Glycolysis Pathway Quiz

2.

Glycolysis, the process of creating new ATP, requires what?

A six-carbon sugar
Two three-carbon sugars
NADH
Oxygen

Correct Answer

A. A six-carbon sugar

Explanation

Glycolysis is anaerobic and does not require oxygen. Glucose, a six-carbon sugar, is split into smaller molecules and is essential for glycolysis.

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3.

What is the overall end product of the process of glycolysis?

Two extra ATP
Oxygen
Two extra PGAL molecules
Extra ADP

Correct Answer

A. Two extra ATP

Explanation

At the end of the glycolysis process, two additional ATP molecules are created along with two pyruvates. The ADP and PGAL are used in the process but are not end products.

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4.

From where is the energy required for glycolysis derived?

From the ATP molecules
From the breaking apart of glucose
From making carbon-carbon bonds.
From the process of converting ATP to ADP

Correct Answer

A. From the breaking apart of glucose

Explanation

The energy required for glycolysis is primarily derived from the breaking apart of glucose molecules. Glycolysis is a metabolic pathway that involves the breakdown of glucose into smaller molecules, ultimately producing energy in the form of ATP (adenosine triphosphate) and NADH (nicotinamide adenine dinucleotide). During the early steps of glycolysis, ATP molecules are consumed to initiate the process, but the net production of ATP occurs later in the pathway through substrate-level phosphorylation. This process involves transferring phosphate groups from intermediates in glycolysis to ADP (adenosine diphosphate), forming ATP.

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5.

What percentage of the total chemical energy in glucose is released in glycolysis?

50%
1.10%
5%
5.26%.

Correct Answer

A. 5.26%.

Explanation

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Glycolysis, the first step in the breakdown of glucose to extract energy for cellular metabolism, produces a net gain of two ATP molecules per molecule of glucose. However, the complete oxidation of one glucose molecule during cellular respiration (including glycolysis, the Krebs cycle, and oxidative phosphorylation) produces a theoretical maximum yield of 36 to 38 ATP molecules. Therefore, the percentage of total chemical energy in glucose that is released during glycolysis can be estimated as (2 ATP / 38 ATP) * 100% = approximately 5.26%. This means that a relatively small fraction of the total chemical energy in glucose is released during glycolysis, with the majority being released during the later stages of cellular respiration.

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6.

How many ATP molecules are produced in the EMP pathway?

24 ATP molecules
16 molecules
32 molecules
2 molecules

Correct Answer

A. 2 molecules

Explanation

The EMP pathway/glycolysis only produces a net of 2 ATPs. The produced NADH molecules are only used to generate ATP by substrate-level phosphorylation in the tricarboxylic acid cycle, which is a different cycle. The correct answer to this question is "2 ATP molecules."

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7.

EMP pathway is also called?

Kreb cycle
Dark reaction
Stroma Reaction
Glycolysis

Correct Answer

A. Glycolysis

Explanation

The EMP pathway is also known as glycolysis. Glycolysis is the metabolic pathway that converts glucose into pyruvate, generating ATP and NADH in the process. It is the first step in cellular respiration and occurs in the cytoplasm of cells. The other options mentioned, Kreb cycle, Dark reaction, and Stroma Reaction, are not synonymous with the EMP pathway and refer to different metabolic processes.

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8.

Which is the common pathway for both aerobic and anaerobic pathways?

Glycolysis
Tricarboxylic Acid Cycle
Citric Acid Cycle
Kreb cycle

Correct Answer

A. Glycolysis

Explanation

Glycolysis is the common pathway for both aerobic and anaerobic pathways. It is the initial step in cellular respiration where glucose is broken down into pyruvate. This process occurs in the cytoplasm and does not require oxygen. In aerobic respiration, the pyruvate produced in glycolysis is further broken down in the Tricarboxylic Acid Cycle (also known as the Citric Acid Cycle or Kreb cycle) to produce more energy. In anaerobic respiration, the pyruvate is converted into other byproducts without the need for oxygen. Therefore, glycolysis is the correct answer as it is involved in both aerobic and anaerobic pathways.

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9.

What is the end product of Glycolysis?

Pyruvate
Thiamine
Kinase
Carboxyl

Correct Answer

A. Pyruvate

Explanation

Glycolysis is the process by which glucose is broken down into pyruvate molecules. Therefore, the end product of glycolysis is pyruvate. ATP and kinase are not the end products of glycolysis, but rather ATP is produced as a result of glycolysis and kinase is an enzyme involved in the phosphorylation of molecules. Carboxyl is not directly related to glycolysis.

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10.

The high concentration of glucose 6-phosphate inhibits

Hexokinase
Kinase
Pentokinase
Glucokinase

Correct Answer

A. Hexokinase

Explanation

Hexokinase is the correct answer because high concentration of glucose 6-phosphate inhibits its activity. Hexokinase is an enzyme that catalyzes the phosphorylation of glucose to glucose 6-phosphate, and this product acts as a feedback inhibitor of hexokinase. When the concentration of glucose 6-phosphate is high, it signals that there is already enough glucose 6-phosphate in the cell and the production of more is not needed, thus inhibiting the activity of hexokinase.

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Glycolysis Pathway Quiz

Where does glycolysis take place?

Quiz Preview

Glycolysis, the process of creating new ATP, requires what?

What is the overall end product of the process of glycolysis?

From where is the energy required for glycolysis derived?

What percentage of the total chemical energy in glucose is released in glycolysis?

How many ATP molecules are produced in the EMP pathway?

EMP pathway is also called?

Which is the common pathway for both aerobic and anaerobic pathways?

What is the end product of Glycolysis?

The high concentration of glucose 6-phosphate inhibits