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

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

Question 1

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

Accepted Answer

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

Question 2

During glycolysis, what is the net gain of ATP molecules per glucose molecule?

Accepted Answer

$$2$$

Question 3

Which phase of glycolysis requires an input of ATP and makes glucose more reactive?

Accepted Answer

Glucose activation phase

Question 4

What is the primary function of the Krebs cycle in cellular respiration?

Accepted Answer

To complete the energy-yielding oxidation of organic molecules

Question 5

Which process directly produces the majority of ATP during cellular respiration?

Accepted Answer

Electron transport chain and oxidative phosphorylation

Question 6

What is the role of NADH and FADH$$_2 in $$cellular respiration?

Accepted Answer

They store electrons and transfer them to the electron transport chain

Question 7

Which of the following statements about chemiosmosis is correct?

Accepted Answer

It couples electron flow down the electron transport chain to ATP production via a proton gradient

Question 8

If oxygen is not present, what process do muscle cells use to continue producing ATP?

Accepted Answer

Lactic acid fermentation

Question 9

How many turns of the Krebs cycle are required to completely oxidize one molecule of glucose?

Accepted Answer

$$2$$

Question 10

Which of the following is a product of alcohol fermentation?

Accepted Answer

Ethanol and CO$$_2$$

Question 11

What is the main purpose of substrate-level phosphorylation in glycolysis and the Krebs cycle?

Accepted Answer

To directly generate ATP from ADP and a phosphate group

Question 12

Which of the following best explains why the inner mitochondrial membrane is highly folded?

Accepted Answer

To increase the surface area available for chemiosmosis and electron transport

Question 13

Which step links glycolysis to the Krebs cycle?

Accepted Answer

Bridge reaction converting pyruvate to acetyl CoA

Question 14

A patient is unable to produce sufficient NAD$$^+ in $$their cells. Which process would be most directly affected?

Accepted Answer

Glycolysis

Question 15

Which of the following is TRUE regarding fermentation?

Accepted Answer

It regenerates NAD$$^+$$ for glycolysis

Question 16

Which metabolic process is responsible for the complete degradation of sugars in the presence of oxygen?

Accepted Answer

Cellular respiration

Question 17

How many ATP molecules are produced from one glucose molecule during aerobic cellular respiration (glycolysis, Krebs cycle, and electron transport combined)?

Accepted Answer

$$36$$

Question 18

Which of the following is a real-life example of a cell using fermentation?

Accepted Answer

Yeast cells producing ethanol in the absence of oxygen

Question 19

Which of the following macromolecules can enter cellular respiration at the Krebs cycle after being broken down?

Accepted Answer

Proteins

Question 20

A defect in ATP synthase would most directly affect which process?

Accepted Answer

Chemiosmosis

Harvesting Energy: Glycolysis and Cellular Respiration

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