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creativ13 [48]
3 years ago
7

Enzymatic breakdown of which of the following compounds doesn’t begin until it reaches the stomach?

Biology
1 answer:
ahrayia [7]3 years ago
5 0

Answer:

B. Proteins

Explanation:

Salivary amylase is an enzyme that starts the breakdown of starch in the mouth. Gastric glands of the stomach secrete gastric juice, which contains HCl to kill bacteria and denatures proteins, intrinsic factors, and the enzyme pepsin. The chief cells of gastric glands secrete pepsinogen (an inactive form of pepsin).

Pepsin begins the digestion of proteins in the stomach. It breaks down certain peptide bonds between amino acids and thereby, breaks down protein chain into smaller peptide fragments. Pepsin requires a very acidic environment of the stomach (pH 2) and becomes inactive at a higher pH.

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What occurs during frameshift mutation?
yuradex [85]

Answer:

C) An extra chromosome is added, causing mismatching of the chromosome pairs.

Explanation:

Mutation is any change, whether big or small, that occurs in the nucleotide sequence of a gene. Mutation can be of different types depending on how it occurs.

According to the question, frameshift mutation is a mutation that causes the normal reading frame of the nucleotide sequence to be altered. It is caused when an extra chromosome is added (insertion) or when one chromosome is removed (deletion). In either way, there will be a mismatch or alteration in the chromosome pair, hence affecting the reading of the nucleotide sequence.

In frameshift mutation, the insertion or deletion causes the

normal CODONS (triplet nucleotide) to be missing or incomplete, hence, disrupts the manner at which the reading takes place (reading frame). Note, frameshift mutation only occurs as a result of insertion or deletion of chromosomes/bases that are not multiples of three that can maintain the normal reading pattern/frame.

3 0
3 years ago
What are 5 things that are important to know about biology for a final on 1 semester ?
Zepler [3.9K]
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4 0
3 years ago
A student would like to determine how heating a liquid changes its volume. The student hypothesizes that the liquid will increas
frez [133]

Answer:

B.  The volume of the liquid should be measured before it is heated.

Explanation:

A student made serious mistake that he did not measure the volume of the liquid before heating.

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The initial hypothesis of the student shows that he wants to know the change in volume, so it is inevitable to calculate the initial volume to know the difference after the completion of experiment.

<em>All other options seem less appropriate than Option B, therefore B is the right answer.</em>

I hope it help!

8 0
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Answer:

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2)The relative electronegativity of an element

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