AP Bio Unit 6-Dr. A

What happens when lactose attaches to the repressor?

• The repressor is removed and RNA Polymerase will transcribe the genes.

• The CAP will be removed and RNA Polymerase will be blocked from transcribing.

• The lac genes will be removed as introns.

• The pre-mRNA will be edited to a mature mRNA transcript.

What is the purpose of the repressor in the operon pathway?

• promote transcription of the genes

• prevent wasting resources when the proteins are not needed

• stimulate the RNA polymerase production

• remove telomeres from the ends of the chromosome

Whose DNA was found at the crime scene?

• Victim

• Suspect 1

• Suspect 2

• Suspect 3

Which of the following would cause a frameshift mutation in the following coding sequence?

5' GAC TTC GTA CCG TGA CTC 3'

• substituting the first C for a T

• reversing the TTC to read CTT

• deleting the eighth nucleotide in the sequence

• deleting the last C

How does the DNA in a prokaryote differ from a eukaryote?

• Prokaryote has circular DNA, Eukaryotes has linear DNA

• Prokaryote has single stranded DNA, Eukaryotes has double stranded DNA

• Prokaryote has linear DNA, Eukaryotes has prokaryote DNA

• Prokaryote has double stranded DNA, Eukaryotes has single stranded DNA

Identify which of the following best describes purines and pyrimidines.

• Purines (C, T, & U) have single ring, Pyrimidines (A & G) have double ring

• Purines (C, T, & U) have double ring, Pyrimidines (A & G) have single ring

• Purines (A & G) have single ring, Pyrimidines (C, T, & U) have double ring

• Purines (A & G) have double ring, Pyrimidines (C, T, & U) have single ring

Which of the following demonstrates base pairing rules to 5' - CAGGT - 3'

• 3' - TGGAC - 5'

• 3' - GTCCA - 5'

• 5' - GTCCA - 3'

• 5' - CAGGT - 3'

Which is not a component of DNA nucleotides?

• Ribose sugar

• Phosphate

• Nitrogenous base

• Deoxyribose sugar

Nitrogenous bases are joined by which type of bond?

• polar bonds
• ionic bonds
• covalent bonds
• hydrogen bonds

Which of the following help(s) to hold the DNA strands apart while they are being replicated?

• RNA primase
• single–strand binding proteins
• DNA polymerase I
• DNA ligase