Question 1

Which of the following best describes the role of glycolysis in cellular respiration?

Accepted Answer

It converts glucose into two molecules of pyruvate, producing ATP and NADH.

Question 2

During aerobic respiration, what are the three main steps, in order, and a primary product of each?

Accepted Answer

Glycolysis (pyruvate), Kreb's cycle (NADH), Electron Transport Chain (ATP)

Question 3

Which of the following best explains the function of ATP synthase in the mitochondria?

Accepted Answer

It uses the proton gradient to synthesize ATP from ADP and inorganic phosphate: $$ 	ext{ADP} + 	ext{P}_i ightarrow 	ext{ATP} $$

Question 4

A patient consumes a meal high in fiber. How does this affect the glycemic response and why?

Accepted Answer

The glycemic response is decreased because fiber slows glucose absorption.

Question 5

Which hormone is secreted in response to high blood glucose, and what is its primary effect in the liver?

Accepted Answer

Insulin; it stimulates glycogen synthesis from glucose.

Question 6

What is the main function of the electron transport chain in aerobic respiration?

Accepted Answer

To transfer electrons from NADH and FADH2 to oxygen, creating a proton gradient.

Question 7

Which of the following best defines homeostasis?

Accepted Answer

The maintenance of a stable internal environment despite external changes.

Question 8

A person with type 1 diabetes mellitus is most likely to experience which of the following?

Accepted Answer

Inability to produce insulin due to autoimmune destruction of pancreatic beta cells.

Question 9

Which of the following statements about the metabolism of fructose compared to glucose is correct?

Accepted Answer

Fructose is primarily metabolized in the liver and bypasses the rate-limiting step of glycolysis.

Question 10

Which of the following best describes the role of oxygen in aerobic respiration?

Accepted Answer

Oxygen acts as the final electron acceptor in the electron transport chain.

Question 11

A patient with hypoglycemia is likely to have which of the following symptoms?

Accepted Answer

Shakiness, confusion, and sweating due to low blood glucose.

Question 12

Which of the following equations correctly represents the overall process of aerobic respiration?

Accepted Answer

$$ 	ext{C}_6	ext{H}_{12}	ext{O}_6 + 6	ext{O}_2 ightarrow 6	ext{CO}_2 + 6	ext{H}_2	ext{O} + 	ext{ATP} $$

Question 13

Which of the following best describes the effect of glucagon in the liver?

Accepted Answer

It stimulates glycogen breakdown to increase blood glucose.

Question 14

A person eats a meal with a high glycemic index. What is the most likely immediate effect on their blood glucose and insulin levels?

Accepted Answer

Rapid increase in blood glucose followed by a spike in insulin secretion.

Question 15

Which of the following is a correct description of the Kreb's cycle?

Accepted Answer

A series of reactions in the mitochondria that oxidize acetyl-CoA to produce NADH, FADH2, and CO2.

Question 16

Which of the following best explains why glucose homeostasis is important for the human body?

Accepted Answer

It ensures a constant supply of energy to the brain and other vital organs.

Question 17

Which of the following is a key difference between type 1 and type 2 diabetes mellitus?

Accepted Answer

Type 1 is characterized by lack of insulin production; type 2 by insulin resistance.

Question 18

Which of the following best describes the glycemic index?

Accepted Answer

A measure of how quickly a food raises blood glucose compared to pure glucose.

Question 19

Which of the following is a product of glycolysis?

Accepted Answer

Pyruvate

Question 20

Which of the following best describes the effect of insulin in adipose (fat) tissue?

Accepted Answer

It promotes the uptake of glucose and the synthesis of fat.

Study Guide: Carbohydrates in the Body – Cellular Energy, Glycemic Index, and Glucose Homeostasis

Guida di studio - Domande di pratica