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NISA [10]
3 years ago
12

Which of the following organic molecules may have up to 4 levels of structure

Biology
1 answer:
frutty [35]3 years ago
4 0
Proteins can - primary secondary tertoary and quaternary structures.
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1. Why is the ability to perform lactic acid fermentation important to an animal cell when oxygen is scarce?
erastovalidia [21]

Answer:

Fermentation is important can keep obtaining energy from glycolysis.

Explanation:

In the presence of oxygen, cells will use aerobic respiration to obtain energy in the form of ATP. In these conditions, it can produce up to 36 ATP molecules.

This process has three steps: glycolysis, citric acid cycle and electron transport chain.

During glycolysis, a glucose molecule is broken down into two pyruvate molecules, releasing electrons that are taken up by NAD+ which is converted into NADH, and producing a net total of 2 ATP molecules. The NADH produced during glycolysis and the citric acid cycle will go to the mitochondria and give away the electrons to start the electron transport chain that has Oxygen as the last electrons acceptor, and the NAD+ used to continue glycolysis is regenerated in the process.

In anaerobic conditions (no oxygen), the last electron acceptor is scarce, so the NADH can't give away its electrons and the NAD+ cannot be regenerated, so glycolysis stops, eventually causing cell death due to lack of ATP. To avoid this, cells perform lactic acid fermentation, where the NADH gives the electrons to pyruvate which is then converted into lactic acid. This regenerates the NAD+ necessary to continue glycolysis and keep obtaining some energy to survive until oxygen levels increase.

3 0
3 years ago
What will happen if a drought causes the population of grass to decrease?
Effectus [21]

Answer:

The other populations will decrease.

Explanation:

If the grass population decreases, then the grasshoper population will decreace, causing the mice population to decrease, which will lead to the decrease in owl population.

4 0
3 years ago
Read 2 more answers
I need help on This last question i need This done before I go To school I’ve retaken The photo since you guys couldn’t see it
Oduvanchick [21]

Answer:

b

Explanation:

3 0
4 years ago
En los seres humanos, hay cuatro (4) grupos sanguíneos: A, B, AB y O que son el resultado de la combinación de tres alelos
olganol [36]

Answer:.

Explanation:

6 0
3 years ago
Which of the following are not considered to be decomposers?
Fofino [41]
I’m pretty sure the answer is plants, sorry if it’s wrong!
7 0
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