Multiple Choice
Which molecule most directly provides muscle cells with the energy needed to run a race?
20
views
8. Respiration
Introduction to Cellular Respiration
Struggling with General Biology?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which one of the following energy systems can extract energy from both fat and glucose?
A
Glycolysis
B
Fermentation
C
Phosphagen system
D
Aerobic respiration
Verified step by step guidance1
Understand the energy systems listed: Glycolysis, Fermentation, Phosphagen system, and Aerobic respiration. Each system has distinct characteristics and substrates it uses to extract energy.
Recall that fats and glucose are two major energy sources in the body. Fats are broken down into fatty acids, while glucose is metabolized into pyruvate or directly used in energy pathways.
Identify which energy system can utilize both fats and glucose. Glycolysis primarily uses glucose, Fermentation is an anaerobic process that also relies on glucose, and the Phosphagen system uses creatine phosphate for immediate energy, not fats or glucose.
Aerobic respiration is the energy system that can extract energy from both fats and glucose. It occurs in the mitochondria and requires oxygen. Fats are metabolized through β-oxidation, producing acetyl-CoA, which enters the citric acid cycle. Glucose is metabolized into pyruvate, which also enters the citric acid cycle under aerobic conditions.
Conclude that aerobic respiration is the correct answer because it is the only system capable of utilizing both fats and glucose efficiently to produce ATP.
3:39mWatch next
Master Introduction to Cellular Respiration with a bite sized video explanation from Jason
Start learningRelated Videos
Related Practice
Introduction to Cellular Respiration practice set
Problem sets built by lead tutorsExpert video explanations