AND CORRECT ANSWERS (VERIFIED ANSWERS) PLUS
RATIONALES -2026 |NSTANT DOWNLOAD PDF
1. Which organelle is responsible for ATP production?
A. Ribosome
B. Lysosome
C. Mitochondrion
D. Golgi apparatus
*Correct answer: C – Mitochondria generate ATP via oxidative
phosphorylation.
2. DNA replication occurs during which phase of the cell cycle?
A. G1
B. S
C. G2
D. M
*Correct answer: B – The S phase is dedicated to DNA synthesis.
3. Which molecule carries genetic information from nucleus to
ribosome?
A. tRNA
B. rRNA
C. mRNA
D. DNA
*Correct answer: C – mRNA transports genetic code for protein
synthesis.
,4. What type of bond holds amino acids together in proteins?
A. Hydrogen bond
B. Ionic bond
C. Peptide bond
D. Disulfide bond
*Correct answer: C – Peptide bonds link amino acids.
5. Which blood cells are responsible for immunity?
A. Erythrocytes
B. Platelets
C. Leukocytes
D. Plasma cells
*Correct answer: C – Leukocytes defend against pathogens.
6. Photosynthesis primarily occurs in which structure?
A. Mitochondria
B. Chloroplast
C. Nucleus
D. Vacuole
*Correct answer: B – Chloroplasts contain chlorophyll.
7. Which macromolecule stores genetic information?
A. Protein
B. Lipid
C. Carbohydrate
D. Nucleic acid
*Correct answer: D – DNA and RNA are nucleic acids.
8. Which enzyme breaks down starch into maltose?
A. Pepsin
, B. Lipase
C. Amylase
D. Trypsin
*Correct answer: C – Amylase digests starch.
9. What is the function of the ribosome?
A. Lipid synthesis
B. Protein synthesis
C. DNA replication
D. Energy storage
*Correct answer: B – Ribosomes assemble proteins.
10. Which vitamin is essential for blood clotting?
A. Vitamin A
B. Vitamin C
C. Vitamin D
D. Vitamin K
*Correct answer: D – Vitamin K activates clotting factors.
GENERAL CHEMISTRY
11. What is the pH of a neutral solution at 25°C?
A. 5
B. 6
C. 7
D. 8
*Correct answer: C – Pure water has a pH of 7.