Choose the one most appropriate answer for each.
-X chromosome inactivation
A)Influences the amount and kinds of mRNA assembled from structural gene
B)Splicing, capping, and adding a poly-A tail
C)Nuclear envelope selectively regulates passage of transcripts
D)Phosphorylation of translated protein
E)Dosage compensation

Question

Quizplus · Accepted Answer

X chromosome inactivation is a type of dosage compensation in female mammals where one of the two X chromosomes in each cell is randomly inactivated to prevent overexpression of X-linked genes.

Answer: A
 X chromosome inactivation influences the amount and kinds of mRNA assembled from structural genes by regulating the expression of genes on the inactive X chromosome.

Answer: C
 The nuclear envelope selectively regulates the passage of transcripts by controlling the passage of molecules between the nucleus and the cytoplasm, including mRNA.

Answer: B
 Splicing, capping, and adding a poly-A tail are steps in the processing of pre-mRNA into mature mRNA.

Answer: D
 Phosphorylation of translated protein is a post-translational modification that can affect the activity, stability, and localization of proteins. It is not directly related to X chromosome inactivation.

Choose the One Most Appropriate Answer for Each