Exam question with correct answers (100%
verified answers) plus rationales Q &A
2026 INSTANT DOWNLOAD PDF
1. What is biotechnology?
A. Study of rocks
B. Use of living organisms to create useful products
C. Study of weather
D. Production of metals
Answer: B
Rationale: Biotechnology applies biological systems, organisms, or their
components to develop products and technologies useful to humans.
2. Which molecule carries genetic information in most organisms?
A. RNA
B. Protein
C. DNA
D. Lipid
Answer: C
Rationale: DNA contains the hereditary instructions that determine traits and
cellular functions.
3. What does DNA stand for?
A. Dynamic Nucleic Acid
,B. Deoxyribonucleic Acid
C. Dioxyribonucleic Acid
D. Double Nucleotide Acid
Answer: B
Rationale: DNA stands for Deoxyribonucleic Acid, the primary genetic material in
cells.
4. Which base pairs with adenine in DNA?
A. Cytosine
B. Guanine
C. Thymine
D. Uracil
Answer: C
Rationale: Adenine (A) pairs specifically with Thymine (T) in DNA.
5. Which base pairs with guanine?
A. Adenine
B. Thymine
C. Uracil
D. Cytosine
Answer: D
Rationale: Guanine forms complementary base pairs with Cytosine.
6. Which organelle contains most of the cell's DNA?
A. Ribosome
B. Nucleus
C. Golgi apparatus
D. Lysosome
, Answer: B
Rationale: The nucleus stores and protects the majority of genetic material in
eukaryotic cells.
7. What is a gene?
A. A protein
B. A chromosome
C. A DNA segment coding for a trait or function
D. A lipid molecule
Answer: C
Rationale: Genes are specific DNA sequences that contain instructions for
producing proteins or functional RNA.
8. Which process converts DNA into RNA?
A. Translation
B. Replication
C. Transcription
D. Mutation
Answer: C
Rationale: Transcription synthesizes RNA using DNA as a template.
9. Which process converts mRNA into protein?
A. Replication
B. Translation
C. Mutation
D. Sequencing
Answer: B
Rationale: Translation occurs at ribosomes where proteins are synthesized from
mRNA instructions.