ACE Your Biology Exam - Biology Mock Test About RNA And Protein Synthesis

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ACE Your Biology Exam - Biology Mock Test About RNA And Protein Synthesis

Protein synthesis is the process in which cells make proteins. It occurs in two stages: transcription and translation. Transcription is the transfer of genetic instructions in DNA to mRNA in the nucleus. It includes three steps: initiation, elongation, and termination. Ace Your Biology Exam by passing Biology Mock Test about RNA and Protein Synthesis


Questions and Answers
  • 1. 
    What are the missing nucleotides (1), (2), (3) and (4) respectively in the following figure?
    • A. 

      U – A – C – G

    • B. 

      A – A – C – G

    • C. 

      A – U – G – C

    • D. 

      A – A – G – C

  • 2. 
    What is the number of amino acids produced by mRNA of a certain virus that its nucleic acid consists of 1800 base pairs, knowing that the whole molecule represents a genetic code?
    • A. 

      600

    • B. 

      599

    • C. 

      601

    • D. 

      More than 601

  • 3. 
    Bacteria produce ---------- when infected by a Bacteriophage.
    • A. 

      Restriction enzymes then ligase enzymes

    • B. 

      Modified enzymes then polymerase enzymes

    • C. 

      Restriction enzymes then modified enzymes

    • D. 

      Modified enzymes then restriction enzymes

  • 4. 
    What is the number of nucleotides of a DNA molecule that contains two complete turns?
    • A. 

      10

    • B. 

      20

    • C. 

      30

    • D. 

      40

  • 5. 
    The maximum number of different genetic codes for amino acids on mRNA is …...
    • A. 

      3

    • B. 

      20

    • C. 

      61

    • D. 

      64

  • 6. 
    For the formation of a protein consists of 300 amino acids, then the number of turns of the DNA molecule which is going to be transcribed is ……
    • A. 

      30

    • B. 

      90

    • C. 

      15

    • D. 

      45

  • 7. 
    The pores in the nuclear membrane transfer -------- to the cytoplasm
    • A. 

       Ribosomes

    • B. 

       tRNA

    • C. 

       mRNA

    • D. 

       All the previous

  • 8. 
    The ------- is responsible for reading the language of the amino acids and nucleotides.
    • A. 

      Transfer RNA

    • B. 

      RNA polymerase

    • C. 

      Messenger RNA

    • D. 

      Ribosome

  • 9. 
    The codon is three successive nucleotides found on ……….
    • A. 

      DNA

    • B. 

      Messenger RNA

    • C. 

      Transfer RNA

    • D. 

      Ribosome

  • 10. 
    A recombinant DNA molecule is produced by .....
    • A. 

      Joining of two DNA fragments of the same organism.

    • B. 

      Joining of more than two DNA fragments of the same organism.

    • C. 

      Joining of two DNA fragments originating from different organisms.

    • D. 

      Joining two mRNA molecules.

  • 11. 
    Which of the following statements are true regarding recombinant-DNA technology?
    • A. 

      Is used to obtain large number of copies of specific DNA fragments

    • B. 

      Is used to obtain large quantities of the protein produced by the concerned gene

    • C. 

      Is used to integrate gene of interest into chromosomes where it expresses itself

    • D. 

      All of them

  • 12. 
    Which of the following enzymes in bacteria are responsible for restricting the growth of viruses?
    • A. 

      Reverse transciptase

    • B. 

      Restriction endonuclease

    • C. 

      Peptidyl transferase

    • D. 

      Ligases

  • 13. 
    Which enzyme is used to join together two different types of DNA molecules?
    • A. 

      Ligase

    • B. 

      Endonuclease

    • C. 

      Gyrase

    • D. 

      Peptidyl transferase

  • 14. 
    How many DNA double strands are obtained from one DNA double strand after 4 cycles in PCR?
    • A. 

      4

    • B. 

      8

    • C. 

      16

    • D. 

      32

  • 15. 
    At what temperature do denaturation of DNA double helix takes place in the PCR?
    • A. 

      60˚

    • B. 

      54˚

    • C. 

      74˚

    • D. 

      94˚

  • 16. 
    At what temperature do annealing of DNA and primer takes place in PCR?
    • A. 

      42˚

    • B. 

      54˚

    • C. 

      74˚

    • D. 

      96˚

  • 17. 
    Which of the following is a mismatch?
    • A. 

      Polymerase – Taq polymerase

    • B. 

      Template – double stranded DNA

    • C. 

      Primer – small number of nucleotides

    • D. 

      Synthesis – 5’ to 3’ direction

  • 18. 
    Which of the following is true about DNA hybridization and species relatedness?
    • A. 

      The more similar the DNA, the higher the DNA melting temperature

    • B. 

      The less similar the DNA, the more hydrogen bonds will be formed

    • C. 

      Unrelated species are more likely to share genetic similarities

    • D. 

      Only species living in the same region will have similar DNA

  • 19. 
    Which of the following is a use for DNA hybridization?
    • A. 

      To look for species' relatedness

    • B. 

      To look for changes in gene expression

    • C. 

      To understand the mechanisms of evolution in isolated populations

    • D. 

      To decrease genetic mutation in a population

  • 20. 
    Conversion of messages carried by mRNA into amino acid sequences is called________.
    • A. 

      Replication

    • B. 

      DNA repair

    • C. 

      Translation

    • D. 

      Transcription

  • 21. 
    Name the suppressor which blocks translation in eukaryotes?
    • A. 

      Stop codon

    • B. 

      Releasing factor

    • C. 

      Terminator

    • D. 

      Poly-adenine tail

  • 22. 
    A section in the nucleic acid marks the end of a gene during transcription process .....
    • A. 

      Promoter

    • B. 

      Terminator

    • C. 

      Releasing factor

    • D. 

      RNA polymerase

  • 23. 
    What is the role of mRNA in protein synthesis?
    • A. 

      It translates genetic code to a specific amino acid.

    • B. 

      It modifies mRNA molecules prior to protein synthesis.

    • C. 

      It provides a genetic map for the protein.

    • D. 

      It catalyzes the process.

  • 24. 
    What is the role of the r-RNA in protein synthesis?
    • A. 

      It translates genetic code to a specific amino acid.

    • B. 

      It modifies mRNA molecules prior to protein synthesis.

    • C. 

      It provides a genetic map for the protein.

    • D. 

      It catalyzes the process.

  • 25. 
    Protein synthesis refers to the ......
    • A. 

      Process of formation of amino acids directly from a DNA template.

    • B. 

      Process of formation of mRNA from DNA template.

    • C. 

      Process of formation of amino acids from mRNA.

    • D. 

      Process of duplicating DNA required for protein synthesis.

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