I think the correct answer from the choices listed above is the last option. Some gaming marketers focus on <span>people in their 20s </span>of the population. Because they encourage these group to chill at times or rest after all the work done in a day. Hope this answers the question.
<span>When the Krebs cycle will not produce the energy needed</span>
Answer:

Option B is correct.
Explanation:
There are <u>thousands</u> of proteins and only 20 amino acids.
Hope I helped!
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Answer:The helix structure Of DNA helps prevent it from been expose and also the sugar and phoshate group that are important components of nucleotides forms a backbone on the helix structure or the polynucleotide this back bone is hydrophobic i.e water loving hence wouldn't allow for penetration for water.
2. Hydrogen bond is formed between this bases to keep them in place.
Explanation: