U6 C1 Macromolecules

What is the polymer form of lipids?

• Polysaccharides

• Proteins

• Triglycerides

• DNA

How many calories per gram do lipids provide?

• 4 calories/gram

• 7 calories/gram

• 9 calories/gram

• 11 calories/gram

What is the primary characteristic of the hydrophobic tail?

• Water-loving

• Water-hating

• Electrically charged

• Neutral

What is the significance of the hydrophilic head in cell membranes?

• It repels water

• It attracts water

• It stores energy

• It provides rigidity

Which part of the phospholipid interacts with the aqueous environment?

• Hydrophobic tail

• Hydrophilic head

• Fatty acid chain

• Carbon backbone

What is a phospholipid bilayer?

• A single layer of lipids

• Two layers that make up the plasma membrane of cells

• A type of protein

• A carbohydrate structure

What is an example of a protein involved in movement?

• Contractile proteins

• Enzymes

• Hormones

• Receptors

What role do proteins usually play in energy storage?

• Primary source

• Secondary source

• Last resort

• Main storage

What is the significance of peptide bonds in proteins?

• They store energy

• They link amino acids

• They provide flavor

• They insulate cells

Which structure level is directly related to the amino acid sequence?

• Primary

• Secondary

• Tertiary

• Quaternary