Base Review

Which statement best describes the graph shown?

• Reaction B occurs at a slower rate.

• The original reaction is catalyzed.

• Less energy is needed to start reaction B.

• More energy is released by the original reaction.

Tags

NGSS.HS-PS1-4

Which phrase best describes an exothermic chemical reaction?

• releases more energy than it absorbs

• forms products with higher bond energy than reactants

• does not absorb any energy

• is in a state of equilibrium

Tags

NGSS.HS-PS1-4

Which of the following conclusions can be drawn from this graph?

• The optimum pH of the enzyme is 6.6.
  

• The optimum pH of the enzyme is 5.8
  

• The enzyme’s activity increases as pH increases 5.0 to 9.0
  

• The enzyme’s activity is greater around pH of 8.0 .
  

The specific reactants that an enzyme acts on are called

• catalysts

• substrates

• proteins

• amino acids

What happens to the speed of a chemical reaction when a catalyst is present?

• It becomes erratic.

• It stays the same.

• It speeds up.

• It slows down.

Tags

NGSS.HS-PS1-5

What is the term for the amount of energy that needs to be added for a chemical reaction to start?

• bond energy

• chemical energy

• activation energy

• reactant energy

An altered form of the protein collagen causes a condition where bones break easily. Which of the following are components of collagen?

• fatty acids

• amino acids

• nucleic acids

• monosaccharides

Tags

NGSS.HS-LS1-1

NGSS.HS-LS1-6

Fats, oils, and cholesterol are all types of

• fatty acids

• lipids

• hormones

• cell membranes

Tags

NGSS.MS-LS1-7

Which category of carbon-based molecules includes sugars and starches?

• proteins

• carbohydrates

• unsaturated fatty acids

• phospholipids

Carbon is unique due to the carbon atom’s

• hydrogen bonding strength

• ionic compounds

• six outer unpaired electrons

• bonding properties

Tags

NGSS.HS-LS1-6