INTRODUCTION TO MICROSCOPY CELL BIOLOGY
DIFFERENTIATED CELL
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
Through the process of cell differentiation, what happens to the DNA?
|
|
Some genes are turned on and some are turned off
|
|
|
All genes must be turned on
|
|
|
All genes must be transcribed and then translated
|
|
|
Body cells turn into stem cells
|
Explanation:
Detailed explanation-1: -The process of turning genes on and off is known as gene regulation. Gene regulation is an important part of normal development. Genes are turned on and off in different patterns during development to make a brain cell look and act different from a liver cell or a muscle cell, for example.
Detailed explanation-2: -When a gene is turned off, it no longer provides the directions for making proteins. This means that the proteins needed to fulfill a particular job–say, tolerate lactase–aren’t produced.
Detailed explanation-3: -A gene is switched “on” when the portion of chromatin where it is located “opens.” This process involves proteins that add little chemical modifications to histones or to the DNA.
There is 1 question to complete.