Molecular Biology Basics

Question 1

Why are promoters usually AT-rich?

Accepted Answer

A-T bonds are weaker

Question 2

The RNA transcript is complementary to which DNA strand?

Accepted Answer

Non-template; template

Question 3

True or false: RNA polymerase can unwind DNA.

Accepted Answer

True

Question 4

What is different between prokaryotic and eukaryotic transcription?

Accepted Answer

Both a and b are correct, Primary RNA transcript is final mRNA, Transcription occurs simultaneously

Question 5

What is needed for eukaryotic transcription initiation?

Accepted Answer

DNA template with promoter

Question 6

What do nucleic acids include?

Accepted Answer

DNA and RNA

Question 7

Which model describes DNA structure?

Accepted Answer

Double helix

Question 8

True or false: DNA strands run parallel to each other.

Accepted Answer

False

Question 9

What direction is the DNA template read during transcription?

Accepted Answer

3' to 5'; 5' to 3'

Question 10

What are the percentages of nucleotides if A is 10%?

Accepted Answer

20% T, 40% G, 40% C

Question 11

What associates with RNA polymerase during RNA polymerization?

Accepted Answer

Nucleoside triphosphate

Question 12

What is the central dogma of molecular biology?

Accepted Answer

Both transcription and translation

Question 13

What are the roles of the 5' cap and 3' poly A tail?

Accepted Answer

Protect RNA and provide stability, Help during translation process

Question 14

What is the complementary DNA strand for 5'-AGCTATA-3'?

Accepted Answer

3'-TCGATAT-5'

Question 15

What is the percentage of bases in complementary RNA transcript?

Accepted Answer

5% U, 10% C, 12% G, 15% A

Question 16

What steps are needed for RNA processing?

Accepted Answer

5' cap added, Introns removed, exons joined, All choices are correct, 3' poly A tail added

Question 17

How do RNA nucleotides differ from DNA nucleotides?

Accepted Answer

Uracil instead of thymine, Both a and b are correct, Ribose instead of deoxyribose

Questions 17