Bio111 Final Review

Which sequence of DNA bases would pair with this partiaal strand
ATG TGA CAG

• ATG TGA CAG
• TAC ACT GTC
• GTA AGT GAC
• CAT TCA CTG

What determines the code, or information, of a DNA molecule?

• the shape (structure) of the nitrogen bases
• the order (sequence) of the nitrogen bases
• the color of the nitrogen bases
• the frequency (number) of nitrogen bases

Tags

NGSS.HS-LS1-1

Which 2 molecules form the sides (backbone) of the DNA ladder?

• deoxyribose and adenine
• deoxyribose and a hydrogen bond
• deoxyribose and the nucleus
• deoxyribose and phosphate

Name this structure

• double helix
• nucelotide
• twisted ladder
• hydrogen bond

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-1

Helicase (opening the helix)

• catalyzes the synthesis of the RNA primer

• Breaks and rejoins the DNA double helix to relieve twisting forces caused by the opening of the helix

• stabilizes single-stranded DNA

• catalyzes the breaking of hydrogen bonds between base pairs to open the double helix by unwinding at the replication fork

Topoisomerase (opening the helix)

• Breaks and rejoins the DNA double helix to relieve twisting forces caused by the opening of the helix and so it can avoid super coiling

• catalyzes the breaking of hydrogen bonds between base pairs to open the double helix

• catalyzes the joining of Okazaki fragments into a continuous strand

• all of the above

DNA ligase (lagging-strand synthesis)

• catalyzes the breaking of hydrogen bonds between base pairs to open the double helix

• none of the above

• catalyzes the joining of Okazaki fragments into a continuous strand, re-anneals semi-conservative strands

• removes the RNA primer and replaces it with DNA

Why is DNA semiconservative?

• Because the new DNA molecule consist of 1 parental and 1 new DNA strand

• Because the new DNA molecule consist of 2 parental and 2 new DNA strands

• Because the new DNA molecule consist of reassembled parental and new strands

• Because the new DNA molecule fiscally conservative and socially progressive

Which enzyme is responsible for adding nucleotides?

• Topoisomerase

• DNA Polymerase

• Ligase

• Primase

RNA polymerase creates RNA in the _________ direction

• 5' to 3'
• 3' to 5'