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9 Cards in this Set
- Front
- Back
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Why is there a need to produce Okazaki fragments on the lagging strand, but not on the leading strand of DNA? Select one:
a)It is substantially more efficient to make several shorter strands rather than one longer strand of DNA. b) There isn't enough cellular DNA ligase for bonding Okazaki fragments together if they were produced from both parental strands. c) The two parental strands of DNA are antiparallel and DNA polymerase makes DNA in the 5' to 3' direction only. |
c |
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Which one of the following statements about mutations is incorrect?Select one:
a)All of the other 4 statements about mutations are correct. b) Cancer can arise from uncorrected mutational events c) All species have multiple systems in place to correct mutations that occur. d) All mutations have negative consequences for the cells that acquire them. |
d |
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Which of the following scientists was responsible for elucidating the structure of DNA using X-ray crystallography?Select one:
a)Bolonas-Garcia b)Watson and Crick c) Chargaff d) Franklin |
d |
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Arrange the following structures in size from smallest to largest. 1 chromosome, 2 genome, 3 nucleosome, 4 nucleotide.Select one:
a)3, 2, 4, 1 b) 4, 3, 1, 2 c) 1, 4, 3, 2 d) 3, 1, 4, 2 |
b |
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Reverse transcriptase is an enzyme that can synthesise DNA from an RNA template. What DNA sequence is produced from an RNA molecule with the sequence 5'-AUUGACGGU-3'? Select one:
a)5'-ATTGACGGT-3' b)5'-TAACTGCCA-3' c) 5'-TUUCTGCCU-3' d)5'-UAACUGCCA-3' |
b |
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If a DNA template strand (not the coding strand) has a sequence of 3'- TACAATGTAGCC-5', then the RNA produced from it will be which sequence? Select one:
a) 3'-TACAATGTAGCC-5 b)'5'-AUGUUACAUCGG-3' c) 5'-ATGTTACATCGG-3' d)3'-AUGUUACAUCGG-5' |
b |
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Which one of the following is not an example of a point mutation?Select one:
a) An insertion of a single extra base during DNA replication b)An insertion of a transposon into the coding region of a structural gene c) A change in a methionine codon to a codon specifying isoleucine |
b |
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The process of tRNA "charging" does NOT involve __________.Choose the one answer that best fills the blank.
Select one: a)tRNA b)rRNA c) an amino acid d)ATP |
b |
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The term 'N-terminus' refers to the presence of a(n) ________ at the 5' end of a polypeptide. Choose the answer that best fills the blank.Select one:
a)carboxyl group b)net positive charge c)hydroxyl group d)amino group |
d |
