Question 1

In which of the following organelles does the common catabolic pathway take place in higher organisms?

Accepted Answer

The common catabolic pathway, also known as the citric acid cycle or Krebs cycle, takes place in the mitochondria of higher organisms. The Golgi bodies and smooth endoplasmic reticulum are involved in processing and transporting molecules, while lysosomes are responsible for breaking down cellular waste and materials.

Question 2

What is the technical name given to the baffles of the mitochondria?

Accepted Answer

The technical name given to the baffles of the mitochondria is "cristae".

Question 3

Enzymes associated with which of the following are localized on the cristae?

Accepted Answer

Enzymes associated with oxidative phosphorylation are localized on the cristae of mitochondria, while enzymes associated with the citric acid cycle are localized in the mitochondrial matrix.

Question 4

Which of the following organelles package and process proteins for secretion and delivery to other cellular compartments?

Accepted Answer

Golgi bodies are responsible for packaging and processing proteins and lipids into vesicles that can be transported to other parts of the cell or secreted outside of the cell.

Question 5

In the molecules AMP, ADP and ATP, "A" stands for which of the following?

Accepted Answer

In the molecules AMP, ADP and ATP, "A" stands for the nucleoside adenosine. This is because the molecules are all derivatives of adenosine, with the addition of one, two or three phosphate groups, respectively.

Question 6

Of the compounds classified as carbohydrates, lipids, and proteins, which can be used by the body as fuels?

Accepted Answer

Carbohydrates, lipids, and proteins can all be used by the body as sources of energy. Carbohydrates are the primary source, lipids provide long-term energy storage, and proteins can be used for energy when necessary.

Question 7

Which of the following is true of anabolism?

Accepted Answer

Anabolism is the process of building up complex molecules from simpler ones, which requires energy input, making it endothermic.

Question 8

Which of the following organelles remove damaged cellular materials and foreign materials from cells?

Accepted Answer

Lysosomes are organelles that contain enzymes capable of breaking down cellular waste and foreign materials. They are also involved in the process of autophagy, which removes damaged cellular components. Golgi bodies are involved in processing and packaging of molecules for secretion or transport within the cell. Mitochondria produce ATP for cellular energy. Smooth endoplasmic reticulum is involved in lipid synthesis and detoxification.

Question 9

Which of the following is true of the catabolic pathways for carbohydrates, lipids and proteins?

Accepted Answer

Each type of compound has its own distinct pathway, as they have unique structures and require different enzymes for breakdown. Carbohydrates are broken down through glycolysis, lipids through beta oxidation, and proteins through proteolysis. While there may be some overlap or interplay between the pathways, they are fundamentally distinct.

Question 10

Which part of metabolism involves the synthesis of molecules?

Accepted Answer

Anabolism involves the synthesis of molecules, while catabolism involves the breakdown of molecules.

Question 11

Which of the following pathways converge to the common catabolic pathway?

Accepted Answer

The common catabolic pathway refers to the final stage of cellular respiration in which energy is extracted from the breakdown of carbohydrates, lipids, and proteins. Therefore, all three pathways for the catabolism of carbohydrates, lipids, and proteins converge in the common catabolic pathway. Choice A and B are incorrect because they only include two out of the three pathways, and choice C is incorrect because it also excludes one of the pathways.

Question 12

How many distinct parts are there in the common metabolic pathway?

Accepted Answer

The answer of How many distinct parts are there in...

Question 13

Metabolism is which of the following?

Accepted Answer

The answer of Metabolism is which of the following?
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Question 14

Where in the cell are the enzymes that catalyze the common metabolic pathway synthesized?

Accepted Answer

Enzymes that catalyze the common metabolic pathway are synthesized in the cytosol.

Question 15

Which of the following scientists proposed the baffle model of the mitochondria?

Accepted Answer

George Palade proposed the baffle model of the mitochondria in 1953, which suggests that the inner membrane of the mitochondria is highly folded and contains numerous invaginations known as cristae.

Question 16

Enzymes associated with which of the following are localized in the mitochondrial matrix?

Accepted Answer

The enzymes of the citric acid cycle (Krebs cycle) are located in the mitochondrial matrix, whereas oxidative phosphorylation occurs across the inner mitochondrial membrane.

Question 17

The citric acid cycle includes which of the following?

Accepted Answer

The citric acid cycle (also known as the Krebs cycle) is a metabolic pathway that occurs in the mitochondria and is involved in the oxidation of acetyl-CoA to generate energy in the form of ATP. It does not include the electron transport chain or the oxidative phosphorylation pathway, which are separate metabolic pathways that occur after the citric acid cycle.

Question 18

Which sugar is found in AMP, ADP and ATP?

Accepted Answer

The sugar found in AMP, ADP, and ATP is ribose. This is the sugar component of RNA and is also found in the nucleotides that make up ATP and related molecules.

Question 19

Mitochondria have how many membranes?

Accepted Answer

Mitochondria have two membranes, an outer membrane and an inner membrane. The outer membrane is smooth and the inner membrane is highly folded to form cristae, which increase the surface area available for energy production.

Question 20

Which of the following scientists established the relationships among the components of the citric acid cycle?

Accepted Answer

H. Krebs established the relationships among the components of the citric acid cycle, also known as the Krebs cycle or tricarboxylic acid cycle.

Quiz 27: Bioenergetics: How the Body Converts Food to Energy