Protein synthesis, the genetic code and gene mutations

Protein synthesis, the genetic code and gene mutations Quiz

Spec 1.4 · Edexcel A-Level Biology B: Quiz

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5 questions, one answer each

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  1. 1. Which base is found in RNA but not in DNA?

    • A. Thymine
    • B. Uracil
    • C. Guanine
    • D. Adenine

  2. 2. Which type of bond forms between the codon on mRNA and the anticodon on tRNA?

    • A. Peptide
    • B. Phosphodiester
    • C. Hydrogen
    • D. Disulfide

  3. 3. The anti-sense strand reads CAT. What is the mRNA codon?

    • A. GUA
    • B. GTA
    • C. CAU
    • D. UAC

  4. 4. Which mutation does NOT cause a frameshift?

    • A. Deletion of one base
    • B. Insertion of one base
    • C. Substitution of one base
    • D. Deletion of two bases

  5. 5. Why can a base substitution fail to change the amino acid sequence?

    • A. The code is non-overlapping
    • B. The code is degenerate
    • C. tRNA has no anticodon
    • D. mRNA has no codons

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