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kotykmax [81]
3 years ago
7

What event starts the Krebs Cycle?

Biology
2 answers:
Charra [1.4K]3 years ago
8 0

Answer:

Pyruvate (from glycolysis) is broken down and a two-carbon molecule bonded to Coenzyme A (acetyl-CoA) enters the Krebs cycle.

Explanation:

Volgvan3 years ago
7 0

Answer:

Pyruvate (from glycolysis)

Explanation:

Pyruvate is broken down and a two-carbon molecule bonded to Coenzyme A (acetyl-CoA) enters the Krebs cycle.

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1. Describe the differences between radiation, conduction, and convection.
kkurt [141]

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2. Earth receives energy from the sun, which is transferred between Earth and its atmosphere.

3.<span>Wildland fires, dust storms, and volcanic activity. They release CO2, CH4, N20, and sulfur dioxide.</span>

4. Burning coal, releases carbon dioxide and other pollutants. Gasoline, releases air pollution. Factories, releases carbon dioxide, methane, and nitrous oxide.

4 0
3 years ago
Read 2 more answers
Which of the following is NOT a carbohydrate?
vfiekz [6]
B is the answer to this question as Lipids are fats and are a whole separate macro molecule
8 0
3 years ago
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When DNA is compacted by histones into 10-nm and 30-nm fibers, the DNA is unable to interact with proteins required for gene exp
poizon [28]

Answer:

This is through the process of methylation and phosphorylation of histones tails.

Explanation:

The addition of   a methyl group  to the amino acid of the histones of the  nucleosomes   that compacted DNA  in the nucleus is  called mehtylation, while the addtion of phodpahte is phosphorylation

Its  effects  on  gene expression depends on the number of <u> methyl groups, and type of amino acid that  methylated. During transcription. </u>

<u />

The DNA double strands are compacted and therefore  hidden  from transcription factors and enzymes of transcription by the hitones  tails of the neuclosomes, Methylation  weaken the binding bonds between the tails and DNA structure ; thereby aiding the uncoiling of DNA  from the  tails.(nucleosomes).This chemical  reaction  aided  DNA  strands  exposure   to transcription factors and enzymes, for initiation of transcription. This explains the dyanmic activity of methylation

Futhermore phophorylation also favours unwrapping of DNA, by imitating   modifying enzymes e.g H3Y41E and H3T45E  and convert it to→→ H3Y41phopspahte to aid DNA unwrapping and accessibility to  transcription factors and RNA polymerase Enzymes,

5 0
3 years ago
I need the answer I’m kinda dumb
alukav5142 [94]

Answer:

I believe it’s D

Explanation:

It’s non renewable because it doesn’t regenerate

6 0
3 years ago
Need help :)) thankyou​
Margarita [4]

Answer:

wait why you need help?

Explanation:

JUST ASKING CAUSE I need to know why

4 0
2 years ago
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