Cell power point
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This document provides an introduction to the types and functions of cellular organelles. It describes the key differences between prokaryotic and eukaryotic cells, including that prokaryotes lack a nucleus and organelles while eukaryotes have a nucleus and organelles. It then outlines and describes the main organelles found in eukaryotic cells, including the nucleus, DNA, nucleolus, ribosomes, cytoplasm, endoplasmic reticulum, mitochondria, chloroplasts, lysosomes, vacuoles, Golgi apparatus, plastids, cytoskeleton, and cilia/flagella. It concludes by discussing the levels of biological organization from cells to tissues to organs and organ systems.
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Eukaryotic cells contain membrane-bound organelles, while prokaryotic cells do not. Eukaryotic cells include plant and animal cells and have organelles like the nucleus, mitochondria, endoplasmic reticulum, Golgi apparatus, lysosomes, chloroplasts (in plant cells), and vacuoles. Prokaryotic cells like bacteria are much simpler and lack these membrane-bound structures. The document provides details on the structures and functions of organelles in eukaryotic cells and differences between plant and animal cells. It suggests creating a poster to compare and contrast prokaryotic, plant and animal cells.
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Eukaryotic cells contain specialized structures called organelles that carry out different functions. The main organelles include the nucleus, which contains the cell's DNA; the endoplasmic reticulum for protein transport; mitochondria and chloroplasts for energy production; and lysosomes for digestion. Plant and animal cells differ in structures like cell walls, chloroplasts, and central vacuoles. The cytoskeleton helps maintain the cell's shape and enables movement. Mitochondria and chloroplasts likely evolved from ancient symbiotic relationships between prokaryotes and eukaryotes.
Cell presentation
This document provides an overview of cells, including:
1) It describes the cell theory - that all living things are made of cells, cells are the basic functional units of life, and all cells come from pre-existing cells.
2) It explains the differences between prokaryotic and eukaryotic cells, noting that eukaryotic cells have membrane-bound organelles and a nucleus.
3) It provides a brief overview of key cell structures and their functions, such as the cell membrane, nucleus, mitochondria, chloroplasts, and vacuoles.
Cells and their_functions1
The document discusses cells, their structures and functions. It defines a cell as the basic unit of life and structure in organisms. Cells come in different shapes and sizes depending on their function. Key structures of plant and animal cells include the cell membrane, cell wall, nucleus, mitochondria, chloroplasts and vacuoles. The document also covers the early scientists who discovered and studied cells, as well as levels of organization from cells to tissues to organs to organ systems within organisms.
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Ib evolution
Evolution is the cumulative change in heritable traits of a population over generations. It occurs through natural selection acting on genetic variation between individuals. Variation arises from sexual reproduction and genetic recombination. Populations tend to produce more offspring than the environment can support, leading to competition for limited resources. Individuals with traits better suited to the environment are more likely to survive and reproduce, passing these favorable traits to the next generation. Over many generations, this process can result in new species adapted to their environment.
Dna to rna to amino acids
1. DNA contains genetic information that must be copied into RNA to leave the cell. RNA comes in three types: mRNA, rRNA, and tRNA.
2. mRNA carries protein synthesis instructions from DNA to the cytoplasm. It attaches to ribosomes where protein synthesis occurs. tRNA carries amino acids to the ribosome during protein synthesis.
3. Protein synthesis involves two steps: transcription copies DNA into mRNA, and translation uses mRNA to assemble amino acids into proteins with help from tRNA and ribosomes.
Dna structure notes
This document discusses the structure and function of DNA. It notes that DNA is made up of nucleotides that contain deoxyribose, phosphate groups, and nitrogen bases. The nitrogen bases, adenine, guanine, thymine, and cytosine, always pair up in the same way - adenine pairs with thymine and guanine pairs with cytosine. These base pairs form the sides of the DNA double helix structure, with the sugar and phosphate groups forming the backbone of the helix. The document then briefly describes how DNA replicates through unwinding of the helix by helicase enzymes and addition of matching nucleotides by polymerase.
Practicing sceintific method
This document outlines the steps of the scientific method including developing a hypothesis, identifying variables, collecting data through experimentation, analyzing results, and drawing a conclusion. It provides examples of key components such as independent and dependent variables, controls, procedures, and how to document experiments in a table. The example experiment tests how different insulation materials affect the temperature of water in jars, with the insulation type as the independent variable and temperature change as the dependent variable. The document explains how to analyze and present quantitative data visually through graphs or charts in the conclusion.
Graphing 101
This document provides an overview of graphing rules and types of graphs. It defines data as information gathered during experiments and recorded in tables, drawings, or notes. The key rules for graphing are to title the graph, label the x and y axes properly, use the full graph space, make data points or bars visible, and connect data points with lines or curves for line graphs. The types of graphs covered are bar graphs for non-numerical variables, histograms to plot frequency of physical variables, line graphs for relationships between variables, and pie graphs to show proportions.
Diffusion & osmosis notes lecture
Cell membranes must control what enters and exits the cell to maintain homeostasis. The plasma membrane is made of a bilayer of phospholipids and proteins. This fluid mosaic structure allows some particles to pass through, while proteins act as markers and gates to regulate passage. Diffusion is the process by which particles spread out from areas of high concentration to low concentration until an even distribution is reached. Osmosis is a type of diffusion where water moves through a membrane from high to low concentration areas. The concentration gradient and solution types determine the effect on cell volume.
The discovery of cells notes
The document discusses the early discoveries of cells in the 1600s by van Leeuwenhoek and Hooke using early microscopes. They observed "cells" and drew hundreds of examples, with Hooke naming them cells based on their similarities to small monk rooms. This early work led to the development of the Cell Theory which states that all living things are made of cells, cells are the basic unit of structure and function, and cells come from pre-existing cells. The document also describes the two main types of cells - prokaryotes which are bacteria and lack organelles/nucleus, and eukaryotes which are mostly multicellular organisms that have a nucleus and organelles.
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