AP Bio Review 3

Which enzyme is responsible for relaxing supercoiling in front of the replication fork?

• helicase

• DNA polymerase

• topoisomerase

• ligase

Which enzyme is requires RNA primers to initiate DNA synthesis?

• helicase

• DNA polymerase

• topoisomerase

• ligase

How do the three types of RNA work together?

• mRNA carries message, tRNA carries amino acids, and rRNA makes ribosome

• mRNA makes ribosomes, tRNA carries amino acids, and rRNA relays information

• mRNA carries amino acids, tRNA transfer message, and rRNA makes ribosome

• mRNA is made, tRNA holds the DNA in place, and rRNA removes the deoxyribose

Which of the following are NOT post-transcriptional modifications?

• 5' cap

• intron removal

• poly-A tail

• TATA box

Identify which molecules bind to the promoter region

• Ligase

• Topoisomerase

• DNA polymerase

• RNA polymerase

What are the three components of a nucleotide?

• sugar, hydrogen, nitrogenous base

• sugar, oxygen, nitrogenous base

• sugar, phosphate group, nitrogenous base

• sugar, phosphate group, protein

Burt was looking at a nucleic acid and noticed the following:

it was a double helix, it had the bases thymine, adenine, cytosine, guanine, and it had a 5 carbon sugar. The nucleic acid was...

• DNA

• RNA

• could have been either DNA or RNA

• there was not enough information to tell which nucleic acid it was

What mutation has occurred here? 
T-G-A-C-C-A
T-G-A-G-C-A

• Substitution
• Deletion
• Insertion
• Frameshift 

Tags

NGSS.HS-LS3-2

Name the mutation: a substitution that results in an early stop codon instead of an amino acid is known as

• missense

• nonsense

• frameshift

• silent

Tags

NGSS.HS-LS3-2

Name the mutation: A type of substitution in which no amino acids are changed.

• Missense

• Nonsense

• Silent

• Deletion