WSET Diploma D1 - Chapter 2 | Exam Questions with Correct Answers
and Answers with Verified Solutions | Latest 2026 Update
Q: have higher acidity. What happens to methoxypyrazine levels during ripening?
Answer:
They fall What can slow the rate of methoxypyrazine level drop? Cool temperature
Limited sunlight What is the impact on wine if methoxypyrazine levels do not fall?
Herbaceous aromas and flavors What to terpenes give to a wine Floral and citrus
aromas What natural resources impact aroma compounds and precursors? Heat and
Light
Q: How do tannin levels change during grape development High at verasion and
decrease slightly throughout ripening What happens to tannins during ripening
Tannins polymerise and become less bitter. How does sunshine impact tannins?
Answer:
Promotes tannin accumulation pre-verasion Promotes polymerise post-verasion What
happens to anthocyanins during ripening Increase What causes rapid increase of
anthocyanins? Sunlight Temperatures between 15-25C / 59-77F Four factors that
impact the length of ripening Varietal (early vs. late ripening) Climate conditions
(faster in warm, dry, shut down in veryhot, very dry) Vineyard management (crop
load, shading, shoot growth) Time of harvest (human - wine style or natural - rain
and disease) What occurs during extra-ripening? No sugar or water is imported into
grapes by phloem Water loss in grapes due to transpiration Sugars are concentrated
Grapes shrivel Extra-ripening aromas can develop
, Q: Grape shrivelling is most likely in what environmental conditions?
Answer:
Hot Sunny Dry climates What varietal is susceptible to grape shrivelling? Syrah The
ability to leave grapes on the vine for extra-ripening depends on what 2 factors?
Weather conditions Disease pressure Key parameters for determining ripeness is?
Sugar levels Aromas/flavors Tannins (red wines) How does sugar level of grapes
impact dry wines? Alcohol How does sugar level of grapes impact sweet wines?
Sweetness of final wine Alcohol How do aromas/flavors of grapes evolve Under-ripe
and Herbaceous Fresh fruit Riper fruit Jammy or cooked What is the impact of
residual sugar on the perception of tannin? Appear softer
Q: What is the impact of high acidity in dry wines?
Answer:
More astringency What happens to green shoots post-harvest Become woody and
rigid Become "canes" Leaves fall Carb reserves are stored in roots Vines enter
dormant period What is the vine growth cycle (7)? Dormancy Budburst Shoot and
leaf growth Flowering and fruit set Grape development Harvest Leaf fall and
dormancy What are the vine's needs (5)? Warmth Sunlight Water Nutrients Carbon
Dioxide What does the vine's ability to produce and ripen grapes mean (4)? Yield per
vine Health of vine and grapes Levels and balance of grape components
and Answers with Verified Solutions | Latest 2026 Update
Q: have higher acidity. What happens to methoxypyrazine levels during ripening?
Answer:
They fall What can slow the rate of methoxypyrazine level drop? Cool temperature
Limited sunlight What is the impact on wine if methoxypyrazine levels do not fall?
Herbaceous aromas and flavors What to terpenes give to a wine Floral and citrus
aromas What natural resources impact aroma compounds and precursors? Heat and
Light
Q: How do tannin levels change during grape development High at verasion and
decrease slightly throughout ripening What happens to tannins during ripening
Tannins polymerise and become less bitter. How does sunshine impact tannins?
Answer:
Promotes tannin accumulation pre-verasion Promotes polymerise post-verasion What
happens to anthocyanins during ripening Increase What causes rapid increase of
anthocyanins? Sunlight Temperatures between 15-25C / 59-77F Four factors that
impact the length of ripening Varietal (early vs. late ripening) Climate conditions
(faster in warm, dry, shut down in veryhot, very dry) Vineyard management (crop
load, shading, shoot growth) Time of harvest (human - wine style or natural - rain
and disease) What occurs during extra-ripening? No sugar or water is imported into
grapes by phloem Water loss in grapes due to transpiration Sugars are concentrated
Grapes shrivel Extra-ripening aromas can develop
, Q: Grape shrivelling is most likely in what environmental conditions?
Answer:
Hot Sunny Dry climates What varietal is susceptible to grape shrivelling? Syrah The
ability to leave grapes on the vine for extra-ripening depends on what 2 factors?
Weather conditions Disease pressure Key parameters for determining ripeness is?
Sugar levels Aromas/flavors Tannins (red wines) How does sugar level of grapes
impact dry wines? Alcohol How does sugar level of grapes impact sweet wines?
Sweetness of final wine Alcohol How do aromas/flavors of grapes evolve Under-ripe
and Herbaceous Fresh fruit Riper fruit Jammy or cooked What is the impact of
residual sugar on the perception of tannin? Appear softer
Q: What is the impact of high acidity in dry wines?
Answer:
More astringency What happens to green shoots post-harvest Become woody and
rigid Become "canes" Leaves fall Carb reserves are stored in roots Vines enter
dormant period What is the vine growth cycle (7)? Dormancy Budburst Shoot and
leaf growth Flowering and fruit set Grape development Harvest Leaf fall and
dormancy What are the vine's needs (5)? Warmth Sunlight Water Nutrients Carbon
Dioxide What does the vine's ability to produce and ripen grapes mean (4)? Yield per
vine Health of vine and grapes Levels and balance of grape components
