Biochemistry- Nucleic Acids

Question 1

What are the 2 pyrimidines found in DNA?

Answer 1

cytosine and thymine

Question 2

What are the 2 pyrimidines found in RNA?

Answer 2

uracil and cytosine

Question 3

What are the 2 purines found in RNA and DNA?

Answer 3

adenine and guanine

Question 4

Uric acid is the breakdown product of what substance?

Answer 4

Purine catabolism

Question 5

in DNA what are the 2 base pair combinations?

Answer 5

A-T, C-G

Question 6

Making RNA from DNA template is known as what?

Answer 6

transcription

Question 7

What are the 3 characteristic components of a nucleotide?

Answer 7

nitrogenous base, pentose sugar, phosphate group

Question 8

In de novo synthesis of purines, what is the starting material?

Answer 8

Ribose-5-phosphate

Question 9

Where does ribose-5-phosphate come from?

Answer 9

Hexose monophosphate shunt pathway

Question 10

A nuceotide minus the phosphate group is known as what?

Answer 10

nucleoside

Question 11

What is an important co-enzyme in purine and pyrimidine synthesis?

Answer 11

folic acid

Question 12

What is the name for the last enzyme in the production uric acid from purines?

Answer 12

Xanthine oxidase

Question 13

What are the precursors for pyrimidine synthesis?

Answer 13

Glutamine, CO2

Question 14

Where does pyrimidine and purine catabolism mainly occur?

Answer 14

liver

Question 15

Three consecutive base pairs are known as what?

Answer 15

codon

Question 16

what is the function of transfer RNA?

Answer 16

bring the correct amino acid in line with the correct codon during translation