5- Damage to DNA caused by ultraviolet radiation can be repaired by

6- Xeroderma pigmentosum results from a defect in

7- All of the following statements about Xeroderma pigmentosum are true except

1- Mutations can be caused by

2- Substitution of an adenine base by guanine in DNA is known as

3- Substitution of a thymine base by adenine in DNA is known as

4- A point mutation results from

5- Substitution of a base can result in a

6- A silent mutation is most likely to result from

7- The effect of a missense mutation can be

8- Amino acid sequence of the encoded protein isn't changed in

9- Hemoglobin S is an example of a /an

10- If the codon UAC on mRNA changes into UAG as a result of a base Substitution in DNA, it will result in

11- Insertion of a base in a gene can cause

12- A frameshift mutation changes the reading frame because the genetic code

13- From DNA the genetic message is transcribed into this compound :

14- In the following partial sequence of mRNA, a mutation of the template DNA results in a change in codon 91 to UAA the type of mutation is

1- In the process of transcription in bacterial cells

2- The correct statement concerning RNA and DNA polymerase is