ES123

23.11.2021 • 

Biology

4. Nebulin is an actin-binding protein that can be found in skeletal muscles. Nebulin is large in size and functions to stabilize actin and regulate muscle contractions. The gene that codes for nebulin, NEB, is on chromosome 2 in
humans. Mutations to the NEB gene can result in mutations in the amino acid sequence of the resulting nebulin
protein. If the mutation in the gene causes an amino acid deletion in the sequence of amino acids that make up
nebulin, how will this affect the structure of nebulin?
a. Only the primary structure of Nebulin will be affected; the secondary and tertiary structures will not be
affected.
b. Both the primary structure and secondary structure of nebulin will be affected, while the tertiary form will
not be affected.
c. The primary, secondary, and tertiary structures of nebulin will be affected.
d. An amino acid deletion would not affect the structure of nebulin.

Ответ:

onegirl435

25.07.2020

Biology

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Ans.

Albinism shows a genetic disorder, which is characterized by absence of coloration or pigmentation in individuals. It is an autosomal recessive disorder that transmits from parents to their offspring, when offspring receives both the mutated copies of gene responsible for albinism.

For a genetic disorder, dominant or wild type allele is represented by capital letter, such as 'A', while recessive or mutated allele is represented by small letter, 'a'. As 4th picture is representing male and female gametes with recessive alleles (a) , the resulting zygote will have both recessive alleles for albinism (aa), '4th zygote will develop into an albino child.'

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