epigenetics

Question 1

gene expressions

Answer 1

means genes being turned on and off

Question 2

gene expresssions can be regulated by

Answer 2

chemical modification

Question 3

epigentics changes does not change

Answer 3

base sequence of DNA
and they are not like mutations

Question 4

epigenetic changes are caused by

Answer 4

• environmental factors
• heritable

Question 5

epigenome

Answer 5

all the chemical tags attached to the DNA and histones

Question 6

DNA and histones together is

Answer 6

chromatin

Question 7

when chromatin is tightly packed

Answer 7

DNA wrapped would be not accessible to RNA polymerase and transcription factors

Question 8

what happens if RNA polymerase cannot bind to the DNA

Answer 8

transcription cannot occur and gene will not be expressed

Question 9

whn chromatin is lossely packed

Answer 9

DNA wrapped is accessible to RNA polymerase and transcription factors,
therefore gene will be transcribed

Question 10

one method that is used to regulate gene expression by epigentic changes is

Answer 10

DNA methylation of DNA