Biology - Biochemistry - MCQs
Learn about the chemical processes and substances that occur in living organisms.
Which of the following types of RNA is involved in carrying genetic information from the nucleus to the cytoplasm?
A. mRNA
B. tRNA
C. rRNA
D. snRNA
Answer: mRNA
What is the function of the lysosome in a cell?
A. Protein synthesis
B. Energy production
C. Digestion of waste materials
D. DNA replication
Answer: Digestion of waste materials
Which of the following organelles is responsible for protein synthesis?
A. Ribosome
B. Mitochondrion
C. Golgi apparatus
D. Lysosome
Answer: Ribosome
Which of the following molecules is involved in the synthesis of RNA from a DNA template?
A. RNA polymerase
B. DNA polymerase
C. Ribosome
D. tRNA
Answer: RNA polymerase
Which of the following molecules is a precursor for the synthesis of ATP?
A. Glucose
B. Amino acids
C. Fatty acids
D. Phosphate groups
Answer: Glucose
Which of the following is the main function of tRNA during protein synthesis?
A. It catalyzes protein formation
B. It transports amino acids to the ribosome
C. It synthesizes mRNA
D. It unwinds the DNA
Answer: It transports amino acids to the ribosome
Which of the following is NOT a part of the cell cycle?
A. M phase
B. G1 phase
C. G2 phase
D. Z phase
Answer: Z phase
What is the structure of a nucleotide?
A. Sugar, phosphate, and base
B. Amino acid, sugar, and phosphate
C. Fatty acid, glycerol, and phosphate
D. Protein, phosphate, and ribose
Answer: Sugar, phosphate, and base
What type of bond connects complementary bases in the two strands of DNA?
A. Covalent bond
B. Hydrogen bond
C. Ionic bond
D. Peptide bond
Answer: Hydrogen bond
What is the role of the enzyme DNA polymerase in DNA replication?
A. It unwinds the DNA
B. It synthesizes the new DNA strand
C. It removes RNA primers
D. It joins Okazaki fragments
Answer: It synthesizes the new DNA strand