Q: Which of the following best describes the overall chemical equation for cellular respiration?

$$C_6H_{12}O_6$ + 6 \mathrm{O}_2 \rightarrow 6 \mathrm{CO}_2 + 6 \mathrm{H}_2\mathrm{O} + \text{energy}$$

Question 1

Which of the following best describes the overall chemical equation for cellular respiration?

Accepted Answer

$$C_6H_{12}O_6$ + 6 \mathrm{O}_2 ightarrow 6 \mathrm{CO}_2 + 6 \mathrm{H}_2\mathrm{O} + 	ext{energy}$$

Question 2

During which stage of cellular respiration is the majority of ATP produced, and what is the main mechanism for its production?

Accepted Answer

Oxidative phosphorylation; chemiosmosis via ATP synthase

Question 3

Which molecule acts as the final electron acceptor in the electron transport chain of aerobic respiration?

Accepted Answer

O$$_2$$

Question 4

If a plant is exposed only to green light, what would be the expected effect on the rate of photosynthesis and why?

Accepted Answer

Photosynthesis would decrease because green light is mostly reflected, not absorbed, by chlorophyll.

Question 5

Which of the following best explains the relationship between photosynthesis and cellular respiration in the global carbon cycle?

Accepted Answer

Photosynthesis fixes CO$$_2$$ into organic molecules, while cellular respiration releases CO$$_2 by $$breaking down those molecules.

Question 6

Which of the following is a correct description of substrate-level phosphorylation?

Accepted Answer

ATP is produced directly by the transfer of a phosphate group from a substrate to ADP.

Question 7

A mutation disables the enzyme RuBisCO in a plant. Which process would be directly affected and what would be the consequence?

Accepted Answer

The Calvin cycle; the plant would be unable to fix CO$$_2$$ into organic molecules.

Question 8

Which of the following best describes the fate of oxygen atoms from water during photosynthesis?

Accepted Answer

They are released as O$$_2$$ gas.

Question 9

Which of the following statements about the citric acid (Krebs) cycle is correct?

Accepted Answer

It occurs twice per glucose molecule and produces NADH, FADH$$_2$$, and CO$$_2.$$

Question 10

Which of the following best explains why C$$_4$$ and CAM plants are more efficient than C$$_3$$ plants in hot, dry environments?

Accepted Answer

They have mechanisms to minimize photorespiration by partitioning CO$$_2$$ fixation in space (C$$_4) or $$time (CAM).

Question 11

A patient is exposed to cyanide, which inhibits cytochrome c oxidase in the electron transport chain. What is the immediate effect on cellular respiration?

Accepted Answer

O$$_2$$ consumption stops and ATP production by oxidative phosphorylation ceases.

Question 12

Which of the following is a direct product of the light reactions of photosynthesis and is used in the Calvin cycle?

Accepted Answer

NADPH

Question 13

Which of the following best describes the greenhouse effect?

Accepted Answer

The trapping of heat in Earth's atmosphere by greenhouse gases such as CO$$_2$$ and methane.

Question 14

Which of the following is a likely consequence of large-scale deforestation on atmospheric CO$$_2$$ levels and climate?

Accepted Answer

Increased CO$$_2$$ levels and enhanced greenhouse effect.

Question 15

Which of the following best describes chemiosmosis in mitochondria?

Accepted Answer

The movement of protons down their concentration gradient through ATP synthase to produce ATP.

Question 16

Which of the following is true about the Calvin cycle?

Accepted Answer

It uses ATP and NADPH to convert CO$$_2$$ into G3P.

Question 17

Which of the following is oxidized and which is reduced during photosynthesis?

Accepted Answer

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

Question 18

Which of the following best explains why leaves change color in the fall?

Accepted Answer

Chlorophyll breaks down, revealing carotenoids and other pigments.

Question 19

Which of the following is a correct sequence of events in aerobic cellular respiration?

Accepted Answer

Glycolysis $$\rightarrow$$ Pyruvate oxidation $$\rightarrow$$ Citric acid cycle $$\rightarrow$$ Oxidative phosphorylation

Question 20

Which of the following is a direct effect of increased atmospheric CO$$_2 on $$plant growth?

Accepted Answer

Some plants may grow faster, but nutrient limitations and climate changes can offset this effect.

Study Guide: Cellular Respiration, Photosynthesis, and Related Processes

Guida di studio - Domande di pratica

Study guide - Flashcard