Multiple Choice
Do sugar molecules provide all the elements required to synthesize the four major types of biological macromolecules (carbohydrates, lipids, proteins, and nucleic acids)?
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1. Introduction to Biochemistry
Carbohydrates
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which of the following monosaccharides is the primary energy source for most cells in the human body?
A
Ribose
B
Fructose
C
Galactose
D
Glucose
Verified step by step guidance1
Understand the role of monosaccharides in cellular energy production. Monosaccharides are simple sugars that serve as fundamental energy sources for cells. Glucose is the most important monosaccharide for energy generation in humans.
Recall that glucose is metabolized through glycolysis, a central biochemical pathway that converts glucose into pyruvate, producing ATP (adenosine triphosphate), the primary energy currency of the cell.
Compare the listed monosaccharides: Ribose is primarily used in nucleotide synthesis (e.g., RNA and DNA), Fructose is metabolized in the liver but is not the primary energy source for most cells, and Galactose is converted into glucose before being used for energy.
Recognize that glucose is the preferred energy source for most cells because it is readily available in the bloodstream and efficiently metabolized to produce ATP.
Conclude that glucose is the correct answer based on its central role in energy metabolism and its widespread use by cells in the human body.
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