All Free Agriculture MCQs with Answers

• A. Transportation
• B. Fermentation
• C. Sterilization
• D. Ripening

Explanation: Fermentation is the anaerobic breakdown of organic substances when oxygen is absent, often producing alcohol or organic acids.

• A. Leucoplast
• B. Protoplast
• C. Chromoplast
• D. Chloroplast

Explanation: Chloroplasts contain chlorophyll and the enzymes of photosynthesis, with light reactions occurring in their thylakoid membranes and carbon…

• A. 25-35°C
• B. 18-24°C
• C. 20-25°C
• D. 10-20°C

Explanation: Warm-season crops grow best under relatively high temperatures, commonly about 25–35°C.

• A. 0°C
• B. -1°C
• C. 1°C
• D. 2°C

Explanation: Tender crops are injured by freezing conditions, so they generally cannot tolerate temperatures at or below 0°C.

• A. Absolute temperature
• B. Various temperature
• C. Cardinal temperature
• D. All the above

Explanation: The minimum, optimum and maximum temperatures for a crop are its cardinal temperatures.

• A. Heat of vaporization
• B. Heat energy
• C. Heat of fusion
• D. Mechanical heat

Explanation: Heat required to convert one kilogram of liquid into vapour at its boiling point is the latent heat of vaporization.

• A. 1
• B. 2
• C. 3
• D. 4

Explanation: In Pakistan, potato is commonly grown in three seasonal crops: autumn, spring and summer, with the summer crop mainly associated with…

• A. Senescence
• B. Partial Senescence
• C. Complete Senescence
• D. All the above

Explanation: Complete senescence occurs when the whole plant body dies while the seeds remain viable for continuation of the species.

• A. Fruit ripening
• B. Maturity
• C. Both a & b
• D. Senescence

Explanation: Senescence is the genetically regulated aging process in which plant tissues deteriorate and eventually die.

• A. Hypocotyle
• B. Micropyle
• C. Epictyl
• D. None of the above

Explanation: The hypocotyl is the embryonic stem region below the cotyledons and above the radicle.

• A. Glucopage
• B. Glycolysis
• C. Glycogen
• D. None of the above

Explanation: Glycolysis is the pathway that breaks glucose, or a compound entering through fructose metabolism, into pyruvic acid while releasing…

• A. Oxidation
• B. Transportation
• C. Respiration
• D. Both a & b

Explanation: Respiration is the controlled oxidation of organic compounds, releasing their stored energy for cellular activities.

• A. Photoperiodism
• B. Transpiration
• C. Photosynthesis
• D. Conversion

Explanation: Photosynthesis converts light energy into chemical energy stored mainly in glucose.

• A. Angiosperm
• B. Gymnosperm
• C. Dieetyledens
• D. Monocotyledons

Explanation: Angiosperms are flowering plants whose seeds are enclosed within fruits, and they include many major food, fiber and shelter-producing…

• A. Ecology
• B. Taxonomy
• C. Morphology
• D. Histology

Explanation: Taxonomy identifies, names and classifies plants into groups based on their characteristics.

• A. Heat action
• B. Molar heat
• C. Specified heat
• D. None of the above

Explanation: Specific heat is the heat required to raise the temperature of a unit mass of a substance by 1°C.

• A. Km
• B. Lumen
• C. Noticlemiles
• D. Lux

Explanation: Lux is the metric unit of illuminance, measuring the amount of light falling on a surface.

• A. Abscisic acid
• B. Auxins
• C. Gibberellins
• D. All the above

Explanation: Auxins are produced in actively growing regions such as terminal and lateral buds and help regulate growth and apical dominance.

• A. Long day plants
• B. Long night plants
• C. Day natural plants
• D. Long day and Long night plants

Explanation: Cucumber, kidney bean, pea and tomato are generally day-neutral plants, meaning flowering is not strongly controlled by day length.

• A. Senescence
• B. Both a & b
• C. Maturity
• D. Partial Senescence

Explanation: Senescence is the natural deterioration and death of plant organs. When it affects only certain aerial parts while the remainder of the…