Unit 1: Chemistry of Life

Which building blocks are correctly matched to the macromolecule they form?

• Amino acids make proteins.

• Glucose molecules make lipids.

• Nucleotides make carbohydrates.

• Fatty acid chains make nucleic acids.

Which of the following statements illustrates why carbon atoms are so important in living organisms?

• Carbon atoms contain large stores of energy.

• Carbon is found in most inorganic compounds.

• Carbon atoms are polar which allows them to dissolve many compounds.

• Carbon is able to bond to many other atoms to form large and complex molecules.

Tags

NGSS.HS-LS1-6

Which of the following groups of macromolecules are composed of three fatty acid chains bonded to a glycerol?

• lipids

• proteins

• nucleic acids

• carbohydrates

The graph below shows the progress of a biochemical reaction.

What effect would an enzyme have on the reaction?

• An enzyme would increase the amount of energy at Point 3.

• An enzyme would increase the amount of energy needed at Point 1.

• An enzyme would decrease the energy needed to move from Point 1 to Point 2.

• An enzyme would cause the amount of energy at Point 1 and Point 3 to switch places.

Tags

NGSS.HS-PS1-5

The diagram below shows three repeating units of a polymer.

Which of the following molecular structures make up the repeating units shown in the diagram?

• fatty acid

• nucleotide

• amino acid

• monosaccharide

Which group of macromolecules is responsible for transferring genetic information

to new cells?

• lipids

• proteins

• nucleic acids

• carbohydrates

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A water molecule is composed of 2 Hydrogen atoms and 1 Oxygen atom. What is the chemical equation for water?

• HO

• H₂O

• H₃O

• H₂O₂

Tags

NGSS.MS-PS1-1

Water is a polar molecule, which means it has a positive and a negative side. Hydrogen bonds form when:

• _{The positive end of one water molecule bonds to the positive end of another water molecule.}

• _{The negative end of one water molecule bonds to the negative end of another water molecule.}

• _{The positive end of one water molecule bonds to the negative end of another water molecule.}

The ability of water molecules to stick to each other, creating surface tension is called:

• Cohesion

• Adhesion

• Insulation

• pH

Tags

NGSS.HS-ESS2-5

The fact that water can stick to other substances is called:

• pH

• Adhesion

• Cohesion

• Insulation

Tags

NGSS.HS-ESS2-5