AP Biology Unit 6 Review

Which of the following sequences in double-stranded DNA is most likely to be recognized as a cutting site for a restriction enzyme?

• AAGG

  TTCC

• AGTC

  TCAG

• GGCC

  CCGG

• ACCA

  TGGT

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

For double-stranded DNA, consider the following base ratios:

1. A/G
2. C/T
3. C/G
4. (A+C)/(G+T)
5. (A+G)/(C+T)
6. (A+T)/(G+C)

Which of those ratios always equals 1?

• 1 and 2

• 4 and 6

• 3,4, and 5

• 1,4, and 5

• 3 and 6

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

Double-stranded DNA has ________ bonds in-between base pairs, and _________ bonds that make up the sugar-phosphate backbone.

• hydrogen, covalent

• covalent, hydrogen