Answer Key

Question 1 (Worth 2 points)

Alcoholic fermentation

forms fewer ATP molecules than cellular respiration

uses oxygen and ATP molecules as reactants

occurs in the muscle cells of animals and humans

gives off carbon dioxide and NADH as products

Points earned on this question: 0

Question 2 (Worth 2 points)

What substances are used up as the reactants in cellular respiration?

O2 and H2O

O2 and C6H12O6

CO2 and C6H12O6

CO2 and H2O

Points earned on this question: 2

Question 3 (Worth 2 points)

What process must happen before this process depicted below?

Two pyruvate molecules are converted to two lactic acid molecules. Two NADH molecules are converted to two NAD+ molecules in the process.

Fermentation

Cellular respiration

Krebs cycle

Glycolysis

Points earned on this question: 0

Question 4 (Worth 2 points)

In the Krebs cycle,

pyruvate is broken down into CO2 molecules

glucose is broken down into NADH and CO2

CO2 is converted into pyruvate and O2

NADH and CO2 are converted into ATP

Points earned on this question: 2

Question 5 (Worth 2 points)

During the process of cellular respiration, energy stored in glucose molecules is used to form

oxygen molecules

NAD+

ATP

carbohydrates

Points earned on this question: 2

Question 6 (Worth 2 points)

Where does the Krebs cycle occur?

Cytoplasm

Mitochondrion

Cell membrane

Nucleus

Points earned on this question: 2

Question 7 (Worth 2 points)

What stage of cellular respiration produces pyruvate as a product?

Glycolysis

Electron transport chain

Krebs cycle

Fermentation

Points earned on this question: 2

Question 8 (Worth 2 points)

What stage of cellular respiration does not involve any carbon-based compounds as a reactant or product?

Electron transport chain

Krebs cycle

Glycolysis

Fermentation

Points earned on this question: 2

Question 9 (Worth 2 points)

What is produced from the third stage of cellular respiration, the electron transport chain?

NADH and water

Water and ATP

Pyruvate and ATP

Carbon dioxide and NADH

Points earned on this question: 2

Question 10 (Worth 2 points)

What stage of respiration immediately follows the process depicted below?

Two pyruvate molecules undergo a chemical reaction, combining with coenzyme A to form two acetyl-CoA molecules. Two carbon dioxide molecules and two NADH molecules are formed as a result of this process.

Electron transport chain

Glycolysis

Fermentation

Krebs cycle

Points earned on this question: 2

Question

13-09-2016
Chemistry

Answered

Answer Key

Question 1 (Worth 2 points)

Alcoholic fermentation

forms fewer ATP molecules than cellular respiration

uses oxygen and ATP molecules as reactants

occurs in the muscle cells of animals and humans

gives off carbon dioxide and NADH as products

Points earned on this question: 0

Question 2 (Worth 2 points)

What substances are used up as the reactants in cellular respiration?

O2 and H2O

O2 and C6H12O6

CO2 and C6H12O6

CO2 and H2O

Points earned on this question: 2

Question 3 (Worth 2 points)

What process must happen before this process depicted below?

Two pyruvate molecules are converted to two lactic acid molecules. Two NADH molecules are converted to two NAD+ molecules in the process.

Fermentation

Cellular respiration

Krebs cycle

Glycolysis

Points earned on this question: 0

Question 4 (Worth 2 points)

In the Krebs cycle,

pyruvate is broken down into CO2 molecules

glucose is broken down into NADH and CO2

CO2 is converted into pyruvate and O2

NADH and CO2 are converted into ATP

Points earned on this question: 2

Question 5 (Worth 2 points)

During the process of cellular respiration, energy stored in glucose molecules is used to form

oxygen molecules

NAD+

ATP

carbohydrates

Points earned on this question: 2

Question 6 (Worth 2 points)

Where does the Krebs cycle occur?

Cytoplasm

Mitochondrion

Cell membrane

Nucleus

Points earned on this question: 2

Question 7 (Worth 2 points)

What stage of cellular respiration produces pyruvate as a product?

Glycolysis

Electron transport chain

Krebs cycle

Fermentation

Points earned on this question: 2

Question 8 (Worth 2 points)

What stage of cellular respiration does not involve any carbon-based compounds as a reactant or product?

Electron transport chain

Krebs cycle

Glycolysis

Fermentation

Points earned on this question: 2

Question 9 (Worth 2 points)

What is produced from the third stage of cellular respiration, the electron transport chain?

NADH and water

Water and ATP

Pyruvate and ATP

Carbon dioxide and NADH

Points earned on this question: 2

Question 10 (Worth 2 points)

What stage of respiration immediately follows the process depicted below?

Two pyruvate molecules undergo a chemical reaction, combining with coenzyme A to form two acetyl-CoA molecules. Two carbon dioxide molecules and two NADH molecules are formed as a result of this process.

Electron transport chain

Glycolysis

Fermentation

Krebs cycle

Points earned on this question: 2

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taskmasters taskmasters · Answer 1 · 2016-09-15T22:41:42-04:00

Alcoholic fermentation

uses oxygen and ATP molecules as reactants

What substances are used up as the reactants in cellular respiration?

O2 and C6H12O6

What process must happen before this process depicted below?

Two pyruvate molecules are converted to two lactic acid molecules. Two NADH molecules are converted to two NAD+ molecules in the process.

Glycolysis

In the Krebs cycle,

NADH and CO2 are converted into ATP

During the process of cellular respiration, energy stored in glucose molecules is used to form

ATP

Where does the Krebs cycle occur?

Mitochondrion

What stage of cellular respiration produces pyruvate as a product?

Glycolysis

What stage of cellular respiration does not involve any carbon-based compounds as a reactant or product?

Electron transport chain

What is produced from the third stage of cellular respiration, the electron transport chain?

Water and ATP

What stage of respiration immediately follows the process depicted below?

Two pyruvate molecules undergo a chemical reaction, combining with coenzyme A to form two acetyl-CoA molecules. Two carbon dioxide molecules and two NADH molecules are formed as a result of this process.

Krebs cycle

PBCHEM PBCHEM · Answer 2 · 2018-08-14T09:20:16-04:00

Answer 1) uses oxygen and ATP molecules as reactants

Explanation : Alcoholic fermentation
uses oxygen and ATP molecules as reactants. Alcoholic fermentation which is also called as ethanol fermentation is a biological process in which sugars such as glucose, fructose, and sucrose into are converted into cellular energy, producing ethanol and carbon dioxide as by-products.

Answer 2) \(O_{2} and C_{6}H_{12}O_{6}\).

Explanation : Substances that are used up as the reactants in cellular respiration are oxygen and glucose molecules. It occurs in mitochondria. The main product of cellular respiration is ATP.

Answer 3) Glycolysis

Explanation : The process of glycolysis must occur before two pyruvate molecules are converted to two lactic acid molecules. Two NADH molecules are converted to two NAD+ molecules in the process. In glycolysis a molecule gets split into two ATP molecules, two pyruvate molecules, and two NADH molecules.

Answer 4) NADH and \(CO_{2}\) are converted into ATP

Explanation : In kreb's cycle, NADH and \(CO_{2}\) are converted into ATP. It produces of ATP for every molecule of glucose and also produces eight molecules of NADH with two molecules of \(FADH_{2}\) per molecule of glucose.

Answer 5) ATP

Explanation : During the process of cellular respiration, energy stored in glucose molecules is used to form
ATP. ATP means Adenosine Tri Phosphate. In this process a set of metabolic reactions and processes takes place in the cells of organisms to convert biochemical energy from nutrients into ATP, and then release waste products.

Answer 6) Mitochondrion

Explanation : Kreb's cycle occurs in mitochondrion. It exactly occurs in the mitochondrial matrix and generates a pool of chemical energy from the oxidation of pyruvate molecule, giving the end product of glycolysis.

Answer 7) Glycolysis

Explanation : The stage of cellular respiration produces pyruvate as a product is Glycolysis. It involves breaking down of a sugar into more smaller compounds in order to produce energy in the form of ATP. The net end products of glycolysis are two pyruvate, two NADH, and two ATP.

Answer 8) Electron transport chain

Explanation : The stage of cellular respiration does not involve any carbon-based compounds as a reactant or product is Electron transport chain. The electron transport chain in the mitochondrion is the site for oxidative phosphorylation in eukaryotic organism.

Answer 9) Water and ATP

Explanation : The third stage of cellular respiration, the electron transport chain gives water and ATP. The final electron acceptor in the ETC is oxygen atom. When combined together with oxygen, electrons and protons they form molecules of water and ATP.

Answer 10) Kreb's cycle.

Explanation : Kreb's cycle is the process that occurs after two pyruvate molecules undergo a chemical reaction, combining with co-enzyme A to form two acetyl-CoA molecules. Two carbon dioxide molecules and two NADH molecules are formed as a result of this process. Kreb's cycle occurs in mitochondrial matrix after the process of glycolysis.