Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [anaerobic-respiration]

The generation of ATP from the breakdown of organic molecules in the absence of oxygen.

3
votes
1answer
167 views

Is it possible to make anaerobic media too reducing?

I've been struggling to grow an anaerobe (P. gingivalis), I take every precaution to keep the culture conditions free of oxygen, I was wondering if the conditions can be so reducing that they inhibit ...
1
vote
0answers
49 views

fermentation in soil bacteria

I am doing a project on microbial fuel cell. For the purpose of the efficiency of the question, MFCs can be summarized to: Devices that use anaerobic bacteria as the catalysts to oxidize organic ...
1
vote
1answer
111 views

Can nitrate be an electron acceptor for NADH generated in the citric acid cycle?

Is the citric acid cycle aerobic or anaerobic? I know that the oxygen is required to accept the NADH electrons so that NAD+ could be regenerated. Nevertheless, if other electron acceptors, as nitrate (...
4
votes
1answer
65 views

Do strictly anaerobic organisms use metabolic reactions requiring oxygen?

When looking through genome annotations of strictly anaerobic organisms I see reactions featuring oxygen. I suspect these are likely an artifact of the annotation process. But I am wondering if it is ...
10
votes
3answers
975 views

Why are there so few multicellular anaerobes?

There are a few documented cases of multicellular anaerobic organisms, but I can't see a reason for it to not be more common. On the contrary, it seems pretty useful to be able to create energy even ...
1
vote
0answers
1k views

How many oxygen atoms are used up in aerobic oxidation of one pyruvate? [closed]

Please explain elaborately, if possible using the EMP, Krebs and ETS cycles.
4
votes
2answers
1k views

Pyruvate as a final electron acceptor in the electron transport chain

During anaerobic respiration, why are electrons carried by NADH not transferred to the electron transport chain (ETC)? What happens is that lactate dehydrogenase reduces pyruvate to lactate, while ...
3
votes
2answers
678 views

Facultative anaerobic organism

While I was studying Cellular Respiration: Harvesting Chemical Energy, I found this question: An organism is discovered that consumes a considerable amount of sugar, yet does not gain much weight ...
1
vote
0answers
314 views

What is the terminal electron acceptor in methanogenesis?

I learnt that methanogenesis is a type of anaerobic respiration that utilizes carbon compounds such as CO2 or acetic acid as their terminal electron acceptor in their electron transport chain rather ...
2
votes
1answer
424 views

Can a cell survive temporarily without oxygen? [closed]

Can temporary denial of oxygen to a cell damage the cell? Will the cell continue to live in partially damaged condition if the supply of oxygen and nutrients are restored?
3
votes
1answer
67 views

Do sulfate reducing bacteria ingest their sulfate as solid, or as dissolved in water?

Do sulfate reducing bacteria ingest their sulfate as solid, or liquid or gas? I understand that almost all forms of sulfate are solid.. and sulfate can be dissolved in water(thus no longer solid, but ...
9
votes
3answers
2k views

Are humans capable of both anaerobic respiration, and lactic acid fermentation?

Are humans capable of both anaerobic respiration, and lactic acid fermentation? And if so, when do they do each? I understand that the difference between respiration and fermentation is that ...
3
votes
1answer
1k views

How does reversibility of lactic acid fermentation work?

For the production of lactic acid we need pyruvate from glycolysis. This process is known as lactic acid fermentation. One of the features of this process is reversibility. How does this reversibility ...
1
vote
0answers
37 views

Anaerobic nutrient expenditure

Doing some research into different forms of exercise and energy systems and I realized something odd about the way we talk about energy. When we eat, we take on macronutrients that are broken down ...
23
votes
1answer
7k views

Why do you die if you cannot breathe?

I was wondering what the actual reason for death by suffocation is. Obviously it is related to oxygen deprivation. But what is the underlying cause of death? Is it due to insufficient oxygen for ...
1
vote
1answer
64 views

ATP yield of fermentation: study to cite?

Everywhere I find the ATP yields of respiratory and fermentative metabolism of glycolysis. While that of oxidative phosphorilation I could find in Stryer to cite one study where this was addressed (...
3
votes
2answers
354 views

At what levels of muscle energy intake does catabolism start?

From my own reading, there are three ways used by the body to produce energy: Alactic anaerobic (direct degradation of ATP and creatine phosphate for regeneration of ATP) Lactic anaerobic (breakdown ...
15
votes
1answer
1k views

What are the requirements for a stable carbon cycle in sealed “bottle gardens”`?

The most famous example of a sealed bottle garden is David Latimer's bottle with a Spiderworth plant, pictured below, which has been sealed for 40 years. My own attempt at a bottle garden is failing ...
4
votes
1answer
57 views

Need for two oxygen sensors in E. coli

E. coli has two oxygen sensors: FNR (fumarate-nitrate reductase) and ArcBA (Anoxic Redox Control, two component control systems). FNR directly senses the oxygen, while the interaction of ArcB with ...
2
votes
3answers
3k views

Why would yeast grow but not produce alcohol?

I'm studying for my intro to microbiology test and I have a question asking why a culture of yeast responsible for producing alcohol would be growing, but not producing alcohol? The multiple choice ...
5
votes
1answer
5k views

Why don't animals produce alcohol

As I understand during anaerobic respiration, the electrons received from the decomposition of glucose are transferred to nicotinamide adenine dinucleotide and flavin adenine dinucleotide. As there is ...
6
votes
1answer
241 views

What's the biggest obligate anaerobic organism discovered till now?

Beside many anaerobic single cell organisms, there are some annelid worms that are obligate anaerobic at least in their early development stages. Probably, due to low concentration levels in nature, ...
7
votes
2answers
1k views

What effect does ambient temperature have on the cardiovascular system?

I am sorry if this is not appropriate for this site, but I think it fits so I am asking it here: I went for a run yesterday, and it was about -8⁰C. I was wearing a couple pairs of shorts, a t-shirt ...
14
votes
4answers
5k views

Where is the line between Anaerobic and Aerobic?

I am well aware of traditional anaerobic respiration (lactic acid or alcohol produced - no Krebs cycle) and traditional aerobic respiration (O2 is used at the end of the Citric acid cycle). I am ...
15
votes
2answers
24k views

Why is a lack of oxygen fatal to cells?

In animals temporary anaerobic respiration leads to the breakdown of the pyruvate formed by glycolysis into lactate. The buildup of lactate in the bloodstream is accompanied by a large number of ...