Unit 3 Study Guide Quiz

DNA and RNA are examples of:

• Carbohydrates

• Lipids

• Proteins

• Nucleic Acids

This biomolecule contains Carbon, Hydrogen, Oxygen, and Nitrogen (CHON), but not Phosphorous:

• Carbohydrates

• Lipids

• Proteins

• Nucleic Acids

Which important monosaccharide is THE main source of energy food for cells?

• Lactose

• Glucose

• Fructose

• Sucrose

Which BEST explains how the structure/shape of an enzyme is related to its function?

• An enzyme's unique active site shape allows it to fit with only one substrate molecule.

• The shape of an enzyme allows it to work at any temperature.

• The enzyme's shape releases energy when it breaks down.

• An enzyme's shape allows it to react with many different types of substrates.

Which best describes the importance of carbohydrates to organisms?

• Carbohydrates provide storage for water molecules.

• Carbohydrates provide an additional source of amino acids.

• Carbohydrates provide permanent storage for genetic information.

• Carbohydrates provide an immediate energy source.

Which type of molecule do whales use for long-term energy storage and insulation?

• DNA

• glucose

• fat

• starch

Which molecules are joined together to make proteins?

• Fatty Acids

• Amino Acids

• Nucleic Acids

• Monosaccharides

What will most likely occur if there is a significant change in the temperature or pH of an enzyme outside of its best range?

• The shape of the enzyme changes so it won't be able to catalyze the reaction.

• The enzyme will become one of the products.

• The enzyme will speed up the reaction even more.

• The products of the reaction will become different.

Salivary amylase is an enzyme in humans that breaks down starches in digestion. More generally, what biomolecule would humans have difficulty digesting without this enzyme?

• Carbohydrates

• Lipids

• Proteins

• Nucleic Acids

Which statement best explains how sweating during exercise maintains homeostasis?

• It regulates mineral concentration in cells.

• It regulates body temperature.

• It maintains water balance.

• In maintains sugar balance in cells.