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Review Questions

BiologyReview Questions


If DNA of a particular species was analyzed and it was found that it contains 27 percent A, what would be the percentage of C?

  1. 27 percent
  2. 30 percent
  3. 23 percent
  4. 54 percent

The experiments by Hershey and Chase helped confirm that DNA was the hereditary material on the basis of the finding that:

  1. radioactive phage were found in the pellet
  2. radioactive cells were found in the supernatant
  3. radioactive sulfur was found inside the cell
  4. radioactive phosphorus was found in the cell

DNA double helix does not have which of the following?

  1. antiparallel configuration
  2. complementary base pairing
  3. major and minor grooves
  4. uracil

In eukaryotes, what is the DNA wrapped around?

  1. single-stranded binding proteins
  2. sliding clamp
  3. polymerase
  4. histones

Meselson and Stahl's experiments proved that DNA replicates by which mode?

  1. conservative
  2. semi-conservative
  3. dispersive
  4. none of the above

If the sequence of the 5'-3' strand is AATGCTAC, then the complementary sequence has the following sequence:

  1. 3'-AATGCTAC-5'
  2. 3'-CATCGTAA-5'
  3. 3'-TTACGATG-5'
  4. 3'-GTAGCATT-5'

Which of the following components is not involved during the formation of the replication fork?

  1. single-strand binding proteins
  2. helicase
  3. origin of replication
  4. ligase

Which of the following does the enzyme primase synthesize?

  1. DNA primer
  2. RNA primer
  3. Okazaki fragments
  4. phosphodiester linkage

In which direction does DNA replication take place?

  1. 5'-3'
  2. 3'-5'
  3. 5'
  4. 3'

The ends of the linear chromosomes are maintained by

  1. helicase
  2. primase
  3. DNA pol
  4. telomerase

During proofreading, which of the following enzymes reads the DNA?

  1. primase
  2. topoisomerase
  3. DNA pol
  4. helicase

The initial mechanism for repairing nucleotide errors in DNA is ________.

  1. mismatch repair
  2. DNA polymerase proofreading
  3. nucleotide excision repair
  4. thymine dimers
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