Exam One

Question 1

DNA is synthesized through a process called

Answer 1

semi-conservative replication

Question 2

What provides energy for the polymerization reactions in DNA synthesis?

Answer 2

Breaking down the hydrogen bonds between complementary DNA strands

Question 3

Leading strand

Answer 3

Synthesized in same direction as the movement of the replication fork

Question 4

Lagging strand

Answer 4

Synthesized in the opposite direction of replication fork

Question 5

Role of DNA ligase in the elongation of the lagging strand during DNA replication

Answer 5

Join Okazaki fragments

Question 6

Telomere

Answer 6

The ends of linear chromosomes

Question 7

RNA Polymerse

Answer 7

5’—>3’

Question 8

Codons

Answer 8

Part of the molecular structure of mRNA

Question 9

In gene regulation, which type pf control is the most efficient?

Answer 9

Transcriptional control

Question 10

Sigma

Answer 10

Helps RNA polymerse bind to promoters

Question 11

Inducer

Answer 11

Binds to repressor so repressor does not bind with operator

Question 12

Product of LacI gene

Answer 12

Repressor

Question 13

DNA Methalation

Answer 13

Slowing or stopping transcription, lock gene into off position

Question 14

Corepressor

Answer 14

Binds to repressors to prevent transcription and gene expression

Question 15

Enhancers

Answer 15

Increase the likelihood of transcription of a particulr gener occuring, located far from promoter

Question 16

Pleiotropy

Answer 16

Ability of a single allele to have multiple phenotypic effects

Question 17

Transcription

Answer 17

the process by which the information in DNA is copied into messenger RNA (mRNA) for protein production

Question 18

Function of Primase

Answer 18

The synthesis of the short section of RNA,

complementary to single-stranded DNA