Agricultural Biology Examination
Questions and Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. Agricultural biology primarily studies:
A. Human anatomy only
B. Weather patterns only
C. Geological processes
D. Biological principles applied to agriculture
Correct Answer: D. Biological principles applied to agriculture
Rationale: Agricultural biology applies biological concepts to crop production,
livestock, and agricultural systems.
2. The basic unit of life is the:
A. Tissue
B. Organ
C. Organ system
D. Cell
Correct Answer: D. Cell
Rationale: All living organisms are composed of cells, which are the fundamental
units of life.
3. Plants are classified as:
,A. Heterotrophs
B. Consumers
C. Decomposers
D. Autotrophs
Correct Answer: D. Autotrophs
Rationale: Plants produce their own food through photosynthesis.
4. Photosynthesis occurs mainly in the:
A. Nucleus
B. Mitochondria
C. Ribosome
D. Chloroplast
Correct Answer: D. Chloroplast
Rationale: Chloroplasts contain chlorophyll and are the site of photosynthesis.
5. The pigment responsible for capturing light energy in plants is:
A. Hemoglobin
B. Melanin
C. Keratin
D. Chlorophyll
Correct Answer: D. Chlorophyll
Rationale: Chlorophyll absorbs light energy needed for photosynthesis.
6. Plants produce glucose during:
A. Respiration
B. Transpiration
C. Germination
D. Photosynthesis
,Correct Answer: D. Photosynthesis
Rationale: Photosynthesis converts carbon dioxide and water into glucose using
light energy.
7. 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 for glucose production.
8. The gas released during photosynthesis is:
A. Carbon dioxide
B. Nitrogen
C. Methane
D. Oxygen
Correct Answer: D. Oxygen
Rationale: Oxygen is released as a by-product of photosynthesis.
9. Plant respiration occurs primarily in the:
A. Chloroplast
B. Cell wall
C. Vacuole
D. Mitochondria
Correct Answer: D. Mitochondria
Rationale: Mitochondria produce ATP through cellular respiration.
, 10. The main energy molecule in cells is:
A. DNA
B. Glucose
C. RNA
D. ATP
Correct Answer: D. ATP
Rationale: ATP stores and transfers energy for cellular activities.
11. The plant tissue responsible for water transport is:
A. Phloem
B. Epidermis
C. Cortex
D. Xylem
Correct Answer: D. Xylem
Rationale: Xylem transports water and minerals from roots to other plant parts.
12. The plant tissue responsible for sugar transport is:
A. Xylem
B. Cambium
C. Root hair
D. Phloem
Correct Answer: D. Phloem
Rationale: Phloem transports sugars produced during photosynthesis.
13. Root hairs increase plant ability to absorb:
Questions and Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. Agricultural biology primarily studies:
A. Human anatomy only
B. Weather patterns only
C. Geological processes
D. Biological principles applied to agriculture
Correct Answer: D. Biological principles applied to agriculture
Rationale: Agricultural biology applies biological concepts to crop production,
livestock, and agricultural systems.
2. The basic unit of life is the:
A. Tissue
B. Organ
C. Organ system
D. Cell
Correct Answer: D. Cell
Rationale: All living organisms are composed of cells, which are the fundamental
units of life.
3. Plants are classified as:
,A. Heterotrophs
B. Consumers
C. Decomposers
D. Autotrophs
Correct Answer: D. Autotrophs
Rationale: Plants produce their own food through photosynthesis.
4. Photosynthesis occurs mainly in the:
A. Nucleus
B. Mitochondria
C. Ribosome
D. Chloroplast
Correct Answer: D. Chloroplast
Rationale: Chloroplasts contain chlorophyll and are the site of photosynthesis.
5. The pigment responsible for capturing light energy in plants is:
A. Hemoglobin
B. Melanin
C. Keratin
D. Chlorophyll
Correct Answer: D. Chlorophyll
Rationale: Chlorophyll absorbs light energy needed for photosynthesis.
6. Plants produce glucose during:
A. Respiration
B. Transpiration
C. Germination
D. Photosynthesis
,Correct Answer: D. Photosynthesis
Rationale: Photosynthesis converts carbon dioxide and water into glucose using
light energy.
7. 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 for glucose production.
8. The gas released during photosynthesis is:
A. Carbon dioxide
B. Nitrogen
C. Methane
D. Oxygen
Correct Answer: D. Oxygen
Rationale: Oxygen is released as a by-product of photosynthesis.
9. Plant respiration occurs primarily in the:
A. Chloroplast
B. Cell wall
C. Vacuole
D. Mitochondria
Correct Answer: D. Mitochondria
Rationale: Mitochondria produce ATP through cellular respiration.
, 10. The main energy molecule in cells is:
A. DNA
B. Glucose
C. RNA
D. ATP
Correct Answer: D. ATP
Rationale: ATP stores and transfers energy for cellular activities.
11. The plant tissue responsible for water transport is:
A. Phloem
B. Epidermis
C. Cortex
D. Xylem
Correct Answer: D. Xylem
Rationale: Xylem transports water and minerals from roots to other plant parts.
12. The plant tissue responsible for sugar transport is:
A. Xylem
B. Cambium
C. Root hair
D. Phloem
Correct Answer: D. Phloem
Rationale: Phloem transports sugars produced during photosynthesis.
13. Root hairs increase plant ability to absorb:
