Free Horticulture MCQs with Answers
286 Horticulture MCQs from Agriculture, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
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286 questions · page 5 of 15
- A. Taste
- B. Aroma
- C. All the above
- D. Flavor
Explanation: Flavor is the overall perception produced by taste, aroma and related mouth sensations, and the term is also used for the substances…
Correct answer: Flavor- A. Sodium propionate
- B. Benzoate
- C. Sorbic acid
- D. Nitrates
Explanation: Benzoate, usually added as sodium benzoate, inhibits yeasts and moulds in acidic carbonated drinks.
Correct answer: Benzoate- A. Anti sprouting
- B. Anti ripening agent
- C. Antioxidants
- D. Antimicrobial agents
Explanation: BHA and BHT are synthetic antioxidants that slow oxidation, especially the rancidity of fats and oils.
Correct answer: Antioxidants- A. All the aboveFood
- B. Food adulterants
- C. Food additives
- D. Food contaminations
Explanation: Unintended entry of foreign or harmful substances during production, processing, storage or handling is food contamination.
Correct answer: Food contaminations- A. Pasteurization
- B. Blanching
- C. Sterilization
Explanation: Blanching briefly heats plant material to inactivate enzymes before freezing, dehydration or canning.
Correct answer: Blanching- A. 0.99
- B. 1.0
- C. 1.6
Explanation: Most fresh foods have very high water activity, commonly around 0.95 to 0.99, so 0.99 is the best listed value.
Correct answer: 0.99- A. Thermophilic
- B. All the above
- C. Mesophilic
- D. Psychrophilic
Explanation: Psychrophilic bacteria are adapted to low temperatures and can grow near refrigeration conditions, unlike mesophiles, which prefer…
Correct answer: Psychrophilic- A. Thermophilic
- B. Mesophilic
- C. Psychrophilic
- D. All the above
Explanation: Thermophilic bacteria prefer elevated temperatures, commonly about 45 to thermophilic 70°C, with many growing well near 55°C.
Correct answer: Thermophilic- A. Ligases enzyme
- B. Isomerase enzyme
- C. Lysos enzyme
- D. Hydrolases enzyme
Explanation: Pyruvate carboxylase joins carbon dioxide to pyruvate using ATP, forming oxaloacetate; this bond-forming reaction places it among ligases.
Correct answer: Ligases enzyme- A. Ligase enzyme
- B. Lysose enzyme
- C. Isomerases enzyme
- D. Hydrolase enzyme
Explanation: Fumarase catalyses the reversible addition or removal of water in the conversion of fumarate and malate, so it belongs to the lyase class.
Correct answer: Lysose enzyme- A. Chemist
- B. Nutritionist
- C. All the above
- D. Food processor
Explanation: Food processors classify foods by their keeping quality as stable, semi-perishable, or perishable, which guides packaging, storage, and…
Correct answer: Food processor- A. Scurvy
- B. Night blindness
- C. Rickets
- D. Beriberi
Explanation: Ascorbic acid is vitamin C, and its deficiency causes scurvy, marked by bleeding gums and poor wound healing.
Correct answer: Scurvy- A. Vitamin C
- B. Vitamin H
- C. Vitamin D
- D. Vitamin E
Explanation: Biotin is also called vitamin H, or vitamin B7, and is involved in carbohydrate, fat, and protein metabolism.
Correct answer: Vitamin H- A. Cholecaliferol
- B. Niacin
- C. Riboflavin
- D. Folic acidVitamins & Supplements
Explanation: Riboflavin, or vitamin B2, is a yellow crystalline, water-soluble vitamin, which is why it can impart a yellow colour to foods and body…
Correct answer: Riboflavin- A. Vitamin K
- B. Vitamin D
- C. Vitamin C
- D. Tocopherol
Explanation: Vitamin K is required for the formation of several blood-clotting factors in the liver, so its deficiency can cause abnormal bleeding.
Correct answer: Vitamin K- A. Vitamin B
- B. Vitamin D
- C. Vitamin E
- D. Vitamin A
Explanation: Ultraviolet B rays convert a cholesterol precursor in the skin into vitamin D3, which is then activated by the liver and kidneys.
Correct answer: Vitamin D- A. Vitamin C
- B. Vitamin B
- C. Vitamin A
- D. Vitamin E
Explanation: Vitamin A deficiency causes night blindness and keratinization or xerosis of epithelial tissues, including the cornea.
Correct answer: Vitamin A- A. Accumulation of ethanol
- B. Accumulation of acetaldehyde
- C. Accumulation of toxic compounds
- D. All the above
Explanation: Chilling injury disrupts normal fruit metabolism, causing ethanol and acetaldehyde accumulation along with other toxic metabolites.
Correct answer: All the above- A. 70%
- B. 80%
- C. 85%
- D. 90%
Explanation: A relative humidity of about 90% or higher reduces water loss and shrivelling while fruits ripen.
Correct answer: 90%- A. Cold air cooling
- B. Vacuum cooling
- C. Hydro cooling
- D. None of the above
Explanation: Mangoes can be cooled efficiently by hydrocooling because water transfers heat faster than air.
Correct answer: Hydro cooling