Question

Which type of chemical modification of a protein has the widest variety of activities?

A. methylation

B. phosphorylation

C. acetylation

D. ubiquitination

E. hydroxylation

Stabilizing selection happens when

A. the phenotypic extremes of a population are more likely to survive

B. females prefer to mate with a specific extreme phenotype

C. the intermediate phenotype of a population is more likely to survive

D. females have to mating preference

Answer 1

Answer 1. phosphorylation

This is the most common post translational modification in protein and it occurs in higher numbers. Phosphorylation of any protein or enzyme leads to activation or inactivation of them.

This reaction involved in various kind of cellular activities, cell signalling, signal transduction and metabolic process.

2. option c is correct.

In the stabilizing selection the middle level of every character is selected. Both lower and higher extremes are eliminated and in stabilizing selection the middle character or phenotype is selected.