Question

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1. fermentation enables respiration to continue under

a. aerobic conditions
b. anaerobic conditions
c. photosynthetic conditions
d. none of the above

1. which of the following products is not a result of alcohol fermentation?

a. wine/beer
b. grapes
c. soy sauce
d. sourdough bread

1. when working out, why does our heart have to beat faster and our lungs have to breathe harder?

a. because we are out of shape and dont do photosynthesis
b. because there is not enough carbon dioxide going into our lungs
c. because the body is eating glucose for cellular respiration
d. because the body needs more oxygen for cellular respiration

1. during a workout we feel the burn of sore muscles because...

a. they did alcohol fermentation
b. they did pyruvic acid fermentation
c. they did ethanol fermentation
d. they did lactic acid fermentation
use the picture of the seed on the right to answer questions 25 - 26

1. if seeds are underground when they are planted, can they do photosynthesis?

a. no, because the soil hides them from the sunlight
b. no, because they do not have access to water
c. yes, because theyre considered baby plants
d. yes, because they can do the light independent reaction 1st

1. seeds must do cellular respiration until they break through the

soil. which food source is most likely stored inside a seed?
a. glucose sugar
b. meat
c. sunlight
d. vegetable

Explanation:

• Question 21: Fermentation is an anaerobic process (does not require oxygen). So it enables respiration (in a sense of energy production via fermentation pathways) under anaerobic conditions.
• Question 22: Grapes are a raw material. Wine/beer is made via alcohol fermentation, soy sauce involves some fermentation processes (though complex, can be related to microbial activity which may have fermentation - like steps in some traditional processes, but grapes themselves are not a product of alcohol fermentation. Sourdough bread has yeast fermentation (alcohol fermentation by yeast produces CO₂ which makes the bread rise).
• Question 23: During exercise, the body's demand for energy (ATP) increases. Cellular respiration (which requires oxygen) is the main way to produce ATP. So the heart beats faster and lungs work harder to supply more oxygen for cellular respiration.
• Question 24: In muscle cells during intense exercise (when oxygen supply is limited), lactic acid fermentation occurs. Pyruvic acid is converted to lactic acid. Alcohol/ethanol fermentation occurs in yeast (not in human muscle cells during normal "burn" situations).
• Question 25: Photosynthesis requires sunlight. If seeds are underground, they don't have access to sunlight, so they can't do photosynthesis.
• Question 26: Seeds store food in the form of substances like starch (which can be broken down to glucose). Glucose sugar (or its storage forms like starch) is a common energy - storage molecule in plants (including seeds). Meat is from animals, sunlight is an energy source but not stored as food in seeds in the way the question implies, and vegetable is a very broad term and not the stored food source in the context of seed cellular respiration.

Answer:

1. B. anaerobic conditions
2. B. Grapes
3. D. Because the body needs more oxygen for cellular respiration
4. D. They did lactic acid fermentation
5. B. No, because they do not have access to sunlight
6. A. Glucose sugar