT CELL * Generally small in size. * Generally larger than animal cell. * No cell wall is present. * Cell wall in addition to the plasma membrane. * Plastids are absent. Vacuoles are small. * Plastids are present. Vacuoles are large. * Nucleus is generally near the centre. * Nucleus is present near the periphery.
- 4. *CELL WALL *CELL MEMBRANE *NUCLEUS *GOLGI APPARATUS *LYSOSOMES *RIBOSOMES *MITOCHONDRIA *VACUOLES *PLASTIDS
- 7. It is a 2-layered envelope which is porous & semi-permeable . It is transparent, semifluid, colloidal ground substance in which chromatin are present. It is a darky stained, spherical structure. network of long, fine threads There are 4 components of nucleus :
- 9. • CELL IS THE STRUCTURAL AND FUNCTIONAL UNIT OF LIFE. • CELL WAS DISCOVERED BY ROBERT HOOKE IN 1665. • DIFFERENT CELL ORGANELLES ARE CELL MEMBRANE, CELL WALL, NUCLEUS, GOLGI APPARATUS, LYSOSOMES, RIBOSOMES, MITOCHONDRIA, PLASTIDS & VACUOLES. • NUCLEUS IS THE MOST CONSPICUOUS AND LARGEST ORGANELLE OF A CELL. • IT WAS DISCOVERED BY ROBERT BROWN IN 1831. • IT IS ALSO KNOWN AS DIRECTOR OF THE CELL AS IT CONTROLS ALL THE ACTIVITIES OF THE CELL • NUCLEUS IS FORMED OF 4 COMPONENTS : NUCLEAR MEMBRANE , NUCLEOPLASM, NUCLEOLUS, NUCLEAR CHROMATIN.