AP Biology Unit 6 Exam

Which of the following are pyrimidines?

• adenine and cytosine

• adenine and guanine

• adenine and thymine

• cytosine and guanine

• cytosine and thymine

A nucleic acid contains 35% adenine, 36% thymine, 14% guanine, and 15% cytosine. This nucleic acid is

• single-stranded RNA

• single-stranded DNA

• double-stranded RNA

• double-stranded DNA

A nucleic acid consists of 29% cytosine, 35% uracil, 10% adenine, and 26% guanine. This nucleic acid is

• single-stranded RNA

• single-stranded DNA

• double-stranded RNA

• double-stranded DNA

Which is not a component of DNA nucleotides?

• Ribose sugar

• Phosphate

• Nitrogenous base

• Deoxyribose sugar

Eukaryotic DNA is located in

• the nucleus

• the cytoplasm

• anywhere in the cell

During transcription, what is the relationship between DNA and RNA?

• DNA is the template, RNA reads DNA in 3' -> 5' direction

• DNA is the template, RNA reads DNA in 5' -> 3' direction

• RNA is the template, DNA reads RNA in 3' -> 5' direction

• RNA is the template, DNA reads RNA in 5' -> 3' direction

What is the sequence of nucleotides on mRNA read in triplets called?

• anticodon

• codon

• triplet box

• wobble

Identify which molecules bind to the promoter region

• Ligase

• Topoisomerase

• DNA polymerase

• RNA polymerase

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 circular DNA

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

Describe the difference between the synthesis of the leading and lagging strands.

• directionality: leading = 3' -> 5', lagging = 5' -> 3'

• synthesis continuity: leading = discontinuous & lagging = continuous

• directionality: leading = 5' -> 3', lagging = 3' -> 5'

• synthesis continuity: leading = continuous & lagging = discontinuous