Botany Examination Questions and
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
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1. The branch of biology that studies plants is called:
A. Zoology
B. Ecology
C. Botany
D. Microbiology
Correct Answer: C. Botany
Rationale: Botany is the scientific study of plants, including their structure,
function, evolution, and classification.
2. The basic structural and functional unit of a plant is the:
A. Tissue
B. Organ
C. Cell
D. Organ system
Correct Answer: C. Cell
Rationale: Cells are the smallest units capable of carrying out life processes.
3. The plant cell wall is primarily composed of:
A. Chitin
B. Glycogen
,C. Cellulose
D. Peptidoglycan
Correct Answer: C. Cellulose
Rationale: Cellulose provides strength and support to plant cell walls.
4. The organelle responsible for photosynthesis is the:
A. Mitochondrion
B. Nucleus
C. Ribosome
D. Chloroplast
Correct Answer: D. Chloroplast
Rationale: Chloroplasts contain chlorophyll and are the sites of photosynthesis.
5. Chlorophyll primarily functions to:
A. Store starch
B. Transport water
C. Absorb light energy
D. Produce proteins
Correct Answer: C. Absorb light energy
Rationale: Chlorophyll captures light energy needed for photosynthesis.
6. The primary pigment involved in photosynthesis is:
A. Carotene
B. Xanthophyll
C. Anthocyanin
D. Chlorophyll a
Correct Answer: D. Chlorophyll a
,Rationale: Chlorophyll a is the main photosynthetic pigment responsible for
capturing light energy.
7. The process by which plants make glucose using light energy is:
A. Respiration
B. Transpiration
C. Fermentation
D. Photosynthesis
Correct Answer: D. Photosynthesis
Rationale: Photosynthesis converts carbon dioxide and water into glucose using
light energy.
8. The gas absorbed by plants during photosynthesis is:
A. Oxygen
B. Nitrogen
C. Hydrogen
D. Carbon dioxide
Correct Answer: D. Carbon dioxide
Rationale: Plants use carbon dioxide as a carbon source to produce
carbohydrates.
9. The gas released during photosynthesis is:
A. Carbon dioxide
B. Nitrogen
C. Oxygen
D. Methane
Correct Answer: C. Oxygen
, Rationale: Oxygen is released as a byproduct of water splitting during
photosynthesis.
10. The main function of plant roots is to:
A. Produce flowers
B. Perform reproduction
C. Absorb water and minerals
D. Absorb sunlight
Correct Answer: C. Absorb water and minerals
Rationale: Roots anchor plants and absorb essential water and nutrients from soil.
11. Root hairs increase the ability of roots to:
A. Produce seeds
B. Absorb water and minerals
C. Perform photosynthesis
D. Transport sugars
Correct Answer: B. Absorb water and minerals
Rationale: Root hairs increase surface area for absorption.
12. The tissue responsible for transporting water in plants is:
A. Phloem
B. Epidermis
C. Cortex
D. Xylem
Correct Answer: D. Xylem
Rationale: Xylem transports water and dissolved minerals from roots to other
plant parts.
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
Download Pdf
1. The branch of biology that studies plants is called:
A. Zoology
B. Ecology
C. Botany
D. Microbiology
Correct Answer: C. Botany
Rationale: Botany is the scientific study of plants, including their structure,
function, evolution, and classification.
2. The basic structural and functional unit of a plant is the:
A. Tissue
B. Organ
C. Cell
D. Organ system
Correct Answer: C. Cell
Rationale: Cells are the smallest units capable of carrying out life processes.
3. The plant cell wall is primarily composed of:
A. Chitin
B. Glycogen
,C. Cellulose
D. Peptidoglycan
Correct Answer: C. Cellulose
Rationale: Cellulose provides strength and support to plant cell walls.
4. The organelle responsible for photosynthesis is the:
A. Mitochondrion
B. Nucleus
C. Ribosome
D. Chloroplast
Correct Answer: D. Chloroplast
Rationale: Chloroplasts contain chlorophyll and are the sites of photosynthesis.
5. Chlorophyll primarily functions to:
A. Store starch
B. Transport water
C. Absorb light energy
D. Produce proteins
Correct Answer: C. Absorb light energy
Rationale: Chlorophyll captures light energy needed for photosynthesis.
6. The primary pigment involved in photosynthesis is:
A. Carotene
B. Xanthophyll
C. Anthocyanin
D. Chlorophyll a
Correct Answer: D. Chlorophyll a
,Rationale: Chlorophyll a is the main photosynthetic pigment responsible for
capturing light energy.
7. The process by which plants make glucose using light energy is:
A. Respiration
B. Transpiration
C. Fermentation
D. Photosynthesis
Correct Answer: D. Photosynthesis
Rationale: Photosynthesis converts carbon dioxide and water into glucose using
light energy.
8. The gas absorbed by plants during photosynthesis is:
A. Oxygen
B. Nitrogen
C. Hydrogen
D. Carbon dioxide
Correct Answer: D. Carbon dioxide
Rationale: Plants use carbon dioxide as a carbon source to produce
carbohydrates.
9. The gas released during photosynthesis is:
A. Carbon dioxide
B. Nitrogen
C. Oxygen
D. Methane
Correct Answer: C. Oxygen
, Rationale: Oxygen is released as a byproduct of water splitting during
photosynthesis.
10. The main function of plant roots is to:
A. Produce flowers
B. Perform reproduction
C. Absorb water and minerals
D. Absorb sunlight
Correct Answer: C. Absorb water and minerals
Rationale: Roots anchor plants and absorb essential water and nutrients from soil.
11. Root hairs increase the ability of roots to:
A. Produce seeds
B. Absorb water and minerals
C. Perform photosynthesis
D. Transport sugars
Correct Answer: B. Absorb water and minerals
Rationale: Root hairs increase surface area for absorption.
12. The tissue responsible for transporting water in plants is:
A. Phloem
B. Epidermis
C. Cortex
D. Xylem
Correct Answer: D. Xylem
Rationale: Xylem transports water and dissolved minerals from roots to other
plant parts.
