MCAER PG CET 2026: Horticulture

Time Remaining: 100s

1. Which of the following is the primary cause of 'Spongy Tissue' in Alphonso mango, a physiological disorder linked to convective heat?

• A. Calcium deficiency
• B. High soil temperature and post-harvest heat
• C. Boron toxicity
• D. Ethylene over-production

Correct Answer: B. It is a non-pathological disorder where the pulp remains unripe and acidic due to convective heat from the soil.

2. [PYQ 2021] The phenomenon of 'Metaxenia' in Date Palm refers to:

• A. Effect of pollen on maternal tissues
• B. Effect of pollen on the endosperm
• C. Development of fruit without fertilization
• D. Self-incompatibility in flowers

Correct Answer: A. Metaxenia is the direct influence of pollen on the characteristics of the fruit (maternal tissue) outside the embryo.

3. In Rose, the 'Pulsing' treatment is used to increase vase life. Which chemical is most commonly used?

• A. Silver Thiosulphate (STS) + Sucrose
• B. Potassium Permanganate
• C. Gibberellic Acid
• D. Calcium Chloride

Correct Answer: A. Pulsing involves loading flowers with sugars and ethylene inhibitors like STS to boost longevity.

4. 'Pink Flesh' in Guava is genetically controlled by:

• A. Single dominant gene
• B. Polygenes
• C. Single recessive gene
• D. Cytoplasmic inheritance

Correct Answer: A. Lycopene content/Pink flesh in guava is generally governed by a single dominant gene.

5. [PYQ 2023] Which bio-regulator is used for 'Thinning' in Grapes to improve berry size?

• A. ABA
• B. GA3
• C. NAA
• D. Cytokinin

Correct Answer: B. GA3 at the bloom stage is used for thinning and at the berry set stage for increasing berry size.

6. The 'Ultra-Dwarf' rootstock of Apple is:

• A. M.9
• B. M.27
• C. MM.106
• D. M.7

Correct Answer: B. M.27 is the ultra-dwarf rootstock, while M.9 is dwarf and MM.106 is semi-dwarf.

7. 'Whiptail' in Cauliflower is caused by the deficiency of:

• A. Nitrogen
• B. Molybdenum
• C. Boron
• D. Magnesium

Correct Answer: B. Molybdenum deficiency in acidic soils causes the leaf blade to fail to develop, leaving only the midrib.

8. Protandry is a common feature in which vegetable crop?

• A. Tomato
• B. Onion
• C. Chilli
• D. Brinjal

Correct Answer: B. Onion displays protandry (anthers mature before stigma), promoting cross-pollination.

9. In the processing of Cashew, the 'CNSL' stands for:

• A. Cashew Nut Shell Liquid
• B. Central Nut Sugar Level
• C. Cashew Nitrogen Soluble Liquid
• D. None of these

Correct Answer: A. CNSL is a versatile industrial byproduct extracted from the pericarp of the cashew nut.

10. The edible portion of Pomegranate is:

• A. Mesocarp
• B. Thalamus
• C. Succulent seed coat (Aril)
• D. Pericarp

Correct Answer: C. The juicy outgrowth of the seed coat, known as the aril, is the edible part.

Review the explanations above for better understanding!