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AP Biology DNA Structure and Function — practice questions — page 2

Explore 83 free DNA Structure and Function questions in AP Biology Biology. Open each question or exercise to read its content, reference answers and available explanation.

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DNA Structure and Function questions and exercises with answers

Showing questions 31–60 of 83.

Rosalind Franklin did not share the Nobel Prize because:Read the answer and worked solution →Adenine and thymine are held together by how many hydrogen bonds?Read the answer and worked solution →The two DNA strands run in opposite directions, described as:Read the answer and worked solution →One turn of the DNA helix measures 3.4 nm and contains how many base pairs?Read the answer and worked solution →A researcher measures the width of a DNA double helix, which is uniform throughout. She finds:Read the answer and worked solution →In prokaryotes, the single circular chromosome lies in a cytoplasm region called the:Read the answer and worked solution →Eukaryotic DNA wraps around histone proteins to form:Read the answer and worked solution →Meselson and Stahl's heavy nitrogen experiment supported which replication model?Read the answer and worked solution →E. coli's 4.6 million base pairs replicate in approximately:Read the answer and worked solution →The enzyme that unwinds DNA by breaking hydrogen bonds between bases is:Read the answer and worked solution →The strand synthesized in short Okazaki fragments away from the fork is the:Read the answer and worked solution →The repetitive six-base sequence in human telomeres is:Read the answer and worked solution →Blackburn, Greider and Szostak won the 2009 Nobel Prize for discovering:Read the answer and worked solution →DNA polymerase corrects wrong bases as it adds them through:Read the answer and worked solution →An insertion or deletion that alters the reading frame is a:Read the answer and worked solution →Catch the replication enzymesRead the answer and worked solution →Pop the DNA scientistsRead the answer and worked solution →Run the double helixRead the answer and worked solution →Slice the DNA wordsRead the answer and worked solution →Purine or pyrimidineRead the answer and worked solution →Sort the replication strandsRead the answer and worked solution →Type the numberRead the answer and worked solution →DNA bingoRead the answer and worked solution →Which geneticist wrote that nothing makes sense in biology except in the light of evolution?Read the answer and worked solution →Which ancient Greek philosopher emphasized that species were static and unchanging?Read the answer and worked solution →Which Scottish geologist proposed that geological change accumulates gradually over long periods?Read the answer and worked solution →Darwin traveled around the world on HMS Beagle from:Read the answer and worked solution →The Galapagos Islands, where Darwin studied finches, lie west of:Read the answer and worked solution →Darwin noted seed-eating finches had which kind of beak?Read the answer and worked solution →Darwin's three principles behind natural selection: traits are inherited, more offspring are produced than survive, and:Read the answer and worked solution →

Worked practice questions

Rosalind Franklin did not share the Nobel Prize because:

  1. She left science
  2. She had died
  3. She refused it
  4. She was a chemist
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Correct answer: B. She had died

1. Her X-ray diffraction data underpinned the model. 2. She had died by 1962. 3. Nobel prizes are not awarded posthumously. _Source: OpenStax Biology 2e, Chapter 14, DNA Structure and Function (CC BY 4.0)._

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Adenine and thymine are held together by how many hydrogen bonds?

  1. Ten
  2. One
  3. Two
  4. Six
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Correct answer: C. Two

1. Cytosine and guanine form three. 2. Adenine and thymine form two. 3. Base pairs are stabilised by these bonds. _Source: OpenStax Biology 2e, Chapter 14, DNA Structure and Function (CC BY 4.0)._

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The two DNA strands run in opposite directions, described as:

  1. Bidirectional
  2. Concentric
  3. Perpendicular
  4. Antiparallel
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Correct answer: D. Antiparallel

1. The 3 prime end of one faces the 5 prime end of the other. 2. The strands are antiparallel. 3. Sugar and phosphate form the backbone. _Source: OpenStax Biology 2e, Chapter 14, DNA Structure and Function (CC BY 4.0)._

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