How to Identify and Classify Grapes
  • 1. What is the primary characteristic used to initially identify grapes?
A) Leaf shape
B) Root depth
C) Vine thickness
D) Berry color
  • 2. Which grape is commonly known for its 'foxiness'?
A) Vitis labrusca
B) Vitis aestivalis
C) Vitis vinifera
D) Vitis riparia
  • 3. What is the term for the waxy coating on grape berries?
A) Pruinescence
B) Lenticels
C) Farina
D) Bloom
  • 4. Which species is responsible for the majority of wine grapes worldwide?
A) Vitis rotundifolia
B) Vitis labrusca
C) Vitis vinifera
D) Vitis riparia
  • 5. What is a key indicator when examining grape leaves for identification?
A) Leaf size only
B) Vein color only
C) Sinus shape
D) Petiole length only
  • 6. Which of these is a red grape variety?
A) Sauvignon Blanc
B) Cabernet Sauvignon
C) Riesling
D) Chardonnay
  • 7. What is the primary use of Vitis rotundifolia?
A) Fine wine production
B) Muscadine wines and fruit
C) Rootstock
D) Table grapes only
  • 8. What does 'terroir' refer to?
A) Environmental factors affecting grapes
B) Grape fermentation process
C) Grape pruning techniques
D) Grape vine root structure
  • 9. Which characteristic is NOT typically used to classify grapes?
A) Tannin structure
B) Acidity level
C) Berry size
D) Grape variety name length
  • 10. What is the purpose of using rootstock?
A) Improving fruit flavor directly
B) Increasing vine height
C) Resistance to pests and diseases
D) Changing berry color
  • 11. Which grape variety is known for its high acidity and citrus notes?
A) Riesling
B) Syrah
C) Merlot
D) Zinfandel
  • 12. What is the shape of the leaves of Vitis labrusca typically?
A) Round and pubescent
B) Long and narrow
C) Highly lobed and glabrous
D) Small and serrated
  • 13. Which grape variety is often associated with black pepper aromas?
A) Gamay
B) Sangiovese
C) Syrah/Shiraz
D) Pinot Noir
  • 14. What does 'phylloxera' refer to?
A) A root-feeding insect
B) A viral infection
C) A nutrient deficiency
D) A fungal disease
  • 15. Which is a characteristic of grapes grown in cooler climates?
A) Thicker skins
B) Higher acidity
C) Lower acidity
D) Higher sugar content
  • 16. What does 'clone' mean in viticulture?
A) Genetically identical vine
B) Hybrid of two species
C) Vine with a specific rootstock
D) Vine trained in a certain way
  • 17. Which white grape is known for its buttery flavor after malolactic fermentation?
A) Pinot Grigio
B) Sauvignon Blanc
C) Chardonnay
D) Gewürztraminer
  • 18. What is the name for the stalk that connects the grape berry to the bunch?
A) Petiole
B) Shoot
C) Rachis
D) Pedicel
  • 19. Which red grape is often described as having cherry and earthy notes?
A) Cabernet Sauvignon
B) Pinot Noir
C) Petite Sirah
D) Malbec
  • 20. What does the term 'tannins' refer to in wine?
A) Acidity levels
B) Sugar content
C) Phenolic compounds affecting structure
D) Alcohol percentage
  • 21. Which grape is often used in sparkling wines?
A) Pinot Meunier
B) Marsanne
C) Roussanne
D) Viognier
  • 22. What is the Vitis riparia species known for?
A) Its unique flavor characteristics.
B) Its resistance to phylloxera.
C) Its use in making high-quality table wines.
D) Its large berry size.
  • 23. What is the main purpose of pruning grape vines?
A) To control yield and vine shape
B) To change the color of grapes
C) To prevent diseases
D) To increase sugar concentration
  • 24. Which of these is a characteristic of a mature grape vine trunk?
A) Always perfectly straight.
B) Thin, green, and flexible.
C) Covered in thorns.
D) Thick, woody and gnarled.
  • 25. What does the term 'Brix' measure?
A) pH level in grapes
B) Tannin concentration in grapes
C) Acidity in grapes
D) Sugar content in grapes
  • 26. Which grape is commonly used in the production of Sauternes?
A) Albarino
B) Chenin Blanc
C) Grenache
D) Semillon
  • 27. What feature helps identify the difference between bunch types?
A) Shape of the stem
B) Size of the pedicel
C) Tightness of the grapes
D) Color of the grapes
  • 28. Which of the following is NOT a major consideration for grape classification?
A) The vineyard owner's name
B) Vintage
C) Geographical origin
D) Grape varietal
  • 29. What does 'Malolactic Fermentation' do?
A) Adds tannins to wine
B) Removes color from wine
C) Converts malic acid to lactic acid
D) Converts sugar to alcohol
  • 30. Which of these grapes is best known for its intense floral aroma?
A) Sauvignon Blanc
B) Viognier
C) Gewürztraminer
D) Vermentino
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