MDCAT Pakistan · Biology
Genetics and Molecular Biology
16 practice questions, each with the answer and an explanation.
Practise Genetics and Molecular Biology now
Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.
All 16 questions
- Which bases pair together in DNA?
- Which base replaces thymine in RNA?
- What is a codon?
- Which enzyme joins Okazaki fragments on the lagging strand?
- Which enzyme unwinds the DNA double helix at the replication fork?
- What type of mutation is sickle-cell anaemia?
- A man with blood group A and a woman with blood group B have a child with blood group O. What are the parents' genotypes?
- What is the phenotypic ratio of a monohybrid cross between two heterozygous parents with complete dominance?
- What is the phenotypic ratio of a dihybrid cross between two double heterozygotes (independent assortment)?
- What does a test cross involve?
- Which disease is X-linked recessive?
- A colour-blind man marries a woman who is not a carrier. What fraction of their sons will be colour-blind?
- Which enzyme cuts DNA at specific sequences in genetic engineering?
- Which technique amplifies a specific DNA sequence?
- Which enzyme makes DNA from an RNA template?
- In a population in Hardy–Weinberg equilibrium, the frequency of a recessive allele is 0.3. What proportion of the population are heterozygous carriers?
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