DNA, Replication, RNA, Transcription

15 Questions | Total Attempts: 247

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DNA, Replication, RNA, Transcription

Questions and Answers
  • 1. 
    How many DNA molecules are in a human cell?
    • A. 

      46

    • B. 

      23

    • C. 

      2

    • D. 

      52

  • 2. 
    The backbone of a DNA molecule is made up of:
    • A. 

      Sugars and phosphates

    • B. 

      Base-pairs

    • C. 

      Adenosine triphosphate

    • D. 

      Enzymes

  • 3. 
    In a DNA molecule, none of the following base-pairs are possible, EXCEPT:
    • A. 

      Cytosine - Adenine

    • B. 

      Guanine - Cytosine

    • C. 

      Thymine - Uracil

    • D. 

      Adenine - Guanine

  • 4. 
    All of the following are part of a DNA nucleotide, EXCEPT:
    • A. 

      A ribose sugar

    • B. 

      A deoxyribose sugar

    • C. 

      A nitrogenous base

    • D. 

      A phosphate group

  • 5. 
    The building blocks of nucleic acids are called:
    • A. 

      Nucleotides

    • B. 

      Nucleosomes

    • C. 

      Nucleozymes

    • D. 

      Nucleoforms

  • 6. 
    All of the following are differences between DNA and RNA except:
    • A. 

      DNA is double-stranded, and RNA is single-stranded.

    • B. 

      DNA nucleotides include deoxyribose and RNA nucleotides include ribose.

    • C. 

      In RNA, the base uracil replaces thymine normally found in DNA.

    • D. 

      DNA has a sugar-phosphate backbone, but RNA does not.

  • 7. 
    A chromosome is formed when a DNA molecule wraps around proteins called:
  • 8. 
    What is the name of this molecule?
    • A. 

      ATP

    • B. 

      DATP

    • C. 

      Adenine RNA nucleotide

    • D. 

      Adenine DNA nucleotide

  • 9. 
    Which of the following is the weakest bond in a DNA molecule?
    • A. 

      Bond between nitrogenous bases

    • B. 

      Bond between phosphate group and 3' carbon

    • C. 

      Bond between phosphate group and 5' carbon

    • D. 

      Bond between 1' C and Oxygen in the sugar molecule

  • 10. 
    Which of the following is related to the process of transcription?
    • A. 

      RNA polymerase

    • B. 

      Thymine RNA nucleotide

    • C. 

      Helicase

    • D. 

      Okazaki fragments

    • E. 

      3' to 5' sequence

  • 11. 
    Which of the following pairs contains two pyrimidines?
    • A. 

      Guanine and adenine

    • B. 

      Guanine and cytosine

    • C. 

      Adenine and thymine

    • D. 

      Cytosine and thymine

  • 12. 
    After RNA is transcribed from the DNA, RNA splicing removes ______________ to form mRNA.
  • 13. 
    Which of the following is NOT true of a gene?
    • A. 

      A gene is a segment of a DNA molecule.

    • B. 

      A gene contains coded information for construction of a particular protein.

    • C. 

      Ribosomes use genes to make proteins.

    • D. 

      The beginning of a gene is signified by a promoter like the "TATA box."

  • 14. 
    Which of the following correctly labels parts A, C, and D. 
    • A. 

      A) origin of replication, C) DNA Polymerase, D) leading strand

    • B. 

      A) replication fork, C) DNA Polymerase, D) leading strand

    • C. 

      A) helicase, C) ligase, D) lagging strand

    • D. 

      A) replication fork, C) DNA Polymerase, D) Okazaki fragment