Unit 3: Cellular Energetics

[8.15] A system at chemical equilibrium _____.

• consumes energy at a steady rate

• can do no work

• has zero kinetic energy

• releases energy at a steady rate

[8.28] Which of the following is the most correct interpretation of the figure?

• ADP + P_i are a set of molecules that store energy for catabolism.

• Energy from catabolism can be used directly for performing cellular work.

• ATP is a molecule that acts as an intermediary to store energy for cellular work.

• P_i acts as a shuttle molecule to move energy from ATP to ADP.

Tags

NGSS.HS-LS1-7

The following reaction

A --> B + C + heat

is a(n) _____ reaction.

• endergonic

• anabolic

• exergonic

• dehydration synthesis

• exchange

Tags

NGSS.HS-PS1-4

Which of these reactions requires a net input of energy from its surroundings?

• catabolic

• endergonic

• exergonic

• hydrolysis

• ATP --> ADP + P

Tags

NGSS.HS-LS1-5

The reaction

ADP + P --> ATP

is a(n) _____ reaction.

• endergonic

• spontaneous

• chemical

• hydrolysis

• exergonic

Tags

NGSS.HS-PS1-4

What is the fate of the phosphate group that is removed when ATP is converted to ADP?

• It is acquired by a reactant in an exergonic reaction.

• It is acquired by a reactant in a spontaneous reaction.

• It is broken down into one phosphorus and four oxygen atoms.

• It is acquired by a reactant in an endergonic reaction.

Tags

NGSS.HS-LS1-7

Which of these is ATP?

• 
• 
• 
• 
• 

Tags

NGSS.HS-LS1-7

What type of reaction breaks the bonds that join the phosphate groups in an ATP molecule?

• dehydration synthesis

• anabolism

• hydrolysis

• entropic

• dehydration decomposition

In which region is the enzyme saturated with substrate?

• region A

• region B

• region C

[8.30] Which of the following is true of enzymes?

• Enzymes increase the rate of chemical reaction by lowering activation energy barriers.

• Enzymes increase the rate of chemical reaction by providing activation energy to the substrate.

• Enzyme function is increased if the 3- D structure or conformation of an enzyme is altered.

• Enzyme function is independent of physical and chemical environmental factors such as pH and temperature.

Tags

NGSS.HS-PS1-4

NGSS.HS-PS1-5