If a mutation causes a permanent change in the DNA sequence, how is it that most mutations are “silent” mutations?

Biology

1 answer:

IgorLugansk [536]2 years ago

7 0

Answer:

(look at the explanation below)

Explanation:

A mutation is a change that occurs in our DNA sequence, either due to mistakes when the DNA is copied or as the result of environmental factors such as UV light and cigarette smoke. Mutations can occur during DNA replication if errors are made and not corrected in time.

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Researchers investigated the effect of urea on the three-dimensional structure of a certain enzyme. The researchers dissolved th

makkiz [27]

Answer:

Function will be disrupted by adding the urea and regained by removing the urea.

Explanation:

The protein is one of the important biomolecule made of the polymers of the alpha amino acids that are linked together by peptide bonds. The protein works at their specific pH.

Denaturants disrupt the 3 dimensional structure of protein that affect their normal functioning. In the given experiment, the urea acts as denaturant and disrupt the protein structure. The removal of urea will reverse the denaturant condition and protein gain its function.

Thus, the correct answer is option (a).

8 0

3 years ago

The-attraction of the positive side of one water

Anna71 [15]

Answer:

B = hydrogen bonding

Explanation:

The water molecule consist of two hydrogen atom one oxygen atom. There is large electronegativity difference between oxygen and hydrogen. Both atoms are bonded through covalent bonds.

Covalent bond:

It is formed by the sharing of electron pair between bonded atoms.

The atom with larger electronegativity attract the electron pair more towards it self and becomes partial negative while the other atom becomes partial positive.

For example:

In water the electronegativity of oxygen is 3.44 and hydrogen is 2.2. That's why electron pair attracted more towards oxygen, thus oxygen becomes partial negative and hydrogen becomes partial negative. The partial positive end of one water molecule attracted towards the partial negative end of other moleucle. The attraction between them is called hydrogen bonding. In this way large mole are connected with each other. Hydrogen bonding is actually a weak bonding.

3 0

3 years ago

In Drosophila, genes a and b control body size and color, respectively. Large body (a+) is dominant over miniature (a), and gray

frutty [35]

Answer:

Female gametes:

ab= 0%

ab+=0%

a+b=0%

a+b+=0%

for the miniature phenotype to occur, it is necessary to contain two recessive characters and the female must have both for it to occur, if it is homozygous for b + it will have 2 alleles b +, understanding that the female is aab + b it will only occur gametes ab +

2. Phenotype

Miniature body + gray=25%

Large body +gray = 50%

Large body +ebony = 25%

Miniature body +ebony =0%

As the crossing cannot occur in males, the gametes it can produce are: ab + and a + b. Although the crossing can occur in women. The gametes produced are: ab +, a + b, ab and a + b +.

the crossing occurs only in the females generating the gametes ab +, a + b, ab and a + b +

The genotypes corresponding to:

Punnet graphic

large gray body: a + ab + b, a + ab + b +, a + a + b + b

big body and ebony: a + a + bb, a + abb

miniature and gray body: aab + b +, aab + b