#53 Practice Intro to Cell Respiration and Glycolysis

Glycolysis results in the net gain of:

• 2 ATP

• 4 ATP

• 4 NADH

• 2 Acetyl CoA

Answer explanation

Glycolysis is the process of breaking down glucose into two molecules of pyruvate, producing a net gain of 2 ATP. This means that while 4 ATP molecules are generated, 2 ATP are used in the process, resulting in a net gain of 2 ATP, not 4 ATP, 4 NADH or 2 Acetyl CoA.

How many total ATP is produced during glycolysis?

• 2 ATP

• 4 ATP

• 4 NADH

• 2 Acetyl CoA

Answer explanation

Glycolysis is the process of breaking down glucose into two molecules of pyruvate, producing a net gain of 2 ATP. This means that while 4 ATP molecules are generated, 2 ATP are used in the process, resulting in a net gain of 2 ATP, not 4 ATP, 4 NADH or 2 Acetyl CoA.

Where does glycolysis take place in cells?

• Cytoplasm

• Mitochondrion

• Endoplasmic Reticulum

• Ribosomes

Answer explanation

Glycolysis is a process that occurs in the cytoplasm of cells. It is the metabolic pathway that converts glucose into pyruvate. The other options listed, namely the mitochondrion, endoplasmic reticulum, and ribosomes, are involved in different cellular processes but not specifically in glycolysis.

Tags

NGSS.HS-LS2-3

NGSS.HS-LS2-5

Which is not part of the net products of Glycolysis?

• 2 ATP

• 2 NADH

• 2 Pyruvates

• 2 CO₂

Answer explanation

Glycolysis is a metabolic pathway that breaks down glucose into pyruvate. The net products are 2 ATP, 2 NADH, and 2 Pyruvic Acids. CO2 is not a product of Glycolysis, it is produced during the Krebs cycle. Therefore, '2 CO2' is not part of the net products of Glycolysis.

Which of the following is not a requirement for glycolysis?

• Oxygen

• ATP

• NAD⁺

• Glucose

Answer explanation

Glycolysis is a metabolic pathway that does not require oxygen. It is an anaerobic process that occurs in the cytoplasm of the cell, breaking down glucose to produce ATP and NAD+. Oxygen, therefore, is not a requirement for glycolysis.

Tags

NGSS.HS-LS1-7

The first step in getting energy in the cell by breaking down glucose is known as

• Krebs cycle

• ETC

• Lactic Acid Fermentation

• Glycolysis

Answer explanation

Glycolysis is the correct answer. It is the first step in the breakdown of glucose to extract energy in the cells. It is a series of biochemical reactions that convert glucose into pyruvate and produce ATP. Other options like the Krebs cycle and Electron Transport Chain (ETC) are subsequent steps, while Lactic Acid Fermentation is a type of anaerobic respiration that also breaks down glucose, but it is not the first step.

Tags

NGSS.HS-LS1-7

What is the starting molecule for glycolysis?

• Glucose

• ADP

• Oxygen

• Pyruvic Acid

Answer explanation

Glycolysis is the metabolic pathway that converts glucose into pyruvate. The free energy released in this process is used to form the high-energy molecules ATP and NADH. Therefore, the starting molecule for glycolysis is glucose, not ADP, oxygen, or pyruvic acid.

Tags

NGSS.HS-LS1-7

Glycolysis requires this reactant

• ATP

• Oxygen

• sunlight

• NADP+

Answer explanation

Glycolysis is the metabolic pathway that converts glucose into pyruvate. The process does not require Oxygen or sunlight, nor does it need NADP+. However, it does require ATP. ATP provides the initial input of energy that allows the process to start, thus ATP is required for Glycolysis.

What is Anaerobic Respiration?

• process of producing energy without oxygen.

• process of producing energy with oxygen.

Answer explanation

Anaerobic respiration refers to the process of producing energy without the presence of oxygen. This is the correct explanation for the given question because the answer clearly states 'process of producing energy without oxygen', which directly corresponds to the definition of Anaerobic Respiration.

Tags

NGSS.HS-LS2-3

Where does pyruvate processing take place?

• Cytoplasm

• Intermembrane space

• Matrix

• Inner membrane

Tags

NGSS.HS-LS1-7