1. Grapes belong to the family:
A. Rosaceae
B. Vitaceae
C. Rutaceae
D. Oleaceae
Answer: B
Rationale: Grape is classified under the family Vitaceae.
2. The botanical name of cultivated grape is:
A. Vitis vinifera
B. Vitis labrusca
C. Vitis rotundifolia
D. Vitis riparia
Answer: A
Rationale: Vitis vinifera is the main cultivated species worldwide.
3. The center of origin of Vitis vinifera is:
A. Central America
B. Mediterranean–West Asia region
C. China
D. South Africa
Answer: B
Rationale: Grapes originated in the Near East and Mediterranean region.
4. Grapevine is botanically a:
A. Tree
B. Shrub
C. Climber
D. Herb
Answer: C
Rationale: Grapevine is a perennial woody climber.
5. The economic part of grape is:
A. Berry
B. Drupe
C. Capsule
D. Pome
Answer: A
Rationale: Grape fruit is botanically a berry.
6. Grapes are generally propagated by:
A. Seeds
B. Cuttings
C. Grafting
D. Budding
Answer: B
Rationale: Hardwood cuttings are the most common method.
7. Rootstocks are mainly used in grape cultivation to manage:
A. Frost injury
B. Soil salinity and nematodes
C. Pollination
D. Fruit color
Answer: B
Rationale: Rootstocks confer tolerance to soil problems.
8. Which grape rootstock is tolerant to salinity?
A. Dogridge
B. Thompson Seedless
C. Anab-e-Shahi
D. Perlette
Answer: A
Rationale: Dogridge is widely used for saline soils.
9. The chromosome number of grape is:
A. 2n = 18
B. 2n = 24
C. 2n = 38
D. 2n = 40
Answer: C
Rationale: Grapes have 2n = 38 chromosomes.
10. Grapes require which climatic condition?
A. Hot and humid
B. Cool and humid
C. Warm and dry
D. Cold and dry
Answer: C
Rationale: Dry climate during ripening improves fruit quality.
11. The most suitable soil for grape cultivation is:
A. Heavy clay
B. Waterlogged soil
C. Well-drained loam
D. Peaty soil
Answer: C
Rationale: Good drainage is essential for grapevines.
12. The ideal soil pH for grapes is:
A. 4.0–5.0
B. 5.5–7.5
C. 7.5–9.0
D. Above 9.0
Answer: B
Rationale: Grapes prefer slightly acidic to neutral soils.
13. Which grape variety is most popular for table purpose in India?
A. Anab-e-Shahi
B. Thompson Seedless
C. Bangalore Blue
D. Arkavati
Answer: B
Rationale: Thompson Seedless dominates table grape cultivation.
14. Bangalore Blue grape belongs to the species:
A. Vitis vinifera
B. Vitis labrusca
C. Vitis rotundifolia
D. Vitis riparia
Answer: B
Rationale: Bangalore Blue is a V. labrusca type.
15. The inflorescence of grape is a:
A. Panicle
B. Cyme
C. Raceme
D. Umbel
Answer: C
Rationale: Grape bears flowers in racemes.
16. The edible portion of grape is mainly:
A. Epicarp
B. Mesocarp
C. Endocarp
D. Seed coat
Answer: B
Rationale: The fleshy mesocarp forms the edible pulp.
17. Grapes are mainly pollinated by:
A. Wind
B. Bees
C. Flies
D. Self-pollination
Answer: D
Rationale: Most cultivated grapes are self-pollinated.
18. Berry set in grapes is influenced by:
A. Light intensity
B. Temperature during flowering
C. Soil texture
D. Wind speed
Answer: B
Rationale: Extreme temperatures reduce fruit set.
19. The practice of removing excess shoots in grapevine is called:
A. Training
B. Pruning
C. Thinning
D. Disbudding
Answer: D
Rationale: Disbudding regulates vine growth.
20. Which training system is most popular for grapes in India?
A. Bower system
B. Kniffin system
C. Head system
D. Tatura trellis
Answer: A
Rationale: Bower system maximizes yield in tropical conditions.
21. The pruning season for grapes in tropical India is:
A. Summer only
B. Winter only
C. Twice a year
D. Once in two years
Answer: C
Rationale: Grapes require both foundation and fruit pruning.
22. The phenomenon of berry drop after fruit set is called:
A. Coulure
B. Millerandage
C. Shattering
D. Cracking
Answer: C
Rationale: Shattering refers to berry drop.
23. Millerandage in grapes results in:
A. Seedless berries
B. Small and uneven berries
C. Cracked berries
D. Poor coloration
Answer: B
Rationale: Poor fertilization causes uneven berry size.
24. Which growth regulator is used to increase berry size in grapes?
A. NAA
B. GA₃
C. CCC
D. Ethrel
Answer: B
Rationale: GA₃ promotes berry elongation and size.
25. Girdling in grapes is practiced to:
A. Control pests
B. Improve berry size and sweetness
C. Induce flowering
D. Prevent diseases
Answer: B
Rationale: Girdling accumulates carbohydrates above the ring.
26. The most important nutrient for grape quality is:
A. Nitrogen
B. Phosphorus
C. Potassium
D. Calcium
Answer: C
Rationale: Potassium improves sugar accumulation.
27. Iron deficiency in grape causes:
A. Leaf scorching
B. Interveinal chlorosis of young leaves
C. Little leaf
D. Berry cracking
Answer: B
Rationale: Iron deficiency leads to chlorosis.
28. Powdery mildew of grape is caused by:
A. Phytophthora
B. Plasmopara viticola
C. Uncinula necator
D. Colletotrichum
Answer: C
Rationale: Powdery mildew is caused by U. necator.
29. Downy mildew of grape is caused by:
A. Alternaria spp.
B. Plasmopara viticola
C. Fusarium spp.
D. Botrytis spp.
Answer: B
Rationale: A serious fungal disease in humid climates.
30. Anthracnose of grape is also known as:
A. Black rot
B. Bird’s eye spot
C. Leaf blight
D. Crown rot
Answer: B
Rationale: Lesions resemble a bird’s eye.
31. The major insect pest of grape berries is:
A. Thrips
B. Flea beetle
C. Mealybug
D. Aphid
Answer: C
Rationale: Mealybugs damage clusters and spread diseases.
32. Grape berries are considered:
A. Climacteric
B. Non-climacteric
C. Semi-climacteric
D. Post-climacteric
Answer: B
Rationale: Grapes do not ripen after harvest.
33. Harvest maturity in grapes is judged by:
A. Berry size
B. Berry color
C. TSS level
D. Acidity alone
Answer: C
Rationale: Total soluble solids indicate sweetness.
34. The optimum TSS for table grapes is around:
A. 10–12 °Brix
B. 12–14 °Brix
C. 16–20 °Brix
D. 22–25 °Brix
Answer: C
Rationale: High TSS ensures good taste.
35. Which grape variety is used mainly for wine making?
A. Thompson Seedless
B. Anab-e-Shahi
C. Cabernet Sauvignon
D. Perlette
Answer: C
Rationale: Cabernet Sauvignon is a wine grape.
36. Berry cracking in grapes is mainly due to:
A. Boron deficiency
B. Calcium deficiency
C. Sudden irrigation after drought
D. Excess potassium
Answer: C
Rationale: Rapid water uptake causes cracking.
37. The practice of removing excess berries from a cluster is called:
A. Thinning
B. Pruning
C. Training
D. Pinching
Answer: A
Rationale: Thinning improves berry size and quality.
38. Grape leaves are arranged in:
A. Opposite
B. Whorled
C. Alternate
D. Spiral
Answer: C
Rationale: Leaves are alternately arranged.
39. The main carbohydrate stored in grapevine is:
A. Glucose
B. Fructose
C. Starch
D. Sucrose
Answer: C
Rationale: Starch reserves support next season growth.
40. Which irrigation method is best for grapes?
A. Flood irrigation
B. Basin irrigation
C. Sprinkler irrigation
D. Drip irrigation
Answer: D
Rationale: Drip improves water and nutrient efficiency.
41. The economic life of a grapevine is about:
A. 5–10 years
B. 10–15 years
C. 20–30 years
D. 50–60 years
Answer: C
Rationale: Vines remain productive for decades.
42. Which micronutrient deficiency causes poor berry set?
A. Zinc
B. Iron
C. Copper
D. Manganese
Answer: A
Rationale: Zinc affects flowering and fruit set.
43. Raisins are prepared from which type of grapes?
A. Seeded grapes
B. Acid grapes
C. Seedless grapes
D. Wild grapes
Answer: C
Rationale: Seedless varieties are preferred for raisins.
44. The drying of grapes for raisins is commonly done by:
A. Shade drying
B. Sun drying
C. Freeze drying
D. Smoke drying
Answer: B
Rationale: Sun drying is traditional and economical.
45. The disorder “hen and chicken” in grapes refers to:
A. Uneven berry ripening
B. Small and large berries in same cluster
C. Berry drop
D. Berry cracking
Answer: B
Rationale: Same as millerandage.
46. Which grape variety is suitable for juice preparation in South India?
A. Thompson Seedless
B. Bangalore Blue
C. Perlette
D. Flame Seedless
Answer: B
Rationale: Bangalore Blue is used for juice and processing.
47. Grapevines require dormancy breaking in tropics using:
A. GA₃
B. Ethrel
C. Hydrogen cyanamide
D. CCC
Answer: C
Rationale: Hydrogen cyanamide induces uniform bud break.
48. Which factor most affects grape color development?
A. Nitrogen level
B. Light exposure
C. Soil texture
D. Rootstock
Answer: B
Rationale: Sunlight enhances anthocyanin synthesis.
49. The pruning severity in grapes depends mainly on:
A. Soil fertility
B. Variety and bud fruitfulness
C. Irrigation method
D. Pest incidence
Answer: B
Rationale: Bud fruitfulness varies with cultivar.
50. Grapes are rich in which antioxidant?
A. Lycopene
B. Resveratrol
C. Carotene
D. Ascorbic acid
Answer: B
Rationale: Resveratrol has health-protective properties.
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