AP Biology Unit 6 Exam

Which of the following best describes a DNA molecule?

• antiparallel double helix

• contains ribose

• made of amino acids

• contains Uracil

Tags

NGSS.HS-LS1-1

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

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

Seals the Okazaki fragments together

• DNA Polymerase
• ligase
• helicase
• primase

This repetitive sequences of DNA on the ends of chromosomes (TTAGGG) for protection.

• telomeres

• telomerase

• Okazaki fragments

• primer

Which enzyme is needed to start DNA replication?

• DNA Polymerase
• Topoisomerase
• Ligase
• Primase

What is meant by the description "antiparallel" regarding the strands that make up DNA?

• The twisting nature of DNA creates nonparallel strands.
• One strand is positively charged and the other is negatively charged.
• The 5' to 3' direction of one strand runs counter to the 5' to 3' direction of the other strand.
• Base pairings create unequal spacing between the two DNA strands

What is meant that DNA replication follows a “semi-conservative” model?

• After DNA replication, each strand contains one side that is a parental strand and the other side is a daughter strand.
• After DNA replication, one completed strand contains only parental DNA while the other contains only daughter DNA.
• None of these identify the “semi-conservative” model.
• After DNA replication, one completed strand contains a mixture of both parental DNA and daughter DNA dispersed throughout the strand.

Where does transcription occur in eukaryotic cells?

• Nucleus
• Ribosome
• Cytoplasm
• Rough E.R.

What is the complementary tRNA anticodon to the following mRNA codon: AUG

• UAC
• TAC
• ATG
• AAC

Transcribe the following DNA sequence:

TAT GGC ACT

• TAT GGC ACT

• ATA CCG TGA

• AUA CCG UGA

• UAU GGC ACU

Tags

NGSS.HS-LS1-1