Ch 3 Biological Molecules Quiz

What are the basic units of carbohydrates?

• glycerol

• amino acids

• glucose

• fatty acids

Which carbohydrate is stored in animals?

• cellulose

• starch

• glycogen

• glucose

What is a characteristic of complex carbohydrates?

• Soluble in water

• Made up of many glucose molecules

• Pass through cell membranes easily

• Made up of two sugars

What is a function of carbohydrates?

• Provide energy for the body.
• Help in the absorption of fats.
• Act as a primary source of protein.
• Store vitamins and minerals.

Mason is conducting an experiment to find out which carbohydrates can pass through a partially permeable membrane. He has four different carbohydrates to test. Which of the following carbohydrates can pass through the membrane?

• Sucrose

• Maltose

• Starch

• Glycogen

During a winter camping trip, Abigail noticed that animals like seals and penguins have a thick layer of fat beneath their skin. How does this adaptation help them?

• By increasing blood flow

• By forming a thick layer of fat beneath the skin

• By absorbing sunlight

• By producing sweat

What role do fats play in reducing water loss from the skin?

• By absorbing water

• By secreting an oily substance

• By increasing skin temperature

• By blocking pores

What is the basic unit composition of fats?

• 2 glycerol and 2 fatty acid molecules

• 1 glycerol and 3 fatty acid molecules

• 3 glycerol and 1 fatty acid molecule

• 4 glycerol and 4 fatty acid molecules

During a biology class, Olivia was examining a diagram of a nutrient molecule.

Identify the nutrient.

• glucose

• fat

• protein

• starch

What are proteins synthesized from?

• fatty acids

• glucose

• amino acids

• glycerol