All Free Agriculture MCQs with Answers

• A. Colorimeter
• B. Paramagnetic analyzer
• C. Hygrometer
• D. none of the above

Explanation: A hygrometer measures atmospheric humidity, either directly or through changes in a sensing material.

• A. More
• B. Too muchAccess Government Careers
• C. No
• D. Less

Explanation: High humidity reduces the vapour-pressure gradient between the leaf and surrounding air, so the driving force for water loss falls and…

• A. ATP
• B. UTP
• C. CTP
• D. KTP

Explanation: Photophosphorylation is the light-driven formation of ATP from ADP and inorganic phosphate in chloroplasts.

• A. Glycogen
• B. Starch
• C. Sucrose
• D. None of the above

Explanation: Plants commonly convert surplus glucose into starch, an osmotically safer storage carbohydrate that can later be broken down for energy.

• A. Polysaccharide
• B. Monosaccharide
• C. Disaccharide
• D. Trisaccharide

Explanation: Raffinose is a trisaccharide made of galactose, glucose and fructose. It belongs to the raffinose family of oligosaccharides rather than…

• A. Inner membrane of mitochondria
• B. Cytoplasm
• C. matrix of mitochondria
• D. Chloroplast

Explanation: In aerobic respiration, the electron transport chain is embedded in the inner mitochondrial membrane, where electrons pass through…

• A. Ribosome's
• B. Mitochondria
• C. Lysosomes
• D. Plastids

Explanation: Mitochondria contain the respiratory enzymes and electron-transport machinery used to release energy through cellular respiration.

• A. Glycogen
• B. Cellulose
• C. Strach
• D. Fat

Explanation: Plants commonly store excess photosynthetic food as starch, an insoluble polysaccharide that can later be converted back into sugars.

• A. Nitrogen
• B. Potassium
• C. Phosphorus
• D. Zinc

Explanation: Nitrogen promotes leaf formation, chlorophyll production, and vigorous vegetative growth, giving plants a characteristic green colour.

• A. Iron
• B. Phosphorus
• C. Potassium
• D. Nitrogen

Explanation: Phosphorus deficiency commonly causes anthocyanin accumulation, giving older leaves a reddish-purple or purplish appearance.

• A. Siliviculture
• B. Sericulture
• C. Regeneration
• D. Nursery

Explanation: Regeneration is the establishment of a new crop or stand, either naturally from existing seed and growth or artificially through human…

• A. Sericulture
• B. Agro forestry
• C. range forestry
• D. Forestry

Explanation: Forestry is the science and practice of establishing, managing, and raising trees and forest resources.

• A. Long day plants
• B. Short day plants
• C. Photoperiod
• D. Phototropism

Explanation: Long-day plants begin flowering when day length exceeds a critical duration, or when the uninterrupted night becomes sufficiently short.

• A. Fates
• B. Starch
• C. Cellulose
• D. Protein

Explanation: Cotton fibre is a long, greatly elongated plant cell whose wall is composed mainly of cellulose.

• A. None of the above
• B. Phagocytosis
• C. Imbibitions
• D. Pinoeytosis

Explanation: Pinocytosis is the uptake of liquid or dissolved substances by forming tiny vesicles from the cell membrane, so it is often called cell…

• A. Albinism
• B. Acrodsome
• C. Agoun
• D. None of the above

Explanation: Albinism in plants refers to the absence or severe deficiency of chlorophyll, producing pale or white tissues.

• A. All the above
• B. Castor
• C. Colocasia
• D. Maize

Explanation: Maize, castor and Colocasia bear separate male and female flowers on the same plant, which makes each species monoecious.

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

Explanation: Chlorosis is the loss or reduction of green chlorophyll colour, causing leaves to appear pale yellow.

• A. Hydrogen
• B. Carbon dioxide
• C. Nitrogen
• D. Oxygen

Explanation: During daylight, photosynthesis generally exceeds respiration in green plants, giving a net release of oxygen.

• A. 800-1200 Kg
• B. 1200 Kg
• C. 500 Kg
• D. 5000 Kg

Explanation: Potato seed tuber requirements commonly range from about 800 to 1,200 kg per hectare, depending on tuber size and planting distance.