Carbohydrates, Lipids and Proteins Quiz
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5 questions, one answer each
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1. Which of the following is the correct composition of carbohydrates?
- A. Carbon, hydrogen and oxygen only
- B. Carbon, hydrogen, oxygen and nitrogen
- C. Carbon and hydrogen only
- D. Carbon, hydrogen, oxygen and phosphorus
2. What is glucose used for in cells?
- A. Only for structural support in plants
- B. As a substrate for respiration and as a monomer for starch, glycogen and cellulose
- C. Only as an energy storage molecule
- D. Only to form cell membranes
3. Lipids can be described as having which of the following functions?
- A. Energy storage, insulation and enzyme production
- B. Energy storage, antibody formation and photosynthesis
- C. Energy storage, insulation and forming cell membranes
- D. Insulation, hormone production and breaking down glucose
4. Proteins are polymers made of many monomers. Which monomer unit forms all proteins?
- A. Glucose units
- B. Glycerol and fatty acids
- C. Amino acids
- D. Nucleotides
5. A protein's specific three-dimensional shape is essential because it allows the protein to perform its particular function. Which statement best explains this structure-function relationship for enzymes?
- A. The shape determines how many energy molecules the enzyme can store
- B. The specific shape creates an active site that fits substrate molecules and speeds up reactions
- C. The shape allows the enzyme to dissolve easily in cell membranes
- D. The shape enables the enzyme to form long fibres for structural support