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How to Identify and Classify Grapefruits
Contributed by: Woolley
  • 1. What is the most common color of grapefruit pulp?
A) Blue
B) Pink/Red
C) Purple
D) Green
  • 2. Which characteristic helps differentiate a grapefruit from an orange?
A) Smoother peel
B) Larger size and flattened shape
C) Sweeter taste
D) Brighter orange peel
  • 3. What is the general taste profile of a grapefruit?
A) Sweet and tangy
B) Tart and slightly bitter
C) Bland and watery
D) Spicy and sour
  • 4. Which grapefruit variety is known for its deep red flesh?
A) Rio Red
B) Marsh
C) Duncan
D) Oro Blanco
  • 5. What is the skin texture of a typical grapefruit?
A) Shiny and waxy
B) Very rough and hard
C) Smooth and thin
D) Slightly bumpy and thick
  • 6. What is the blossom end of a grapefruit?
A) The stem end
B) The end opposite the stem
C) The area with the strongest aroma
D) The side with the most blemishes
  • 7. Which of these is a seedless grapefruit variety?
A) White Marsh
B) Ruby Red
C) Duncan
D) Thompson
  • 8. What is the approximate diameter of a medium-sized grapefruit?
A) 4-6 inches
B) 8-10 inches
C) 1-2 inches
D) 12-14 inches
  • 9. The color intensity of red grapefruit is influenced by?
A) Sugar content
B) Lycopene content
C) Vitamin C content
D) Acidity levels
  • 10. Which grapefruit variety has a yellow peel and white flesh?
A) Star Ruby
B) Flame
C) Ray Ruby
D) Marsh White
  • 11. What is the typical weight of a large grapefruit?
A) Less than 0.5 pound
B) 1-2 pounds
C) 3.5-4 pounds
D) 2.5-3 pounds
  • 12. What does 'specific gravity' indicate in grapefruits?
A) Seed count
B) Pesticide residue
C) Juice content and density
D) Vitamin content
  • 13. Grapefruit are categorized as?
A) Stone fruits
B) Berry fruits
C) Citrus fruits
D) Pome fruits
  • 14. Which country is a major producer of grapefruits?
A) Russia
B) Japan
C) United States
D) Germany
  • 15. What growing condition affects grapefruit sweetness?
A) Dense shade
B) High altitude
C) Ample sunshine
D) Excessive rain
  • 16. What is the name for the individual sections inside the grapefruit?
A) Cysts
B) Arils
C) Pomes
D) Segments
  • 17. Which term describes the grapefruit's outer layer?
A) Hypocarp
B) Exocarp
C) Endocarp
D) Mesocarp
  • 18. What is the term for the white, spongy tissue between the peel and pulp?
A) Pith
B) Rind
C) Albedo
D) Zest
  • 19. Which grapefruit variety is known for its low acid content?
A) Duncan
B) Thompson
C) Oro Blanco
D) Ruby Red
  • 20. How can you visually assess the ripeness of a grapefruit?
A) Bright green peel
B) Heavy for its size
C) Rock hard feel
D) Very light for its size
  • 21. Which nutrient is abundant in grapefruits?
A) Iron
B) Vitamin B12
C) Vitamin C
D) Calcium
  • 22. What climate is ideal for growing grapefruits?
A) Temperate
B) Arctic
C) Desert
D) Subtropical
  • 23. What does 'thin-skinned' refer to in grapefruit context?
A) A grapefruit with very little flavor
B) A grapefruit susceptible to bruising
C) A peel that is easy to remove
D) A small grapefruit
  • 24. Why are some grapefruits treated with ethylene gas?
A) To reduce acidity
B) To improve color
C) To increase sweetness
D) To extend shelf life
  • 25. Which of these characteristics indicates a higher quality grapefruit?
A) Soft spots
B) Very light weight
C) Smooth, unblemished skin
D) Numerous scars on the peel
  • 26. How should grapefruits be stored for optimal freshness?
A) At room temperature in sunlight
B) In a sealed plastic bag
C) Frozen
D) Refrigerated
  • 27. What is the main season for grapefruit harvest in many regions?
A) Summer
B) Winter
C) Spring
D) Autumn
  • 28. Which of these is NOT a common use for grapefruits?
A) Making juice
B) In salads
C) Making jam
D) Eating fresh
  • 29. What is the botanical name for grapefruit?
A) Citrus limon
B) Malus domestica
C) Citrus × paradisi
D) Citrus sinensis
  • 30. What is the effect of grapefruit juice on some medications?
A) It completely negates the effects of the medication.
B) It has no effect on medications.
C) It can interact with enzymes that metabolize drugs.
D) It always enhances the effects of the medication.
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