This document provides a classification of bacteria based on various characteristics. It discusses classification based on mode of nutrition, temperature requirements, pH tolerance, salt tolerance, gas requirements, morphology, gram staining, presence of flagella, and ability to form spores. For each category of classification, examples of bacteria that fall into each category are provided. The document is submitted as an assignment on bacterial classification for a botany class.
Bacterial Growth Curve microbiology | Log phase lag phase stationary phase in microbial growth
bacterial growth curve microbiology
In this video, I will be discussing what the bacterial growth curve reflects, different phases & their significance.
Bacterial growth curve and microbial growth kinetics - This microbiology lecture is going to teach you about the bacterial growth curve and the microbial growth kinetics. The microbial growth curve consists of 4 phases.
Lag phase of the growth curve, Log phase of the bacterial growth curve which is also known as the exponential growth phase and the stationary phase of bacterial growth curve where the bacterial growth is about to stop. The last phase of microbial growth curve is the death phase where the cell death is complete and the bacterial population starts declining.
Stay tuned to know more about the bacterial growth curve microbiology.
Thank you for watching the video lecture on microbial growth curve microbiology.
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Qualification
Maneesha M Joseph
MSc MLT (Microbiology)
Assistant Professor
Baby memorial college of allied Health science
Kozhikode
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Bacterial Growth Curve
Bacterial Growth Curve microbiology | Log phase lag phase stationary phase in microbial growth
bacterial growth curve microbiology
In this video, I will be discussing what the bacterial growth curve reflects, different phases & their significance.
Bacterial growth curve and microbial growth kinetics - This microbiology lecture is going to teach you about the bacterial growth curve and the microbial growth kinetics. The microbial growth curve consists of 4 phases.
Lag phase of the growth curve, Log phase of the bacterial growth curve which is also known as the exponential growth phase and the stationary phase of bacterial growth curve where the bacterial growth is about to stop. The last phase of microbial growth curve is the death phase where the cell death is complete and the bacterial population starts declining.
Stay tuned to know more about the bacterial growth curve microbiology.
Thank you for watching the video lecture on microbial growth curve microbiology.
As the channel name suggests, our channel will be a perfect lounge for the malayali medicos..we wil be covering videos which will be like lecture classes related to the subjects biochemistry and microbiology in which we are specialised.. It will be a better learning experience for the students especially for those who are not able to understand and follow the normal classes in college..we assure the students that you will get a basic idea regarding the topic and extra reading can be done from the reference textbooks...
If you like my video
#like
#comment
#subscribe my channel
don't forget to subscribe my channel
Qualification
Maneesha M Joseph
MSc MLT (Microbiology)
Assistant Professor
Baby memorial college of allied Health science
Kozhikode
Our Partner Channel
Health & Voyage channel link - https://youtu.be/nzKqRVjlwc0
#Mallu
#Microbiology
#Biochemistry
#MalluMedicosLounge
#HealthAndVoyage
Bacterial Growth Curve
Genetic diversity of Potyviruses infecting cucurbit cropsPGS
This lecture was a part of Plant Genetics Seminars - PGS 2017/2018 at Assiut University. These seminars organized by Dr. Ahmed Sallam, Department of Genetics, Faculty of Agriculture, Assiut University
Abstract
In 2013, we published the first report of a novel potyvirus isolate, which was tentatively named squash chlorosis mottling virus (SqCMV), from an infected squash plant (Cucurbita pepo) collected in the Homestead area of Florida. The purpose of the current work was to further characterize the virus isolate based on molecular properties, and to determine its relationship to other potyviruses. The complete genome sequence of the virus was 10,292 nucleotides (nt), consisting of a 5’-UTR (182 nt), a complete ORF (10,098 nt) encoding a polyprotein of 3,365 amino acids, a motif for the PIPO protein and a 3’-UTR
(112 nt), but excluding the poly-(A) tail. Phylogenetic analysis based on the complete genome and amino acid sequences revealed that the virus from Florida clustered with the type isolate of the newly described potyvirus zucchini tigré mosaic virus (ZTMV) sharing 82-90% nucleotide and 83-86% amino acid identities, respectively. Recombination analysis confirmed one major recombination event in the putative P1 coding region of the virus with the putative parental sequences predicted to resemble to ZTMV-Venezuela and France isolates. In addition, genetic diversity analysis indicated that the CP gene was under the highest selection pressure compared to other genes. Together, these results suggest that SqCMV and ZTMV are both representative isolates of the same species, Zucchini tiger mosaic virus. We present the first complete genome sequence of the ZTMV-HFL isolate from the USA.
viruses are intracellular obligate parasites. They are either DNA or RNA viruses. In order to grow in labs, tissue culture is used. Some general characteristics of viruses are discussed here.
Major divisions in Bergey's manual of systematic bacteriology 2nd edition presented for examination purpose. Pinned important points are compiled here for students.
Genetic diversity of Potyviruses infecting cucurbit cropsPGS
This lecture was a part of Plant Genetics Seminars - PGS 2017/2018 at Assiut University. These seminars organized by Dr. Ahmed Sallam, Department of Genetics, Faculty of Agriculture, Assiut University
Abstract
In 2013, we published the first report of a novel potyvirus isolate, which was tentatively named squash chlorosis mottling virus (SqCMV), from an infected squash plant (Cucurbita pepo) collected in the Homestead area of Florida. The purpose of the current work was to further characterize the virus isolate based on molecular properties, and to determine its relationship to other potyviruses. The complete genome sequence of the virus was 10,292 nucleotides (nt), consisting of a 5’-UTR (182 nt), a complete ORF (10,098 nt) encoding a polyprotein of 3,365 amino acids, a motif for the PIPO protein and a 3’-UTR
(112 nt), but excluding the poly-(A) tail. Phylogenetic analysis based on the complete genome and amino acid sequences revealed that the virus from Florida clustered with the type isolate of the newly described potyvirus zucchini tigré mosaic virus (ZTMV) sharing 82-90% nucleotide and 83-86% amino acid identities, respectively. Recombination analysis confirmed one major recombination event in the putative P1 coding region of the virus with the putative parental sequences predicted to resemble to ZTMV-Venezuela and France isolates. In addition, genetic diversity analysis indicated that the CP gene was under the highest selection pressure compared to other genes. Together, these results suggest that SqCMV and ZTMV are both representative isolates of the same species, Zucchini tiger mosaic virus. We present the first complete genome sequence of the ZTMV-HFL isolate from the USA.
viruses are intracellular obligate parasites. They are either DNA or RNA viruses. In order to grow in labs, tissue culture is used. Some general characteristics of viruses are discussed here.
Major divisions in Bergey's manual of systematic bacteriology 2nd edition presented for examination purpose. Pinned important points are compiled here for students.
This is presentation about classification and nutrition of bacteria. Bacteria are classified depending on various parameters viz. cell wall, temperature, air, salt concentration, Pressure, presence of flagella, pH etc.
General Characteristics of microbes.pptxRomy Markose
General Characteristics of Microbes is the 2nd unit of Microbiology subject for Nursing students. Students are able to understand the classification, morphology, structure, growth & nutrition, laboratory methods for the identification of bacteria.
THE IMPORTANCE OF MARTIAN ATMOSPHERE SAMPLE RETURN.Sérgio Sacani
The return of a sample of near-surface atmosphere from Mars would facilitate answers to several first-order science questions surrounding the formation and evolution of the planet. One of the important aspects of terrestrial planet formation in general is the role that primary atmospheres played in influencing the chemistry and structure of the planets and their antecedents. Studies of the martian atmosphere can be used to investigate the role of a primary atmosphere in its history. Atmosphere samples would also inform our understanding of the near-surface chemistry of the planet, and ultimately the prospects for life. High-precision isotopic analyses of constituent gases are needed to address these questions, requiring that the analyses are made on returned samples rather than in situ.
Richard's entangled aventures in wonderlandRichard Gill
Since the loophole-free Bell experiments of 2020 and the Nobel prizes in physics of 2022, critics of Bell's work have retreated to the fortress of super-determinism. Now, super-determinism is a derogatory word - it just means "determinism". Palmer, Hance and Hossenfelder argue that quantum mechanics and determinism are not incompatible, using a sophisticated mathematical construction based on a subtle thinning of allowed states and measurements in quantum mechanics, such that what is left appears to make Bell's argument fail, without altering the empirical predictions of quantum mechanics. I think however that it is a smoke screen, and the slogan "lost in math" comes to my mind. I will discuss some other recent disproofs of Bell's theorem using the language of causality based on causal graphs. Causal thinking is also central to law and justice. I will mention surprising connections to my work on serial killer nurse cases, in particular the Dutch case of Lucia de Berk and the current UK case of Lucy Letby.
Professional air quality monitoring systems provide immediate, on-site data for analysis, compliance, and decision-making.
Monitor common gases, weather parameters, particulates.
Richard's aventures in two entangled wonderlandsRichard Gill
Since the loophole-free Bell experiments of 2020 and the Nobel prizes in physics of 2022, critics of Bell's work have retreated to the fortress of super-determinism. Now, super-determinism is a derogatory word - it just means "determinism". Palmer, Hance and Hossenfelder argue that quantum mechanics and determinism are not incompatible, using a sophisticated mathematical construction based on a subtle thinning of allowed states and measurements in quantum mechanics, such that what is left appears to make Bell's argument fail, without altering the empirical predictions of quantum mechanics. I think however that it is a smoke screen, and the slogan "lost in math" comes to my mind. I will discuss some other recent disproofs of Bell's theorem using the language of causality based on causal graphs. Causal thinking is also central to law and justice. I will mention surprising connections to my work on serial killer nurse cases, in particular the Dutch case of Lucia de Berk and the current UK case of Lucy Letby.
Observation of Io’s Resurfacing via Plume Deposition Using Ground-based Adapt...Sérgio Sacani
Since volcanic activity was first discovered on Io from Voyager images in 1979, changes
on Io’s surface have been monitored from both spacecraft and ground-based telescopes.
Here, we present the highest spatial resolution images of Io ever obtained from a groundbased telescope. These images, acquired by the SHARK-VIS instrument on the Large
Binocular Telescope, show evidence of a major resurfacing event on Io’s trailing hemisphere. When compared to the most recent spacecraft images, the SHARK-VIS images
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A brief information about the SCOP protein database used in bioinformatics.
The Structural Classification of Proteins (SCOP) database is a comprehensive and authoritative resource for the structural and evolutionary relationships of proteins. It provides a detailed and curated classification of protein structures, grouping them into families, superfamilies, and folds based on their structural and sequence similarities.
What is greenhouse gasses and how many gasses are there to affect the Earth.moosaasad1975
What are greenhouse gasses how they affect the earth and its environment what is the future of the environment and earth how the weather and the climate effects.
Introduction:
RNA interference (RNAi) or Post-Transcriptional Gene Silencing (PTGS) is an important biological process for modulating eukaryotic gene expression.
It is highly conserved process of posttranscriptional gene silencing by which double stranded RNA (dsRNA) causes sequence-specific degradation of mRNA sequences.
dsRNA-induced gene silencing (RNAi) is reported in a wide range of eukaryotes ranging from worms, insects, mammals and plants.
This process mediates resistance to both endogenous parasitic and exogenous pathogenic nucleic acids, and regulates the expression of protein-coding genes.
What are small ncRNAs?
micro RNA (miRNA)
short interfering RNA (siRNA)
Properties of small non-coding RNA:
Involved in silencing mRNA transcripts.
Called “small” because they are usually only about 21-24 nucleotides long.
Synthesized by first cutting up longer precursor sequences (like the 61nt one that Lee discovered).
Silence an mRNA by base pairing with some sequence on the mRNA.
Discovery of siRNA?
The first small RNA:
In 1993 Rosalind Lee (Victor Ambros lab) was studying a non- coding gene in C. elegans, lin-4, that was involved in silencing of another gene, lin-14, at the appropriate time in the
development of the worm C. elegans.
Two small transcripts of lin-4 (22nt and 61nt) were found to be complementary to a sequence in the 3' UTR of lin-14.
Because lin-4 encoded no protein, she deduced that it must be these transcripts that are causing the silencing by RNA-RNA interactions.
Types of RNAi ( non coding RNA)
MiRNA
Length (23-25 nt)
Trans acting
Binds with target MRNA in mismatch
Translation inhibition
Si RNA
Length 21 nt.
Cis acting
Bind with target Mrna in perfect complementary sequence
Piwi-RNA
Length ; 25 to 36 nt.
Expressed in Germ Cells
Regulates trnasposomes activity
MECHANISM OF RNAI:
First the double-stranded RNA teams up with a protein complex named Dicer, which cuts the long RNA into short pieces.
Then another protein complex called RISC (RNA-induced silencing complex) discards one of the two RNA strands.
The RISC-docked, single-stranded RNA then pairs with the homologous mRNA and destroys it.
THE RISC COMPLEX:
RISC is large(>500kD) RNA multi- protein Binding complex which triggers MRNA degradation in response to MRNA
Unwinding of double stranded Si RNA by ATP independent Helicase
Active component of RISC is Ago proteins( ENDONUCLEASE) which cleave target MRNA.
DICER: endonuclease (RNase Family III)
Argonaute: Central Component of the RNA-Induced Silencing Complex (RISC)
One strand of the dsRNA produced by Dicer is retained in the RISC complex in association with Argonaute
ARGONAUTE PROTEIN :
1.PAZ(PIWI/Argonaute/ Zwille)- Recognition of target MRNA
2.PIWI (p-element induced wimpy Testis)- breaks Phosphodiester bond of mRNA.)RNAse H activity.
MiRNA:
The Double-stranded RNAs are naturally produced in eukaryotic cells during development, and they have a key role in regulating gene expression .
Comparing Evolved Extractive Text Summary Scores of Bidirectional Encoder Rep...University of Maribor
Slides from:
11th International Conference on Electrical, Electronics and Computer Engineering (IcETRAN), Niš, 3-6 June 2024
Track: Artificial Intelligence
https://www.etran.rs/2024/en/home-english/
Nutraceutical market, scope and growth: Herbal drug technologyLokesh Patil
As consumer awareness of health and wellness rises, the nutraceutical market—which includes goods like functional meals, drinks, and dietary supplements that provide health advantages beyond basic nutrition—is growing significantly. As healthcare expenses rise, the population ages, and people want natural and preventative health solutions more and more, this industry is increasing quickly. Further driving market expansion are product formulation innovations and the use of cutting-edge technology for customized nutrition. With its worldwide reach, the nutraceutical industry is expected to keep growing and provide significant chances for research and investment in a number of categories, including vitamins, minerals, probiotics, and herbal supplements.
1. Assignment topic :
Classification of bacteria
Assignment no:
01
Name : Iram Shehzadi
Roll no :
02
Class : MSc Botany II
Submitted to :
Mam Hira
Department :
Botany Uol Sargodha campus
Classification Of Bacteria
2. On The Basis Of Mode Of Nutrition
A. . On The Basis Of Optimum Temperature Requirement For Growth
B. . On The Basis Of Optimal Ph For Growth
C. . On The Basis Of Salt Concentration
D. . On The Basis Of Gaseous Requirement
E. On The Basis Of Morphology
F. . On The Basis Of Gram Staining
G. . On The Basis Of Flagella
H. On the basis of spore
A] Classification of bacteria on the basis of mode of
nutrition
1. Phototrops:
Those bacteria which gain energy from light
Phototrops are further divided into two groups on the basis of source of electron.
Photolithotrops: these bacteria gain energy from light and uses reduced inorganic
compounds such as H2S as electron source. Eg. Chromatium okenii
Photoorganotrops: these bacteria gain energy from light and uses organic
compounds such as succinate as electron source.
2. Chemotrops:
Those bacteria gain energy from chemical compounds
They cannot carry out photosynthesis
Chemotrops are further divided into two groups on the basis of source of electron.
Chemolithotrops: they gain energy from oxidation of chemical compound and
reduces inorganic compounds such as NH3 as electron source. Eg. Nitrosomonas
Chemoorganotrops: they gain energy from chemical compounds and uses organic
compound such as glucose and amino acids as source of electron. eg. Pseudomonas
pseudoflava.
3. Autotrops:
Those bacteria which uses carbondioxide as sole source of carbon to prepare its own food.
Autotrops are divide into two types on the basis of energy utilized to assimilate
carbondioxide. Ie. Photoautotrops and chemoautotrops
Photoautotrops: they utilized light to assimilate CO2. They are further divided into
two group on the basis of electron sources. Ie. Photolithotropic autotrops and
Photoorganotropic autotrops
Chemoautotrops: they utilize chemical energy for assimilation of CO2
4. Heterotrops:
They lack the ability to fix CO2
Those bacteria which uses organic compound as carbon source
3. Most of the human pathogenic bacteria are heterotropic in nature
Some heterotrops are simple, because they have simple nutritional requirement. However
there are some bacteria that require special nutrients for their growth; known as fastidious
heterotrops.
B] Classification of bacteria on the basis of optimum
temperature of growth
1. Psychrophiles:
Bacteria that can grow at 0°C or below but the optimum temperature of growth is 15 °C
or below and maximum temperature is 20°C are called psychrophiles
Psychrophiles have polyunsaturated fattyacids in their cell membrane which gives fluid
nature to the cell membrane even at lower temperature.
Examples: Vibrio psychroerythrus, vibrio marinus, Polaromonas vaculata, Psychroflexus
2. Psychrotrops (facultative psychrophiles):
Those bacteria that can grow even at 0°C but optimum temperature for growth is (20-
30)°C
3. Mesophiles:
Those bacteria that can grow best between (25-40)C but optimum temperature for growth
is 37C
Most of the human pathogens are mesophilic in nature
Examples: coli, Salmonella, Klebsiella, Staphulococci
4. Thermophiles:
Those bacteria that can best grow above 45C.
Thermophiles capable of growing in mesophilic range are called facultative thermophiles.
True thermophiles are called as Stenothermophiles, they are obligate thermophiles,
Thermophils contains saturated fattyacids in their cell membrane so their cell membrane
does not become too fluid even at higher temperature.
Examples: Streptococcus thermophiles, Bacillus stearothermophilus, Thermus aquaticus,
5. Hypethermophiles:
Those bacteria that have optimum temperature of growth above 80C.
Mostly Archeobacteria are hyperthermophiles.
Monolayer cell membrane of Archeobacteria is more resistant to heat and they adopt to
grow in higher remperature.
Examples: Thermodesulfobacterium, Aquifex, Pyrolobus fumari, Thermotoga
4. C] Classification of bacteria on the basis of optimum pH of
growth
1. Acidophiles:
Those bacteria that grow best at acidic pH
The cytoplasm of these bacteria are acidic in nature.
Some acidopiles are thermophilic in nature, such bacteria are called Thermoacidophiles.
Examples: Thiobacillus thioxidans, Thiobacillus, ferroxidans, Thermoplasma, Sulfolobus
2. Alkaliphiles:
Those bacteria that grow best at alkaline pH
Example: vibrio cholerae: oprimum ph of growth is 8.2
3. Neutriphiles:
Those bacteria that grow best at neutral pH (6.5-7.5)
Most of the bacteria grow at neutral pH
Example: E. coli
D] Classification of bacteria on the basis of salt
requirement
1. Halophiles:
Those bacteria that require high concentration of NaCl for growth.
Cell membrane of halophilic bacteria is made up of glycoprotein with high content of
negatively (-Ve) charged glutamic acid and aspartic acids. So high concentration of Na+
ion concentration is required to shield the –ve charge.
Example: Archeobacteria, Halobacterium, Halococcus
2. Halotolerant:
Most of the bacteria do not require NaCl but can tolerate low concentration of NaCl in
growth media are called halotolerant
E] Classification of bacteria on the basis of gaseous
requirement
1. Obligate aerobes:
Those bacteria that require oxygen and cannot grow in the absence of O2.
These bacteria carryout only oxidative type of metabolism.
Examples; Mycobacterium, Bacillus
5. 2. Facultative anaerobes:
Those bacteria that do not require O2 but can use it if available.
Growth of these bacteria become batter in presence of O2
These bacteria carryout both oxidative and fermentative type of metabolism
Examples: coli, Klebsiella, Salmonella
3. Aerotolerant anaerobes;
Those bacteria do not require O2 for growth but can tolerate the presence of O2.
Growth of these bacteria is not affected by the presence of O2.
These bacteria have only fermentative type of metabolism.
Example: lactobacillus
4. Microaerophiles:
Those bacteria that do not require O2 for growth but can tolerate low concentration of O2.
At atmospheric level of Oxygen growth of these bacteria is inhibited.
These bacteria only have oxidative type of metabolism
Example: Campylobacter
5. Obligate anaerobes:
Those bacteria that can grow only in absence of Oxygen.
Oxygen is harmful to obligate anaerobes
These bacteria have only fermentative type of metabolism
Examples: Peptococcus, Peptostreptococcus, Slostridium, methanococcus
6. Capnophiles:
Those bacteria that require carbondioxide for growth.
They are CO2 loving organism
Most of the microaerophiles are capnophilic in nature.
Example: Campylobacter, Helicobacter pylori, Brucella abortus
F] Classification of bacteria on the basis of Morphology
1. Coccus:
These bacteria are spherical or oval in shape
On the basis of arrangement, cocci are further classified as-
i) Diplococcus: coccus in pair. Eg, Neissseria gonorrhoae, Pneumococcus
ii) Streptococcus: coccus in chain. Eg. Streptococcus salivarius
iii) Staphylococcus: coccus in bunch. Eg. Staphylococcus aureus
iv) Tetrad: coccus in group of four.
6. v) Sarcina: cocus in cubical arrangement of cell. Eg. Sporosarcina
2. Bacilli:
These are rod shaped bacteria
On the basis of arrangement, bacilli are further classified as-
i) Coccobacilli: Eg. Brucella
ii) Streptobacilli: chain of rod shape bacteria: Eg. Bacillus subtilis,
iii) Comma shaped: Eg. Vibrio cholarae
iv) Chinese letter shaped: Corynebacterium dephtherae
3. Mycoplasma
They are cell wall lacking bacteria
Also known as PPLO (Pleuropneumonia like organism)
Mycoplasma pneumoniae
4. Spirochaetes:
They are spiral shaped bacteria
Spirochaetes
5. Rickettsiae and Chlamydiae;
They are obligate intracellular parasites resemble more closely to viruses than bacteria
6. Actinomycetes
They have filamentous or branching structure
They resemble more closely to Fungi than bacteria
Example: Streptomyces
G] Classification of bacteria on the basis of Gran staining
1. Gram positive bacteria:
cell wall of these bacteria is composed of peptidoglycan layer only.
Eg. Staphylococcus, Streptococcus, micrococcus
2. Gram negative bacteria:
cell wall of these bacteria is composed of Peptidoglycan and outer membrane.
Eg. E. coli, Salmonella
H] Classification of bacteria on the basis of Flagella
1. Monotrichous bacteria:
bacteria having single flagella in one end of cell.
eg. Vibrio cholera, Pseudomonas aerogenosa
7. 2. Lophotrichous bacteria:
bacteria having bundle of flagella in one end of cell.
eg. Pseudomanas fluroscence
3. Amphitrichous bacteria:
bacteria having single or cluster of flagella at both end of cell.
eg. Aquaspirillium
4. Peritrichous bacteria:
bacteria having flagella all over the cell surface.
Eg. E.coli, Salmonella, Klebsiella
5. Atrichous bacteria:
bacteria without flagella.
Eg. Shigella
I] Classification of bacteria on the basis of Spore
1. Spore forming bacteria:
Those bacteria that produce spore during unfavorable condition.
These are further divided into two group
i) Endospore forming bacteria:
Spore produced within the bacterial cell.
Bacillus, Clostridium, Sporosarcina etc
ii) Exospore forming bacteria:
Spore produced outside the cell
Methylosinus
2. Non sporing bacteria:
those bacteria which do not produce spore.
Eg. E. coli, Salmonella
8.
9. Assignment topic :
Oxygenic and anoxygenic photosynthesis
Assignment no
01
Name Iram Shehzadi
Rol no 02
Class MSc Botany ll
Submittedto
Sir Umair Ahmed
Department of Botany
University ofLahore Sargodhacampus
10. Oxygenic photosynthesis
The process used by plants ,algae and some other
photosynthetic bacteria in which CO2 is reduced to carbohydrates and
electron are removed from water releasing O2 into air.
Oxygenic photosynthesis is a non-cyclic photosynthetic
electron chain where the initial electron donor is water and, as a
consequence, molecular oxygen is liberated as a byproduct. The
use of water as an electron donor requires a
photosynthetic apparatus with two reaction centers. The
photosystem l and photosystem ll
Oxygenic photosynthesis is also called Z - Scheme . it is the only
biochemical reaction known to produce molecular oxygen .The
other products of this system are NADPH and ATP that represent the
conversion of light energy into chemical energy.
11. Anoxygenic photosynthesis
The process in which oxygen is not released is
called anoxygenic photosynthesis
Anoxygenic photosynthesis is performed by many bacteria.During this
process light energy is used to remove electron from other source not
from water. Thheses sources include hydrogen gas hydrogen sulfide
and iron compounds.Therefore instead of releasing oxygen other
compounds like sulphur are released.
Bacteria are the only organisms that uses anoxygenic photosynthesis.
There are four type of bacteria that perform anoxygenic photosynthesis