Properties and Functions of Biological Molecules Quiz

Which property of water is useful to the human body?

• Water is nonpolar and therefore can be used in many chemical reactions in the body.

• Water is a solvent that helps remove and carry substances throughout the body.

• Water has a pH below 6 and can dissolve food taken in by the body.

• Water is able to freeze within the cells of the body.

Tags

NGSS.MS-LS1-2

Which characteristic of water contributes to its special, life-sustaining properties?

• Ionic bonds that create polarity

• Unequal sharing of electrons that creates polarity

• Low boiling point that contributes to high heat capacity

• Presence of oxygen that causes oxygen bonds between molecules

Tags

NGSS.HS-ESS2-5

Which macromolecule is associated with the following functions: energy, plant structure formation, and exoskeleton construction?

• Proteins

• Lipids

• Carbohydrates

• Nucleic acids

Which function below is performed by a macromolecule made of nucleotides?

• Direct protein synthesis

• Provide energy

• Direct nerve impulses

• Function as enzymes

Tags

NGSS.HS-LS1-1

All but one of the following statements are examples of how an enzyme might lower the activation energy of a chemical reaction. Which example is the exception?

• By donating or accepting protons

• By modifying the path of a reaction

• by changing the equilibrium state of a chemical reaction

• By providing an alternative reaction pathway

Tags

NGSS.HS-PS1-5

Amylase is an enzyme found in saliva that helps break down starches into glucose. Which of these statements best describes how amylase starts this reaction?

• Amylase binds to the glucose to start the reaction.

• Amylase provides extra energy to start the reaction.

• Amylase decreases the energy needed to start the reaction.

• Amylase changes the shape of the starch to start the reaction.

A researcher investigates the solubility of a new compound in water. Which action would best validate the data collected on the solubility of the new compound?

• Studying other properties of the compound

• Measuring the solubility of other substances

• Having a science expert measure the solubility

• Repeatedly testing the solubility at various temperatures

Which source will provide the most reliable report on the effect of herbicides on human health?

• A website for a garden center

• A peer-reviewed science journal

• An editorial article in a local newspaper

• A newsletter for a community health and nutrition group