8.4

Question 1

Which of these have negative or positive transcription factors.

1. Increased concentration of positive TF
2. decreased affinity of positive TF for DNA
3. Increase in protein degradation

4.Increased affinity of polymerase to DNA

5.Decreased concentration of mRNA Destroyer

Answer 1

1. positive
2. Negative
   3.Negative
   4.positive
   5.positive

Question 2

Affinity means

Answer 2

Attraction between molecules.

Question 3

What is the role of each of these in translation
1.mRNA
2.tRNA
3.rRNA

Answer 3

1. acts as the template that carries the genetic information from DNA to the ribosomes
2. joins with their complementary codons.
   3.help translate the information in mRNA into protein.

Question 4

what is mutation

Answer 4

Change in the base sequence in a molecule of DNA

Question 5

TAC to TAG is a example of
Tyr Stop

Answer 5

point, nonsense

Question 6

CCC to ACC is an example of
Pro Thr

Answer 6

point missence