Problem:
Question 1: Antibody genes
A. contain both constant and variable regions.
B. are formed by cutting and splicing DNA in B cells during development.
C. are made from two heavy and two light chains, each of which has a variable region.
D. each recognize one antigen and are the only antibody made by their B cell.
E. All of these
Question 2: Heterochromatin is associated with
A. differential gene expression.
B. gene silencing.
C. mRNA translation.
D. heterozygotes.
E. all of these.
Provide the correct answer and justification for your choice.