Multiple Choice
Which of the following functional groups is always present in all carbohydrates?
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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 are examples of carbohydrates?
A
Adenine and guanine
B
Glucose and cellulose
C
Hemoglobin and insulin
D
Cholesterol and triglycerides
Verified step by step guidance1
Step 1: Understand the definition of carbohydrates. Carbohydrates are organic molecules composed of carbon, hydrogen, and oxygen, typically in a ratio of 1:2:1. They serve as energy sources and structural components in living organisms.
Step 2: Identify the examples provided in the question. The options include adenine and guanine, glucose and cellulose, hemoglobin and insulin, and cholesterol and triglycerides.
Step 3: Analyze each option. Adenine and guanine are nitrogenous bases found in nucleic acids, not carbohydrates. Hemoglobin and insulin are proteins, and cholesterol and triglycerides are lipids. Glucose and cellulose, however, are carbohydrates. Glucose is a monosaccharide (simple sugar), and cellulose is a polysaccharide (complex carbohydrate).
Step 4: Recall the structural and functional roles of glucose and cellulose. Glucose is a primary energy source for cells, while cellulose is a structural component in plant cell walls.
Step 5: Conclude that glucose and cellulose are the correct examples of carbohydrates based on their chemical composition and biological roles.
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