Question

Part A.

True/False: All cells in an organism contain the same DNA

True/False: Insulators direct enhancers to interact with the intended promoter and block communication between enhancers and other promoters.

True/False: Epigenetic changes do not alter the DNA sequence.

True/False: X-Inactivation is not heritable.

Part B.

Give an example of regulation at the following steps of gene expression:

1. Transcriptional Regulation

2. mRNA processing

3. Regulation of mature mRNA

Answer 1

1, All cells in an organism contain the same DNA- True

Yes, all cells in an organism has the same DNA content, the difference occus in how it expresses the gene. Expression of gene changes according to the types and function of cells

2, Insulators direct enhancers to interact with the intended promoter and block communication between enhancers and other promoters.- true

Insulators does this function inorder to control the gene expression. they control the enhancer from expressing other promoters

3, Epigenetic changes do not alter the DNA sequence.- true

Epigenetc changes do not alter the sequences rather it is controls the on and off of gene expresssion in cells. It is said to be inherited

4, X-Inactivation is not heritable.- False

X-inactivation is an inherited epigenetic markers which is very important as it maintains same level of genes in both males and females