MCQ Collection
MDCAT Biology MCQs
Practice MDCAT Biology questions with answers and explanations.
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Correct Answer: A. An alternative form of a gene
Explanation:
Alleles occupy the same locus on homologous chromosomes.
They may produce different trait variants.
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Correct Answer: B. A three-nucleotide sequence on mRNA specifying an amino acid or stop signal
Explanation:
The genetic code is read in triplets.
Each codon has a defined meaning.
Choose an option to check your answer.
Correct Answer: B. An alternative form of a gene
Explanation:
Alleles occupy the same locus on homologous chromosomes.
They may produce different trait variants.
Choose an option to check your answer.
Correct Answer: C. A three-nucleotide sequence on mRNA specifying an amino acid or stop signal
Explanation:
The genetic code is read in triplets.
Each codon has a defined meaning.
Choose an option to check your answer.
Correct Answer: C. An alternative form of a gene
Explanation:
Alleles occupy the same locus on homologous chromosomes.
They may produce different trait variants.
Choose an option to check your answer.
Correct Answer: D. A three-nucleotide sequence on mRNA specifying an amino acid or stop signal
Explanation:
The genetic code is read in triplets.
Each codon has a defined meaning.
Choose an option to check your answer.
Correct Answer: D. The genetic makeup for one or more traits
Explanation:
Genotype refers to allele combinations.
Phenotype results from genotype and environment.
Choose an option to check your answer.
Correct Answer: A. A three-nucleotide sequence on tRNA complementary to an mRNA codon
Explanation:
The anticodon pairs with the codon during translation.
This ensures delivery of the correct amino acid.
Choose an option to check your answer.
Correct Answer: A. The genetic makeup for one or more traits
Explanation:
Genotype refers to allele combinations.
Phenotype results from genotype and environment.
Choose an option to check your answer.
Correct Answer: B. A three-nucleotide sequence on tRNA complementary to an mRNA codon
Explanation:
The anticodon pairs with the codon during translation.
This ensures delivery of the correct amino acid.
Choose an option to check your answer.
Correct Answer: B. The genetic makeup for one or more traits
Explanation:
Genotype refers to allele combinations.
Phenotype results from genotype and environment.
Choose an option to check your answer.
Correct Answer: C. A three-nucleotide sequence on tRNA complementary to an mRNA codon
Explanation:
The anticodon pairs with the codon during translation.
This ensures delivery of the correct amino acid.
