Exam 4 - Lecture 11 - Regulation of Gene Expression

Question 1

What are constitutive genes?

Answer 1

Genes that are expressed under ALL conditions in ALL cells

Question 2

What are inducible genes?

Answer 2

Genes that are only expressed if they are used or needed by a specific type of cell

Question 3

What is an example of inducible genes for skin cells?

Answer 3

Expression of keratin

Question 4

How are genes regulated at the transcription level?

Answer 4

Through regulating RNA synthesis

Question 5

True or false: Males are genetic mosaics

Answer 5

False, females are genetic mosaics

Question 6

What are histones?

Answer 6

Packaging proteins

Question 7

What is the nucleosome?

Answer 7

DNA wrapped around core nucleus of proteins
-histone octomer with DNA wrapped around it

The basic organizational unit of the chromosome

Question 8

What is meant by saying females are genetic mosaics?

Answer 8

It means different alleles of X-linked chromosomes are expressed in different cells