Macromolecules Reading Comprehension

Which of the following best explains why lipids do not mix with water?

• They are made of sugars

• They are non-polar and water-repellent

• They contain nitrogen

• They have a ring structure

What is the relationship between amino acids and proteins?

• Amino acids are used to break down proteins

• Amino acids are monomers that build proteins

• Amino acids store energy like proteins

• Proteins make amino acids in the cell

Why do athletes often eat carbohydrates before a race?

• Carbohydrates provide insulation

• Carbohydrates store genetic information

• Carbohydrates provide immediate energy

• Carbohydrates build muscle

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How can you tell a word might refer to a carbohydrate?

• It ends in -ase

• It ends in -ine

• It ends in -ose or -saccharide

• It ends in -phate

What makes a molecule organic?

• It contains water

• It contains oxygen

• It contains both carbon and hydrogen

• It comes from living animals

How are monomers and polymers related?

• Monomers are made of polymers

• Monomers store genetic material

• Polymers are made by linking many monomers together

• Polymers are simpler than monomers

Which part of the early Earth helped form the first simple molecules?

• Frozen temperatures

• Calm, oxygen-rich air

• Lightning and volcanic heat

• Lack of carbon dioxide

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Why are nucleic acids important for heredity?

• They build cells

• They break down food

• They carry genetic information passed to offspring

• They provide energy for movement

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Which statement describes a function of proteins?

• They store long-term energy

• They provide structure and build muscles

• They form membranes

• They provide immediate energy

What condition of early Earth helped lead to the origin of life?

• High oxygen levels

• Cool climate

• Presence of complex animals

• Hot temperatures and chemical-rich atmosphere

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