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AP Biology Gene Expression — practice questions

Explore 92 free Gene Expression questions in AP Biology Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Gene Expression questions and exercises with answers

Showing questions 1–30 of 92.

A transcription factor binding site located on the same chromosome, right next to the gene it regulates, is described using a specific term. What is that term?Read the answer and worked solution →Find the outsider in each gene setRead the answer and worked solution →The human haploid genome contains about how many base pairs?Read the answer and worked solution →Friedrich Miescher named the phosphate-rich chemical from white blood cell nuclei:Read the answer and worked solution →Mice injected with heat-killed S strain plus live R strain died. Griffith's 1928 finding is called:Read the answer and worked solution →Avery, MacLeod and McCarty (1944) showed the transforming principle was:Read the answer and worked solution →Hershey and Chase labelled phage DNA with radioactive:Read the answer and worked solution →Chargaff's rules state that the amount of adenine equals the amount of:Read the answer and worked solution →Watson, Crick and Wilkins received the Nobel Prize in Medicine in:Read the answer and worked solution →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 →

Worked practice questions

A transcription factor binding site located on the same chromosome, right next to the gene it regulates, is described using a specific term. What is that term?

  1. A cis-acting element
  2. A trans-acting element
  3. An operator sequence
  4. A poly-A tail marker
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Correct answer: A. A cis-acting element

1. Transcription factors can bind to the promoter just upstream of the gene they regulate. 2. When this binding site is on the same chromosome just next to the gene, it is called a cis-acting element. 3. A trans-acting element instead describes a binding site found outside the promoter or on another chromosome. 4. An operator is a prokaryotic structure, and a poly-A tail is an RNA modification, so neither term fits this description. _Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 16 "Gene Expression", section The Promoter and the Transcription Machinery_

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Find the outsider in each gene set

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Questions
  1. Items
    1. Repressor
    2. Activator
    3. Inducer
    4. Enhancer
    Odd item
    Enhancer
  2. Items
    1. TFIID
    2. Dicer
    3. RISC
    4. miRNA
    Odd item
    TFIID
  3. Items
    1. Methyl group
    2. Poly A tail
    3. Acetyl group
    4. Phosphate group
    Odd item
    Poly A tail
  4. Items
    1. p53
    2. myc
    3. TATA box
    4. Cyclin B
    Odd item
    TATA box
Instructions
In each row of four, tap the one item that does not share the others' role.
_Source: OpenStax Biology 1e, section 16.1 Regulation of Gene Expression_

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The human haploid genome contains about how many base pairs?

  1. 3 billion
  2. 3 million
  3. 30 billion
  4. 300 million
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Correct answer: A. 3 billion

1. Each cell has 23 pairs of chromosomes. 2. The haploid genome holds 3 billion base pairs. 3. It has 20,000 to 25,000 functional genes. _Source: OpenStax Biology 2e, Chapter 14, DNA Structure and Function (CC BY 4.0)._

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