Question 1

Which organelle is depicted in the image and is primarily responsible for aerobic metabolism in eukaryotic cells?

Accepted Answer

Mitochondrion

Question 2

Which process occurs within the organelle shown and results in the production of the majority of cellular ATP?

Accepted Answer

Electron transport system (ETS) and oxidative phosphorylation

Question 3

During aerobic metabolism, which molecule acts as the final electron acceptor in the electron transport system within the mitochondria?

Accepted Answer

Oxygen ($$O_2)$$

Question 4

Which of the following best describes the role of ATP synthase in the mitochondria?

Accepted Answer

It synthesizes ATP from ADP and inorganic phosphate using a proton gradient.

Question 5

Which metabolic pathway directly produces pyruvate from glucose in the cytoplasm before mitochondrial entry?

Accepted Answer

Glycolysis

Question 6

A patient with a genetic defect in cytochromes would most likely have impaired function in which mitochondrial process?

Accepted Answer

Electron transport system (ETS)

Question 7

Which coenzyme is reduced to $$NADH + H^+$$ during the citric acid cycle in the mitochondria?

Accepted Answer

NAD+

Question 8

What is the primary function of the citric acid cycle (Krebs cycle) in cellular metabolism?

Accepted Answer

To generate high-energy electron carriers for the electron transport system

Question 9

Which process describes the breakdown of triglycerides into glycerol and fatty acids for energy production?

Accepted Answer

Lipolysis

Question 10

A person with a deficiency in pancreatic alpha-amylase would have difficulty digesting which type of nutrient?

Accepted Answer

Carbohydrates

Question 11

Which metabolic state is characterized by the absorption and storage of nutrients following a meal?

Accepted Answer

Absorptive state

Question 12

Which vitamin deficiency is most likely to result from a lack of intrinsic factor?

Accepted Answer

Vitamin B12

Question 13

Which process is responsible for the synthesis of glucose from non-carbohydrate precursors such as amino acids?

Accepted Answer

Gluconeogenesis

Question 14

A patient with metabolic obesity is most likely to have which underlying issue?

Accepted Answer

A genetic or hormonal disorder affecting metabolism

Question 15

Which of the following best describes chemiosmosis in the mitochondria?

Accepted Answer

The movement of protons ($$H^+) $$across the inner mitochondrial membrane to drive ATP synthesis

Question 16

Which hormone is primarily responsible for stimulating hunger by acting on the hypothalamic feeding center?

Accepted Answer

Ghrelin

Question 17

Which metabolic disorder is characterized by the accumulation of phenylalanine due to a deficiency in the enzyme phenylalanine hydroxylase?

Accepted Answer

Phenylketonuria (PKU)

Question 18

Which process describes the removal of an amino group from an amino acid, resulting in the production of ammonia?

Accepted Answer

Deamination

Question 19

Which of the following is a consequence of excessive ketone body production during uncontrolled diabetes mellitus?

Accepted Answer

Ketoacidosis

Question 20

Which of the following best describes basal metabolic rate (BMR)?

Accepted Answer

The minimum energy required to maintain vital functions in a resting, awake state

Metabolism and Energetics: Key Terms and Concepts

Study Guide - Practice Questions