Q: Which of the following equations correctly represents the overall process of cellular respiration?

$$C_6H_{12}O_6$ + 6O_2 \rightarrow 6CO_2 + 6H_2O + \text{energy (ATP)}$$

Question 1

Which of the following best describes the main purpose of glycolysis in cellular respiration?

Accepted Answer

To convert glucose into pyruvate, generating ATP and NADH in the process

Question 2

During which process is the majority of ATP produced in aerobic respiration, and where does this process occur?

Accepted Answer

Oxidative phosphorylation; inner mitochondrial membrane

Question 3

Which of the following equations correctly represents the overall process of cellular respiration?

Accepted Answer

$$C_6H_{12}O_6$ + 6O_2 ightarrow 6CO_2 + 6H_2O + 	ext{energy (ATP)}$$

Question 4

Which of the following best explains why fermentation is necessary in anaerobic conditions?

Accepted Answer

It regenerates NAD$$^+$$, allowing glycolysis to continue producing ATP

Question 5

Which of the following is a product of the noncyclic electron flow in photosynthesis?

Accepted Answer

NADPH

Question 6

A plant is exposed to light of a wavelength that is not absorbed by chlorophyll. What is the most likely outcome?

Accepted Answer

The rate of photosynthesis will decrease because the energy cannot be absorbed

Question 7

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

Accepted Answer

The products of photosynthesis are the reactants of cellular respiration, and vice versa

Question 8

Which of the following is the correct order of electron flow during the light-dependent reactions of photosynthesis?

Accepted Answer

Photosystem II $$\rightarrow$$ electron transport chain $$\rightarrow$$ Photosystem I $$\rightarrow$$ NADP$$^+$$

Question 9

Why is the cyclic electron flow necessary in photosynthesis?

Accepted Answer

It produces additional ATP without generating NADPH, balancing the ATP/NADPH ratio needed for the Calvin cycle

Question 10

Which of the following best describes the role of pigments in photosynthesis?

Accepted Answer

They absorb specific wavelengths of light, initiating the light-dependent reactions

Question 11

Which of the following is a correct statement about the Calvin cycle?

Accepted Answer

It uses ATP and NADPH to convert CO$$_2$$ into glucose

Question 12

Which of the following best explains why the oxidation-reduction reactions are important in both cellular respiration and photosynthesis?

Accepted Answer

They transfer energy by moving electrons from one molecule to another

Question 13

A patient’s muscle cells are deprived of oxygen during intense exercise. Which process allows the cells to continue producing ATP, and what is a byproduct?

Accepted Answer

Lactic acid fermentation; lactic acid

Question 14

Which of the following is the correct formula for the light-dependent reactions of photosynthesis?

Accepted Answer

$$2H_2O + 2NADP^+ + 3ADP + 3P_i + 	ext{light} ightarrow O_2$ + 2NADPH + 3ATP$$

Question 15

Which of the following best explains why autotrophic bacteria are important in ecosystems?

Accepted Answer

They produce organic molecules from inorganic sources, supporting food webs

Question 16

Which of the following best describes the difference between C3, C4, and CAM plants?

Accepted Answer

They use different mechanisms to fix CO$$_2$$ and minimize photorespiration under varying environmental conditions

Question 17

Which of the following is the main function of the electron transport chain in cellular respiration?

Accepted Answer

To create a proton gradient that drives ATP synthesis

Question 18

Which of the following best explains the role of NAD$$^+ in $$cellular respiration?

Accepted Answer

It acts as an electron carrier, accepting electrons during glycolysis and the Krebs cycle

Question 19

A scientist measures the rate of photosynthesis in a plant under different concentrations of CO$$_2. $$Which of the following best explains why the rate increases with CO$$_2$$ concentration up to a point, then levels off?

Accepted Answer

Other factors, such as light intensity or enzyme availability, become limiting

Question 20

Which of the following best describes the absorption spectrum of chlorophyll?

Accepted Answer

It absorbs light most strongly in the blue and red regions, but reflects green light

Cellular Respiration and Photosynthesis: Study Guide Notes

Study Guide - Practice Questions

Study Guide - Flashcards