2.19 Test Study Guide: The Chemistry of Life

Which type of macromolecule is the sugar fructose?

• protein

• lipid

• carbohydrate

• nucleic acid

How many sugar molecules make up simple carbohydrates?

• 1 or 2

• 2 or 3

• 3 or 4

• 4 or 5

Tags

NGSS.HS-LS1-6

The amount of energy needed for a reaction to take place is the activation energy. Enzymes can lower the activation energy of a chemical reaction.

Which statement describes a way that this could happen?

• Molecules can be brought together so they will bond more easily

• The enzyme distributes ATP to cells and then is destroyed

Tags

NGSS.HS-LS1-7

Which statement best explains how enzymes speed up chemical reactions?

• Enzymes use light energy to speed up reactions

• Enzymes gain heat from chemical reactions

• Enzymes lower the activation energy of a reaction

Which characteristic do glycogen and starch share?

• Both are storage forms of glucose

• They are the most energy-rice organic molecules

• They are proteins

Which molecule do mammals use to store extra glucose in their muscles?

• myosin

• glycogen

• baleen

• starch

Which molecule do plants use to store extra glucose?

• myosin

• glycogen

• baleen

• starch

Tags

NGSS.MS-LS1-6

Which element is present in all amino acids, but not necessarily in fats or carbohydrates?

• oxygen

• hydrogen

• carbon

• nitrogen

All amino acids have a central carbon with four components attached to it. One of these components is called the R group.

Which statement best describes the R group?

• R group stabilizes amino acid

• R group helps the amino acid replicate

• R group gives the amino acid unique characteristics

Which statement best explains how the structure of a starch molecule relates to its function?

• a branching structures provides many points where enzyme digestion can take place and release glucose molecules

• a branching structures makes the molecule stronger