QCEVault

Genetics and heredity — Question 12

QCAA 2020, Paper 1 · 1 mark

Q12 · 2020 · Paper 1Unclassified1 mark

QUESTION 12

In the structure of DNA, adenine pairs with which other base?

(A) uracil

(B) guanine

(C) cytosine

(D) thymine

Question linkQCAA assessment resources

Related questions

  1. Q1 · 2025 QCAA · Paper 1 · 1 mark
    QUESTION 1 Which base pairs with adenine during DNA replication? (A) uracil (B) guanine (C) thymine (D) cytosine
    Genetics and heredity
  2. Q4 · 2025 QCAA · Paper 1 · 1 mark
    QUESTION 4 What is the role of tRNA in protein synthesis? (A) acting as a template strand for mRNA (B) matching amino acids to mRNA codons (C) transporting mRNA from the nucleus to the ribosome (D) providing a copy of genetic instructions for the ribosome
    Genetics and heredity
  3. Q5 · 2025 QCAA · Paper 1 · 1 mark
    QUESTION 5 Which option describes the contents of a human cell at metaphase I of meiosis? Number of chromosomes Number of copies of each gene (A) 23 1 (B) 23 2 (C) 46 2 (D) 46 4
    Genetics and heredity
  4. Q10 · 2025 QCAA · Paper 1 · 1 mark
    QUESTION 10 In humans, sex-linked recessive traits are more common in (A) males, because they have a Y chromosome. (B) females, because they have two X chromosomes. (C) males, because they have only one X chromosome. (D) females, because they do not have a Y chromosome.
    Genetics and heredity