10.3 Fermentation Quiz

Fermentation is a chemical reaction that occurs in the _______. Because it is _______, fermentation _______ oxygen.

• cytoplasm, anaerobic, does not require

• matrix, aerobic, requires

• membrane, aerobic, requires

• mitochondria, aerobic, requires

Tags

NGSS.HS-LS2-3

Compared to cellular respiration, lactic acid fermentation generates _______ ATP and is less efficient.

• much more

• much less

• the same amount

• no

Tags

NGSS.HS-LS1-7

NGSS.HS-LS2-3

During fermentation, how do changes to a molecule of pyruvic acid contribute to the formation of ATP?

• a. They complete the oxidation of glucose to CO2, creating ATP.

• b. They generate lactic acid, which cycles back through the Krebs cycle, producing 2 ATP molecules.

• c. They convert FADH2 to a phosphate group, which bonds with ADP.

• d. They produce 2 NAD+ molecules, which cycle back to fuel the glycolysis reaction, producing 2 ATP molecules.

Tags

NGSS.HS-LS2-3

Most bread rises primarily due to the CO2 produced during alcoholic fermentation as yeast feeds on sugars. Sourdough bread is unique in that it also has an initial stage, and requires a "starter" to act as a leavening agent. Michaela keeps a sourdough starter, refreshing it often to keep the starter alive and active. She adds a portion of the starter to dough when making sourdough bread. What is the BEST description of the process that occurs in the starter to give sourdough bread its famous tangy flavor?

• Citric acid is produced in the citric acid cycle as the starter undergoes fermentation.

• Lactic acid is produced from Lactobacillus as the starter undergoes fermentation.

• Acetic acid is formed from the enzymatic oxidation of ethyl alcohol as the starter undergoes fermentation.

• Pyruvic acid is produced from the enzymatic reduction of glucose as the starter undergoes fermentation.

On a backpacking trip, Kenny hikes all day at a steady pace, covering 30 kilometers and burning 4000 Calories. At the school track, Janelle runs the 100-meter sprint in 13.5 seconds, burning 10 Calories. Afterward, Janelle’s leg muscles are aching and she is breathing hard, while Kenny maintains normal breathing all day, even though he burns 400 times more calories than Janelle. Which two statements offer the BEST explanation for this phenomenon? Select two answer choices.

• If the aerobic pathway—cellular respiration—cannot meet the energy demand, then the anaerobic pathway—lactic acid fermentation—starts up, resulting in lactic acid buildup and “oxygen debt.”

• Aerobic cellular respiration produces more energy, but its use is limited because of lactic acid buildup in the muscles and the resulting “oxygen debt.”

• After about 90 seconds of intense exercise, the muscles become depleted of oxygen, and anaerobic respiration can no longer function to produce ATP, resulting in “oxygen debt.”

• The rate of energy demand determines how the muscles will obtain energy, either from cellular respiration or from lactic acid fermentation if not enough oxygen is present.

Tags

NGSS.HS-LS1-7

Which describes a tissue in the human body that will most likely undergo anaerobic respiration?

• stomach muscles as they churn food

• heart muscle during normal heart function

• skeletal muscle near the end of an intense exercise session

• skin tissue in a foot, which is far from the heart and lungs

Tags

NGSS.HS-LS2-3

Glycolysis means “___________”.

• “sugar-breaking”

• "sugar-making"

• "sugar-hating"

• "sugar-loving"

The Krebs cycle is also known as the “___________”

• citric acid cycle

• lactic acid cycle

• Calvin cycle

• carbon cycle

• Acetic acid is joined to a compound called coenzyme A--- together they’re referred to as _______.

• NAD+

• NADH

• FADH

• • acetyl-CoA

• Together, glycolysis, the Krebs cycle, and electron transport release about __molecules of ATP per molecule of glucose.

• 52

• 36

• 12

• 4

Tags

NGSS.HS-LS1-7