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8.1 The genetic code

Quiz by Mr R Horn

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14 questions
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  • Q1

    Each base in a sequence is only read once. What is the key-term for this feature?

    Non-overlapping 

    Universal

    Degenerate 

    Splicing

    30s
  • Q2

    If a sequence read ‘ATGCGTTAA’, it would be read ATG, CGT, TAA (not: ATG, GCG, CGT, TTA). 

    What term is used to describe this characteristic of the genetic code?

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    30s
  • Q3

    Most amino acids are coded for by more than one triplet. What is the key-term for this feature?

    Degenerate 

    Non-overlapping 

    Splicing

    Universal

    30s
  • Q4

    The amino acid, Valine (Val), may be coded for by the DNA triplets: CAA, CAG, CAT, CAC.  Which key-term is used to describe this feature of DNA (with each amino  acids being coded for by more than one triplet.

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    30s
  • Q5

    Every living organism that has been studied uses the same code (eg CAG codes for Valine). Which key-term is used to describe this feature of DNA?

    Degenerate 

    Splicing 

    Universal 

    Non-overlapping 

    30s
  • Q6

    In both the fruit fly, Drosophila melanogaster, and in the nematode worm, Caenorhabditis elegans, the DNA triplet CAG codes for the amino acid Valine.

    What key term is used for this feature of DNA?

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    30s
  • Q7

    The non-coding sequences within a gene are referred to as …

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    30s
  • Q8

    The coding sequences within a gene are referred to as …

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    30s
  • Q9

    Which keyword means ‘the exact position of a gene on a chromosome (DNA molecule)’.

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    30s
  • Q10

    Which is the best definition of ‘a gene’?

    A section of DNA, with a specific sequence of bases, which codes for a polypeptide

    The part of a chromosome which is exressed in the phenotype

    A sequence of bases in a section of DNA, which codes for a protein

    A length of DNA, which codes for a characteristic

    30s
  • Q11

    How many different amino acids could, in theory, be produced if two bases coded for each amino acid? 

    16

    64

    256

    20

    30s
  • Q12

    How many different amino acids could, in theory, be produced with three bases coded for each amino acid? 

    16

    64

    20

    256

    30s
  • Q13

    What is the term for the full range of proteins that a cell/organism can produce?

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    30s
  • Q14

    What is the term for the full range of genes in a cell/organism?

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    30s

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