Prepare for MDCAT 2026 with this Chromosomes and DNA Quiz featuring 20 important Biology MCQs on DNA structure, RNA, genetic code, DNA replication, transcription, translation, nucleotide bonding, hydrogen bonding, DNA ligase, DNA polymerase, codons, tRNA, and protein synthesis. Test your conceptual understanding of molecular biology and identify areas that need further revision.
This MDCAT Biology quiz includes questions covering important concepts such as DNA and RNA bases, complementary base pairing, termination codons, genetic code, amino acids, mRNA processing, tRNA, DNA replication enzymes, nucleotide addition, DNA ligase, and hydrogen bonds between nitrogenous bases. It is suitable for students preparing for MDCAT 2026, medical college entrance tests, and Biology examinations.
Results
#1. What is the effect of the enzyme DNA ligase
#2. When two nucleotides join each other, what type of bond is formed
#3. The base sequence ATTG on DNA specifies the sequence for RNA
#4. The process of nucleotide addition is only done by
#5. Which of the following is not a stop codon?
#6. Polymerase only adds nucleotides on 3 direction when —————— is attached to the parent strand
#7. The cap and tail save the mRNA from a variety of
#8. The enzyme controls the unwinding of the double helix
#9. Which of the following bonds exists between the bases in the DNA helix
#10. Biochemical analysis of DNA shows that cytosine forms 40% of nitrogenous bases; what will be the percentage of adenine
#11. Adenine forms how many hydrogen bonds with theymine
#12. In centrifugation, the gel is used
#13. Which of the following bases is never found in RNA
#14. Which of the following is present in both DNA and RNA
#15. Which of the following is a termination codon
#16. Genetic code is
#17. In bacteria, newly synthesized mRNA is released in
#18. The number of amino acids commonly used to synthesize proteins in living things?
#19. Which of the following factors is responsible for joining the small subunit to mRNA
#20. Human cells contain about ————— kinds of tRNA
Chromosomes and DNA Quiz for MDCAT with Answers
- Which of the following factors is responsible for joining the small subunit to mRNA
- Which of the following is a termination codon
- In bacteria, newly synthesized mRNA is released in
- The base sequence ATTG on DNA specifies the sequence for RNA
- The number of amino acids commonly used to synthesize proteins in living things?
- What is the effect of the enzyme DNA ligase?
- Biochemical analysis of DNA shows that cytosine forms 40% of nitrogenous bases; what will be the percentage of adenine
- Which of the following is present in both DNA and RNA
- Which of the following bases is never found in RNA
- The process of nucleotide addition is only done by
- In centrifugation, the gel is used
- Adenine forms how many hydrogen bonds with thymine
- When two nucleotides join each other, what type of bond is formed
- Which of the following bonds exists between the bases in the DNA helix
- The enzyme controls the unwinding of the double helix
- Human cells contain about ————— kinds of tRNA
- Polymerase only adds nucleotides on 3 direction when —————— is attached to the parent strand
- Which of the following is not a stop codon?
- The cap and tail save the mRNA from a variety of
- Genetic code is
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