During exercise, Beta oxidation is responsible for:

Question

BlackTom AI · Accepted Answer

To approach this question, I will evaluate what beta-oxidation does during exercise and then assess each option.
Option 1: 'The activation of free fatty acids (FFA) to fatty acyl-CoA for transport into the mitochondria' — This step is catalyzed by acyl-CoA synthetase and is part of fatty acid mobilization and transport into mitochondria, not the actual beta-oxidation process. Therefore, this statement describes a preparatory step rather than beta-oxidation itself.
Option 2: 'Conversion of fatty acyl-CoA to lactate, for subsequent gluconeogenesis' — Lactate production arises from glycolysis, not from beta-oxidation. Fatty acyl-CoA is not converted to lactate; this pathway would be inconsistent with fatty acid oxidation and energy production during endurance exercise. This is incorrect for beta-oxidation.
Option 3: 'Conversion of fatty acyl-CoA to glycogen to enter glycolysis' — Glycogen synthesis (glycogenesis) is the storage form of glucose. Fatty acyl-CoA is not converted into glycogen, and glycolysis involves glucose breakdown, not direct fatty acid entry. This option misstates the metabolic fate of fatty acyl-CoA during exercise.
Option 4: 'Conversion of fatty acyl-CoA to Acetyl CoA for the Krebs Cycle' — This precisely describes beta-oxidation: fatty acids are broken down in steps to generate acetyl-CoA, which then feeds the Krebs cycle (citric acid cycle) for ATP production. Each cycle shortens the fatty acyl chain by two carbons, releasing acetyl-CoA, NADH, and FADH2 that fuel the electron transport chain. This aligns with the canonical role of beta-oxidation during exercise when fat oxidation increases for sustained energy.
In summary, the options present various metabolic steps, but only the fourth option correctly matches the beta-oxidation process by producing acetyl-CoA for entry into the Krebs cycle, which is central to fatty acid-derived energy during exercise.

Dashboard End-semester final theory exam

During exercise, Beta oxidation is responsible for:

View Explanation

Log in for full answers

Similar Questions

Bill goes on an 8-hour continuous, moderate-intensity hike. Most of the ATP for this activity will be derived from

What is the metabolic reason for increased fat utilization during endurance exercise?

How do fatty acids help prevent the oxidation of glucose in insulin-sensitive cells?

In a consumer society, many adults channel creativity into buying things

Economic stress and unpredictable times have resulted in a booming industry for self-help products

People born without creativity never can develop it

A product has a selling price of $20, a contribution margin ratio of 40% and fixed cost of $120,000. To make a profit of $30,000. The number of units that must be sold is: Type the number without $ and a comma. Eg: 20000

More Practical Tools for Students Powered by AI Study Helper

Homework AI Solver

Stylized AI Paper Writer

Plagiarism Checker Assistant

Citation AI Academic Writing Tool

In-Class Translation Assistant

AI Note Generator

AI Quiz Answers

Past Exam Questions from University Test Bank

Smart Practice Assistant

Adaptive Practice

Making Your Study Simpler