Question 1

Which metabolic process is most directly responsible for the decrease in dry weight of seeds placed in the dark with water over one week?

Accepted Answer

Cellular respiration

Question 2

A toxin inhibits oxidative phosphorylation in mitochondria. What immediate effect would this have on ATP and AMP levels in a cell?

Accepted Answer

ATP will decrease and AMP will increase

Question 3

During cellular respiration, which molecule acts as the final electron acceptor in the electron transport chain?

Accepted Answer

Oxygen ($$O_2)$$

Question 4

In the experiment with radish seeds, which treatment would result in the greatest increase in dry weight after one week?

Accepted Answer

Light, water

Question 5

Which equation best represents the overall process of photosynthesis?

Accepted Answer

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

Question 6

A person is placed in a sealed chamber and the CO$$_2$$ levels decrease. What is the most likely activity the person is performing?

Accepted Answer

Photosynthesizing

Question 7

Which of the following is the primary source of the dry biomass in plants?

Accepted Answer

Carbon dioxide from the air

Question 8

What energetic change directly provides the energy for ATP synthesis in mitochondria?

Accepted Answer

Flow of protons DOWN the electrochemical gradient through ATP synthase

Question 9

If a cell runs out of oxygen, what will happen to the efficiency of ATP production?

Accepted Answer

It will become less efficient

Question 10

Which process is responsible for the majority of ATP production during aerobic respiration?

Accepted Answer

Oxidative phosphorylation

Question 11

In the context of cellular metabolism, what is the main function of NADH?

Accepted Answer

Transfers electrons to the electron transport chain

Question 12

Which of the following best explains why plants lose mass when kept in the dark with water?

Accepted Answer

Cellular respiration breaks down stored molecules for energy

Question 13

What is the role of ATP synthase in cellular respiration?

Accepted Answer

Synthesizes ATP using the energy from a proton gradient

Question 14

Which of the following would most likely increase both photosynthetic activity and cellular respiration rate in a plant cell?

Accepted Answer

Increasing light intensity and CO$$_2$$ concentration

Question 15

A batch of seeds is placed in water but kept in the dark. After several days, the dry weight of the seeds decreases. Which process is primarily responsible for this change?

Accepted Answer

Cellular respiration

Question 16

Which molecule is produced as a waste product during aerobic cellular respiration?

Accepted Answer

Carbon dioxide ($$CO_2)$$

Question 17

In the electron transport chain, what is the primary purpose of moving protons into the intermembrane space?

Accepted Answer

To create a proton gradient for ATP synthesis

Question 18

Which of the following best describes the relationship between photosynthesis and cellular respiration in plants?

Accepted Answer

Photosynthesis produces glucose and oxygen, which are used in cellular respiration

Question 19

If the rate of photosynthesis in a sealed chamber increases, what would you expect to happen to the CO$$_2$$ concentration inside the chamber?

Accepted Answer

CO$$_2$$ concentration would decrease

Question 20

Which of the following is a direct result of the movement of electrons through the electron transport chain?

Accepted Answer

Formation of a proton gradient across the inner mitochondrial membrane

Cellular Respiration, Photosynthesis, and Metabolic Processes: Study Notes

Study Guide - Practice Questions

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