1. The edible portion of carrot is:
A. Stem
B. Leaf
C. Root
D. Hypocotyl and taproot
Answer: D
Rationale: The carrot edible part consists of swollen hypocotyl and taproot.
2. Carrot belongs to the family:
A. Brassicaceae
B. Apiaceae
C. Solanaceae
D. Amaranthaceae
Answer: B
Rationale: Carrot is a member of the Apiaceae (Umbelliferae) family.
3. The scientific name of carrot is:
A. Daucus sativus
B. Daucus carota
C. Raphanus sativus
D. Beta vulgaris
Answer: B
Rationale: Daucus carota L. is the botanical name.
4. Carrot is primarily a:
A. Warm-season crop
B. Perennial crop
C. Cool-season crop
D. Tropical crop
Answer: C
Rationale: Carrot grows best under cool climatic conditions.
5. The optimum temperature for carrot root development is:
A. 10–15°C
B. 15–20°C
C. 25–30°C
D. 30–35°C
Answer: B
Rationale: Ideal root development occurs at 15–20°C.
6. High temperature during carrot growth leads to:
A. Better color
B. Smooth roots
C. Bitter taste and poor quality
D. Increased carotene
Answer: C
Rationale: High temperature causes bitterness and poor root quality.
7. Carrot is propagated by:
A. Vegetative cuttings
B. Tubers
C. Seeds
D. Suckers
Answer: C
Rationale: Carrot is propagated through seeds.
8. Carrot is classified as a:
A. Annual crop
B. Biennial crop
C. Perennial crop
D. Seasonal crop only
Answer: B
Rationale: Carrot completes vegetative growth in the first year and seed production in the second.
9. The inflorescence of carrot is:
A. Spike
B. Panicle
C. Umbel
D. Raceme
Answer: C
Rationale: Carrot produces compound umbels.
10. Carrot flowers are:
A. Self-pollinated
B. Cross-pollinated
C. Cleistogamous
D. Apomictic
Answer: B
Rationale: Carrot is highly cross-pollinated, mainly by insects.
11. The pollination in carrot is mainly by:
A. Wind
B. Water
C. Insects
D. Birds
Answer: C
Rationale: Insect pollination (entomophily) predominates.
12. The chromosome number of carrot is:
A. 2n = 14
B. 2n = 16
C. 2n = 18
D. 2n = 20
Answer: C
Rationale: Carrot has 2n = 18 chromosomes.
13. Carrot prefers which type of soil?
A. Heavy clay
B. Sandy loam
C. Saline soil
D. Waterlogged soil
Answer: B
Rationale: Sandy loam soils allow straight root development.
14. Heavy soils cause carrot roots to:
A. Grow straight
B. Become forked and deformed
C. Increase sweetness
D. Mature early
Answer: B
Rationale: Compacted soils restrict root growth.
15. The optimum soil pH for carrot cultivation is:
A. 4.5–5.0
B. 5.0–5.5
C. 6.0–6.8
D. 7.5–8.5
Answer: C
Rationale: Slightly acidic to neutral soils are ideal.
16. Carrot is rich in:
A. Vitamin C
B. Vitamin D
C. Vitamin A (β-carotene)
D. Vitamin K
Answer: C
Rationale: Carrot is a major source of β-carotene.
17. The orange color of carrot is due to:
A. Lycopene
B. Anthocyanin
C. Carotene
D. Chlorophyll
Answer: C
Rationale: β-carotene gives orange color.
18. Purple carrots contain high amounts of:
A. Carotene
B. Anthocyanin
C. Flavonoids only
D. Chlorophyll
Answer: B
Rationale: Purple color is due to anthocyanins.
19. Carrot varieties are broadly classified based on:
A. Root color
B. Root shape
C. Root length
D. All of the above
Answer: D
Rationale: Classification is based on color, shape, and size.
20. Which is an Asiatic (tropical) carrot variety?
A. Nantes
B. Danvers
C. Pusa Kesar
D. Imperator
Answer: C
Rationale: Pusa Kesar is an Asiatic type.
21. European carrots are generally:
A. Short and thick
B. Long and orange
C. Purple and pungent
D. White and fibrous
Answer: B
Rationale: European carrots are long, smooth, and orange.
22. Asiatic carrots are usually:
A. Sweet and orange
B. Less sweet and colored
C. Very short
D. Seedless
Answer: B
Rationale: Asiatic carrots are less sweet and often red or purple.
23. The recommended seed rate for carrot is about:
A. 1–2 kg/ha
B. 3–4 kg/ha
C. 5–6 kg/ha
D. 8–10 kg/ha
Answer: B
Rationale: About 3–4 kg seed per hectare is recommended.
24. Carrot seeds take how many days to germinate?
A. 3–5 days
B. 5–7 days
C. 7–10 days
D. 15–20 days
Answer: C
Rationale: Germination usually occurs in 7–10 days.
25. Carrot seed viability is relatively:
A. Very high (10 years)
B. High (5–6 years)
C. Moderate (2–3 years)
D. Very low (1 year)
Answer: C
Rationale: Seed viability lasts about 2–3 years.
26. Thinning in carrot is necessary to:
A. Increase germination
B. Prevent overcrowding
C. Improve seed viability
D. Increase flowering
Answer: B
Rationale: Thinning ensures proper root size and shape.
27. Deficiency of boron in carrot causes:
A. Yellow leaves
B. Root cracking and hollow heart
C. Leaf curling
D. Reduced branching
Answer: B
Rationale: Boron deficiency leads to physiological disorders.
28. Excess nitrogen in carrot leads to:
A. Better root color
B. Excessive top growth and poor roots
C. Early maturity
D. Increased sugar content
Answer: B
Rationale: Excess nitrogen favors leaves over roots.
29. The most critical stage for irrigation in carrot is:
A. Germination and root development
B. Flowering
C. Seed setting
D. Maturity
Answer: A
Rationale: Moisture stress affects root formation.
30. Irregular irrigation in carrot results in:
A. Uniform roots
B. Root cracking
C. Better taste
D. Early harvest
Answer: B
Rationale: Moisture fluctuation causes cracking.
31. Carrot is usually harvested when roots are:
A. Fully mature and woody
B. Tender and well-developed
C. Flowering begins
D. Leaves dry completely
Answer: B
Rationale: Harvesting at tender stage ensures quality.
32. The average crop duration of carrot is:
A. 45–60 days
B. 60–75 days
C. 75–90 days
D. 120–150 days
Answer: C
Rationale: Carrot matures in about 75–90 days.
33. Carrot is sensitive to:
A. Salinity
B. Alkalinity
C. Waterlogging
D. All of the above
Answer: D
Rationale: Carrot does not tolerate stress conditions.
34. The major insect pest of carrot is:
A. Fruit borer
B. Aphid
C. Root fly
D. Whitefly
Answer: C
Rationale: Carrot root fly damages roots.
35. The common fungal disease of carrot is:
A. Early blight
B. Powdery mildew
C. Alternaria leaf blight
D. Rust
Answer: C
Rationale: Alternaria leaf blight is common.
36. Carrot seed production requires:
A. High temperature
B. Vernalization
C. Long-day conditions only
D. Heavy rainfall
Answer: B
Rationale: Vernalization is needed for flowering.
37. Vernalization in carrot occurs at:
A. 0–2°C
B. 2–5°C
C. 4–8°C
D. 10–15°C
Answer: C
Rationale: Low temperature induces flowering.
38. The method of seed production in carrot is:
A. Seed-to-seed
B. Root-to-seed
C. Cutting-to-seed
D. Tissue culture
Answer: B
Rationale: Roots are replanted for seed production.
39. Isolation distance required for carrot seed production is:
A. 50 m
B. 100 m
C. 800 m
D. 1600 m
Answer: C
Rationale: Large isolation is needed due to cross-pollination.
40. Carrot roots become green when:
A. Exposed to sunlight
B. Grown in sandy soil
C. Harvested late
D. Nitrogen is deficient
Answer: A
Rationale: Sunlight exposure induces chlorophyll.
41. Carrot tops turning bitter is due to:
A. Low temperature
B. High temperature
C. Boron deficiency
D. Potassium excess
Answer: B
Rationale: Heat stress increases bitterness.
42. The TSS content of carrot is higher in:
A. Young roots
B. Overmature roots
C. Well-matured roots
D. Fibrous roots
Answer: C
Rationale: Sugar accumulation peaks at proper maturity.
43. Carrot is commonly used for:
A. Pickling only
B. Salad and cooking
C. Oil extraction
D. Beverage fermentation only
Answer: B
Rationale: Carrot is widely used fresh and cooked.
44. Carrot is best suited for which cropping season in India?
A. Kharif
B. Rabi
C. Zaid
D. Summer
Answer: B
Rationale: Carrot is mainly grown as a rabi crop.
45. The major storage problem in carrot is:
A. Sprouting
B. Wilting and decay
C. Hardening
D. Oil loss
Answer: B
Rationale: High moisture loss causes wilting.
46. Pre-cooling carrots after harvest helps in:
A. Increasing sweetness
B. Extending shelf life
C. Enhancing color
D. Increasing size
Answer: B
Rationale: Pre-cooling reduces respiration.
47. Carrot roots are graded mainly based on:
A. Color
B. Shape and size
C. Taste
D. Weight only
Answer: B
Rationale: Uniformity improves market value.
48. The pungency in Asiatic carrots is due to:
A. High sugar
B. High moisture
C. Presence of terpenoids
D. Lack of carotene
Answer: C
Rationale: Terpenoid compounds cause pungency.
49. Carrot juice is valued mainly for:
A. Protein content
B. Vitamin A content
C. Fat content
D. Mineral oil
Answer: B
Rationale: It is rich in provitamin A.
50. Carrot crop is best described as:
A. High-input crop only
B. Low-value crop
C. Nutritious root vegetable crop
D. Oilseed crop
Answer: C
Rationale: Carrot is a nutritious and important root vegetable.
%20(2).png)
0 Comments