DNA Structure and Base Pairing
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Questions and Answers

How many hydrogen bonds are formed between Cytosine and Guanine bases?

  • 4
  • 5
  • 3 (correct)
  • 2

    • What is the component of the DNA molecule that is shown in the diagram as 'H-C-H'?

  • Sugar molecule
  • Base pair
  • Deoxyribose (correct)
  • Phosphate group

    • Which of the following base pairs are joined by 2 hydrogen bonds?

  • T-C
  • A-T (correct)
  • A-G
  • C-G

    • What is the function of the phosphate group in the DNA molecule?

    <p>To connect the sugar molecule to the base</p> Signup and view all the answers

    Which of the following is NOT a base pair in the DNA molecule?

    <p>A-G</p> Signup and view all the answers

    What is the historical definition of a gene?

    <p>A functional and physical unit of heredity</p> Signup and view all the answers

    What is the primary function of most genes?

    <p>To contain the information for making a specific protein</p> Signup and view all the answers

    What is the composition of a gene?

    <p>Pieces of DNA</p> Signup and view all the answers

    What is the relationship between a gene and its inheritance?

    <p>A gene is passed from parent to offspring</p> Signup and view all the answers

    What is the term for a segment of DNA that codes for a protein?

    <p>Exon</p> Signup and view all the answers

    What is the primary component of the DNA backbone?

    <p>Sugar-phosphate</p> Signup and view all the answers

    Who discovered the structure of DNA?

    <p>Watson and Crick</p> Signup and view all the answers

    What is the approximate number of base pairs in human DNA?

    <p>3 x 10^9</p> Signup and view all the answers

    What is the complementary base pair of adenine (A)?

    <p>Thymine (T)</p> Signup and view all the answers

    What is the shape of the DNA molecule according to Watson and Crick's discovery?

    <p>Double helix</p> Signup and view all the answers

    What is the primary role of genes?

    <p>To possess and pass on a single characteristic</p> Signup and view all the answers

    Who is credited with introducing the concept of genes?

    <p>Gregor Mendel</p> Signup and view all the answers

    What was initially thought to carry genetic information?

    <p>Proteins</p> Signup and view all the answers

    What is the function of proteins in cells?

    <p>To perform the majority of the reactions of life</p> Signup and view all the answers

    When was it discovered that DNA carries genetic information?

    <p>In the mid-20th century</p> Signup and view all the answers

    What is a gene?

    <p>A small region of a chromosome</p> Signup and view all the answers

    What are chromosomes composed of?

    <p>Nucleotides</p> Signup and view all the answers

    What is the function of a gene?

    <p>To synthesize proteins</p> Signup and view all the answers

    What is the genetic code composed of?

    <p>A sequence of nucleotides</p> Signup and view all the answers

    What is the example of a gene given in the passage?

    <p>ATGCTACTTCACTGA</p> Signup and view all the answers

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