Biology MDCAT MCQs
Cell biology, genetics & physiology MCQs
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Answer: DNA ligase seals the gaps between Okazaki fragments on the lagging strand during replication.
Answer: tRNA (transfer RNA) carries specific amino acids to the ribosome during translation.
Answer: Malaria is transmitted by female Anopheles mosquitoes carrying the Plasmodium parasite.
Answer: Translation occurs at ribosomes where mRNA is decoded to build a polypeptide chain.
Answer: Chloroplasts are called the kitchen of the cell because they synthesize food through photosynthesis.
Answer: Mesophyll cells contain chloroplasts and are the primary site of photosynthesis.
Answer: DNA (Deoxyribonucleic acid) is the molecule that carries genetic information in all living organisms.
Answer: The phosphorus cycle occurs mainly through rock, soil, and water without a significant atmospheric phase.
Answer: DNA replication produces an identical copy of DNA before cell division.
Answer: Asexual reproduction involves a single parent and produces clones without genetic variation.
Answer: The CFTR gene codes for a chloride channel protein; its mutation causes thick mucus buildup.
Answer: In roan cattle, both red and white hairs are expressed equally, showing co-dominance.
Answer: An ecosystem includes all living (biotic) and non-living (abiotic) components in an area.
Answer: B-lymphocytes differentiate into plasma cells that produce antibodies.
Answer: Gregor Mendel established the fundamental laws of inheritance through his work with pea plants.
Answer: A point mutation involves a change in a single nucleotide base pair in the DNA sequence.
Answer: Bacteria are living organisms and thus biotic components of an ecosystem.
Answer: Insulin is produced by the beta cells of the pancreas, not the liver.
Answer: Leucine is one of the nine essential amino acids that cannot be synthesized by the human body.
Answer: Solar energy is continuously replenished and classified as a renewable resource.