$$6 \ CO_2$ + 6 \ H_2O + \text{light energy} \rightarrow C_6H_{12}O_6$ + 6 \ O_2$

Question 1

Which of the following best describes the main purpose of fermentation in cells?

Accepted Answer

To regenerate NAD+ so glycolysis can continue producing ATP in the absence of oxygen.

Question 2

Where does glycolysis, the first step of fermentation, occur in eukaryotic cells?

Accepted Answer

In the cytoplasm.

Question 3

Which of the following is a product of lactic acid fermentation in human muscle cells?

Accepted Answer

Lactate

Question 4

During alcoholic fermentation in yeast, which of the following is released as a byproduct?

Accepted Answer

CO$$_2$$

Question 5

Which equation correctly summarizes the overall process of photosynthesis?

Accepted Answer

$$6 \ CO_2$ + 6 \ H_2O + 	ext{light energy} ightarrow C_6H_{12}O_6$ + 6 \ O_2$

Question 6

What is the primary function of stomata in plant leaves?

Accepted Answer

To allow gas exchange of CO$$_2$$ and O$$_2$$ between the plant and the atmosphere.

Question 7

Which of the following statements about autotrophs is correct?

Accepted Answer

They obtain energy and carbon entirely from nonliving sources.

Question 8

In the absence of oxygen, which pathway do human muscle cells use to continue producing ATP?

Accepted Answer

Lactic acid fermentation

Question 9

Which of the following is a direct product of glycolysis?

Accepted Answer

Pyruvate

Question 10

What is the main role of NAD+ in fermentation?

Accepted Answer

To accept electrons during glycolysis and be regenerated during fermentation.

Question 11

Which of the following best explains why fermentation is considered less efficient than aerobic respiration?

Accepted Answer

Fermentation produces only 2 net ATP per glucose, while aerobic respiration produces up to 32 ATP.

Question 12

Which of the following is NOT a product of alcoholic fermentation?

Accepted Answer

Lactate

Question 13

Which structure within the chloroplast is the site of the light reactions of photosynthesis?

Accepted Answer

Thylakoid membrane

Question 14

During photosynthesis, which molecule is oxidized and which is reduced?

Accepted Answer

H$$_2O is $$oxidized and CO$$_2 is $$reduced.

Question 15

A yeast cell is placed in an anaerobic environment with abundant glucose. Which of the following will most likely be observed?

Accepted Answer

Production of ethanol and CO$$_2$$

Question 16

Which of the following best describes the relationship between the light reactions and the Calvin cycle in photosynthesis?

Accepted Answer

The light reactions provide ATP and NADPH to the Calvin cycle.

Question 17

A plant is exposed to a toxin that specifically inhibits the regeneration of NAD+. Which process will be directly affected?

Accepted Answer

Glycolysis

Question 18

Which of the following is a correct statement about heterotrophs?

Accepted Answer

They obtain energy and carbon from organic material derived from other organisms.

Question 19

In a scenario where a plant's stomata are closed during the day to prevent water loss, which process is most directly affected?

Accepted Answer

CO$$_2$$ uptake for the Calvin cycle

Question 20

Which of the following is a real-world application of fermentation?

Accepted Answer

Production of bread and alcoholic beverages by yeast

Lecture 15

Guida di studio - Domande di pratica