Unit 3 Target 2 (Part 1): DNA Vs RNA

8 Questions | Total Attempts: 897

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Unit 3 Target 2 (Part 1): DNA Vs RNA

Questions and Answers
  • 1. 
    The primary function of DNA is to
    • A. 

      Make proteins.

    • B. 

      Store and transmit genetic information.

    • C. 

      Control chemical processes withing cells.

    • D. 

      Prevent mutations.

  • 2. 
    All of the following are true about DNA except
    • A. 

      Short strands of DNA are contained in chromosomes inside the nucleus of a cell.

    • B. 

      Every DNA nucleotide contains a sugar, a phosphate group, and a base.

    • C. 

      DNA consists of two strands of nucleotides joined by hydrogen bonds.

    • D. 

      The long strands of nucleotides are twisted into a double helix.

  • 3. 
    Molecules of DNA are composed of long chains of 
    • A. 

      Amino acids.

    • B. 

      Fatty acids.

    • C. 

      Monosaccharides.

    • D. 

      Nucleotides.

  • 4. 
    Which of the following is not part of a molecule of DNA?
    • A. 

      Deoxyribose.

    • B. 

      Nitrogenous base.

    • C. 

      Phosphate.

    • D. 

      Ribose.

  • 5. 
    Refer to the illustration above.  The entire molecule shown in the diagram is called a(n)
    • A. 

      Amino acid.

    • B. 

      Nucleotide.

    • C. 

      Polysaccharide.

    • D. 

      Pyrimidine.

  • 6. 
    RNA differs from DNA in that RNA
    • A. 

      Is sometimes single-stranded.

    • B. 

      Contains a different sugar molecule.

    • C. 

      Contains the nitrogen base uracil.

    • D. 

      All of the above

  • 7. 
    RNA is chemically similar to DNA except that its sugars have an additional oxygen atom and the base thymine is replaced by a structurally similar base called
    • A. 

      Uracil.

    • B. 

      Alanine.

    • C. 

      Cytosine.

    • D. 

      Codon.

  • 8. 
    In RNA molecules, adenine is complementary to 
    • A. 

      Cytosine.

    • B. 

      Guanine.

    • C. 

      Thymine.

    • D. 

      Uracil.

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