Which of the following statements best describes a characteristic of NAD⁺?

NAD⁺ is reduced to NADH in glycolysis, pyruvate oxidation, and the citric acid cycle

NAD⁺ stores more chemical energy than NADH

NAD⁺ may donate electrons for use in oxidative phosphorylation

NAD⁺ is oxidized in glycolysis to produce ATP

Glycolysis results in the net production of which of the following sets of molecules per glucose molecule?

2 NAD⁺, 2 pyruvate, and 2 ATP

Which of the following types of metabolic poison would most directly interfere with glycolysis?

an agent that closely mimics the structure of glucose but can’t be metabolized

an agent that reacts with oxygen and depletes (reduces) its concentration in the cell

an agent that binds to pyruvate and inactivates it

an agent that reacts with NADH and oxidizes it to NAD⁺

The energy released in the mitochondrial electron transport chain is used to transport protons into ______________, which produces molecules of ATP.

enzyme complex of the Krebs cycle

Select the correct sequence concerning glucose catabolism.

Glycolysis ➔ Pyruvate ➔ Acetyl CoA ➔ Krebs Cycle ➔ Oxidative Phosphorylation

Glycolysis ➔ Pyruvate ➔ Acetyl CoA ➔ Oxidative Phosphorylation ➔ Krebs Cycle

Glycolysis ➔ Acetyl CoA ➔ Pyruvate ➔ Oxidative Phosphorylation ➔ Krebs Cycle

Glycolysis ➔ Acetyl CoA ➔ Pyruvate ➔ Krebs Cycle ➔ Oxidative Phosphorylation

Which of the following statements accurately reflects the process of glycolysis?

Glycolysis is most likely one of the earliest of all biochemical reactions to evolve. Glycolysis uses no molecular oxygen.

Glycolysis is most likely one of the earliest of all biochemical reactions to evolve. Glycolysis uses molecular oxygen.

Glycolysis is most likely one of the earliest of all biochemical reactions to evolve. Glycolysis uses molecular oxygen, however, it occurs in aerobic environments.

Glycolysis is most likely one of the earliest of all biochemical reactions to evolve. Glycolysis uses molecular oxygen and occurs inside the mitochondria.

Which of the following reactions produces the majority of the CO₂ released by the complete oxidation of glucose?

oxidation of pyruvate to acetyl-CoA

Which of the following statements best describes the primary role played by oxygen in cellular respiration?

It serves as the final acceptor for electrons from the electron transport chain.

It yields energy in the form of ATP as it is passed down the electron transport chain.

It oxidizes glucose to form two molecules of pyruvate.

It serves as an acceptor for carbon, forming CO₂ in the citric acid cycle.

Energy released from the electron transport chain is used to pump H⁺ ions into which location in eukaryotic cells?

mitochondrial intermembrane space

cytoplasm adjacent to the mitochondrial outer membrane

When a cell is deprived of oxygen, which of the following processes will be inhibited first?

the oxidation of pyruvate to acetyl CoA

The oxygen consumed during cellular respiration is involved directly in which process or event?

accepting electrons at the end of the electron transport chain

the oxidation of pyruvate to acetyl CoA

The primary role of oxygen in cellular respiration is to _________.

acts as an acceptor for electrons and hydrogen, forming water (H 2 O)

yield energy in the form of ATP as it is passed down the respiratory chain

combine with carbon, forming CO 2

combine with lactate forming pyruvate

Which of the following events takes place in the electron transport chain?

the extraction of energy from high-energy electron remaining from glycolysis and the citric acid (Krebs) cycle

the breakdown of glucose into two pyruvate molecules

the breakdown of an acetyl group into carbon dioxide

substrate-level phosphorylation

In chemiosmosis (a stage of oxidative phosphorylation) what is the most direct source of energy that is used to convert ADP + Pi to ATP? l

energy released from movement of H+ through ATP synthase, down their electrochemical gradient

energy released as electrons flow through the electron transport system

energy released from substate-level phosphorylation

no external source of energy is required because the reaction is exergonic

A cell has enough available ATP to meet its needs for about 30 seconds. What is likely to happen when an athlete exhausts their ATP supply?

Catabolic processes are activated that generate more ATP

ATP is transported into the cell from the circulatory system

Other cells take over, and the muscle cells that have used up their ATP ceases to function

Unit 4b Cellular Respiration (Bio 2)

Authored by Sarah Hendricks

Science

11th Grade

NGSS covered

Used 15+ times

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

Cellular respiration runs the biochemical pathways of photosynthesis in reverse.

Photosynthesis stores energy in complex organic molecules; cellular respiration releases energy from complex organic molecules.

Photosynthesis occurs only in plants; cellular respiration occurs only in animals.

Photosynthesis is catabolic; cellular respiration is anabolic.

Tags

NGSS.HS-LS2-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The first stage of cellular respiration, and the oldest in terms of evolution is:

Krebs Cycle

Deamination

Fermentation

Chemiosmosis

Glycolysis

Tags

NGSS.HS-LS1-7

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In eukaryotes, glycolysis takes place in the:

mitochondria of the cell

cytoplasm of the cell

ribosomes of the cell

endoplasmic reticulum of the cell

Golgi bodies of the cell

Tags

NGSS.HS-LS2-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the product of glycolysis?

pyruvate

citrate

lactate

ethanol

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Acetyl CoA is produced from what molecule?

citrate

ATP synthase

carbon dioxide

pyruvate

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Generation of ATP in the last step of cellular respiration (chemiosmosis) is driven by:

Pi transfer through the plasma membrane

a difference in H+ concentration on the two sides of the mitochondrial membrane

osmosis of macromolecules

large quantities of ADP

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The reaction, C₆H₁₂O₆ + 6 O₂ = 6 CO₂ + 6H₂O, when it occurs in living cells is known as

cellular respiration

anaerobic fermentation

photosynthesis

glycolysis

oxidative phosphorylation

Tags

NGSS.HS-LS1-7

NGSS.HS-LS2-5

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Unit 4b Cellular Respiration (Bio 2)

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

The first stage of cellular respiration, and the oldest in terms of evolution is:

In eukaryotes, glycolysis takes place in the:

What is the product of glycolysis?

Acetyl CoA is produced from what molecule?

Generation of ATP in the last step of cellular respiration (chemiosmosis) is driven by:

The reaction, C₆H₁₂O₆ + 6 O₂ = 6 CO₂ + 6H₂O, when it occurs in living cells is known as

In cellular respiration, energy is harvested from glucose in a sequence of four main pathways. Which of the following is NOT one of these four pathways?

Which of the following statements best describes a characteristic of NAD⁺?

A single glucose molecule can drive the Krebs cycle:

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