Q: What is the overall equation for cellular respiration?

$$\text{C}_6\text{H}_{12}\text{O}_6 + 6 \text{O}_2 \rightarrow 6 \text{CO}_2 + 6 \text{H}_2\text{O} + \text{ATP}$$

Q: What is the overall chemical equation for photosynthesis?

$$6 \text{CO}_2 + 6 \text{H}_2\text{O} \rightarrow \text{C}_6\text{H}_{12}\text{O}_6 + 6 \text{O}_2$$

Question 1

Which of the following best describes a redox reaction in cellular respiration?

Accepted Answer

A reaction where electrons are transferred from one molecule to another, with oxidation being the loss of electrons and reduction being the gain of electrons.

Question 2

What is the overall equation for cellular respiration?

Accepted Answer

$$	ext{C}_6	ext{H}_{12}	ext{O}_6 + 6 	ext{O}_2 ightarrow 6 	ext{CO}_2 + 6 	ext{H}_2	ext{O} + 	ext{ATP}$$

Question 3

Which molecule acts as an electron carrier during cellular respiration?

Accepted Answer

NADH

Question 4

Where does glycolysis occur in the cell?

Accepted Answer

Cytoplasm

Question 5

Which of the following is a major accomplishment of the citric acid cycle?

Accepted Answer

Generation of NADH and FADH$$_2$$ for the electron transport chain

Question 6

What is substrate-level phosphorylation?

Accepted Answer

The direct transfer of a phosphate group to ADP from a phosphorylated intermediate

Question 7

Which of the following best explains chemiosmosis in mitochondria?

Accepted Answer

The use of a proton gradient across the inner mitochondrial membrane to drive ATP synthesis

Question 8

When does fermentation occur in cells?

Accepted Answer

When oxygen is absent and cells need to regenerate NAD$$^+$$ for glycolysis

Question 9

Which of the following statements about facultative anaerobes is correct?

Accepted Answer

They can switch between aerobic respiration and fermentation depending on oxygen availability.

Question 10

What is the main purpose of fermentation as it relates to glycolysis?

Accepted Answer

To regenerate NAD$$^+ so $$glycolysis can continue

Question 11

Which of the following best defines an autotroph?

Accepted Answer

An organism that produces its own food from inorganic substances

Question 12

What is the overall chemical equation for photosynthesis?

Accepted Answer

$$6 	ext{CO}_2 + 6 	ext{H}_2	ext{O} ightarrow 	ext{C}_6	ext{H}_{12}	ext{O}_6 + 6 	ext{O}_2$$

Question 13

Which part of the chloroplast is the site of the light reactions of photosynthesis?

Accepted Answer

Thylakoid membrane

Question 14

Why do most plants appear green?

Accepted Answer

They reflect green light and absorb other wavelengths.

Question 15

Which of the following is a direct product of the Calvin cycle?

Accepted Answer

G3P (glyceraldehyde-3-phosphate)

Question 16

How do multiple pigment molecules benefit plant cells during photosynthesis?

Accepted Answer

They allow plants to absorb a broader range of light wavelengths.

Question 17

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

Accepted Answer

The light reactions produce ATP and NADPH, which are used in the Calvin cycle to fix carbon.

Question 18

Which of the following is NOT an input for glycolysis?

Accepted Answer

Oxygen

Question 19

Where do the last two stages of cellular respiration occur?

Accepted Answer

Mitochondria

Cellular Respiration and Photosynthesis: Study Guide for BIO121 Unit 3

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