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Maslowich
3 years ago
7

How can a mutation during DNA replication affect protein

Biology
1 answer:
Diano4ka-milaya [45]3 years ago
7 0
It could affect a protein a few different ways:

1. If you get a switch of one nucleotide for another, this could (but not always) result in a different amino acid being inserted than was supposed to. So, for example, you were supposed to insert a methionine at AUG of the mRNA, but the mutation resulted in GUG which now codes for valine. This may disrupt the activity in the protein - either in proper folding or if in the active site of an enzyme could disrupt the activity.

2. Other swaps of nucleotides can result in shortened proteins - so if you were supposed to have tyrosine inserted at UAU and that got switched to UAA which is a stop codon, then the protein is too short - and may not fold or function correctly. Depends where the mutation is of course.

3. Of course take that further and perhaps you were supposed to have a stop codon (UAA) and that got switched to UAU...so now instead of stopping the protein synthesis you instead insert a tyrosine and the protein continues to be extended until another stop codon is reached...that could be disastrous for the function of the protein as it probably won't fold properly. 
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The pedigree shows the inheritance of an autosomal recessive disorder. What is the genotype of Steve and Sonya's son?
FromTheMoon [43]

Answer:

The answer is pp

Explanation:

Steve and Sonya's son genotype is pp. Because an inheritance of autosomal recessive disorder  is with recessive allele responsible for the exceptional phenotype. In this case, Steve and Sonya are both heterozygotes, Pp, which means they both have a p allele  because each one gave the boy a p, contributing to affect his son. And since we are talking about inheritance of an autosomal disorder, we know that the parents phenotypic proportions are the same.

8 0
3 years ago
Elephants, who are important grazers, are instrumental in transforming woodlands into grasslands. This has a tremendous impact o
NeX [460]
The significance of elephants can be characterized as them being a Keystone species. Keystone species are usually considered to be species which have a extremely largy impact on a certain ecological niche or certain environment compared to their relative presence in that environment. In other words, while elephants aren't exactly the most numerous of species, they represent an important element of their environment which also effects other animals.
5 0
3 years ago
A bacterium was grown in two test tubes filled with media rich in glucose. One tube was sealed to produce anaerobic conditions,
amm1812

Answer:

The correct answer is: b. lightening of media in the unsealed tube only.

Explanation:

  • According to the question, the bacteria can undergo only aerobic respiration, that is it can produce its energy, that is, ATP, or adenosine triphosphate, only in the presence of oxygen.
  • The unsealed tube allowed air or oxygen to pass into it which can be used by the bacteria for its respiration. In the process, it will produce acid that will cause the media colour to lighten.
  • The sealed tube do not allow any oxygen to pass into it. As the given bacteria can undergo only aerobic respiration but not anaerobic respiration, in absence of oxygen it will not be able to undergo respiration and produce energy and acid. Hence, the media colour will remain unchanged.
  • The control tube is used to check the sterility of the media.
4 0
3 years ago
An eccentric millionaire botanist has offered a $25,000 scholarship to anyone who can successfully get a plant to grow through a
mars1129 [50]

Answer:

Option B, Apply auxin directly to the lower part of the stem opposite from the direction you want the stem to bend.

Explanation:

Options for the question are

A) Apply auxin directly to the shoot tip on the side to which you want the tip to bend.

B) Apply auxin directly to the lower part of the stem opposite from the direction you want the stem to bend.

C) Inject compounds that block auxin receptors into the part of the stem opposite from the direction you want the stem to bend.

D) Plant the roots in two different pots, and apply auxin to the root bucket that is on the same side as the direction you want the plant to bend.

Solution

Auxin is responsible for stem elongation by inhibiting growth of lateral buds. The movement of auxin is opposite to the direction of elongation of cells. Generally, Auxin moves to the dark side which is opposite to the direction i.e the lighter side in which cell elongate . Due to this growth pattern, the stem tip gets curved towards the light.  

Hence, option B is correct

4 0
4 years ago
Which explains how lightning is formed?
valentina_108 [34]

Answer:

two objects with the same electric charge rub together

Explanation:

4 0
2 years ago
Read 2 more answers
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