Energy, Enzymes, and Biological Reactions

Where do substrates bind on an enzyme?

• allosteric site

• surface receptor

• calcium channel

• active site

Enzymes are capable of increasing the rate of a chemical reaction through which of the following means?

• changing ΔG

• reducing the activation energy

• changing the equilibrium point of the reaction

• increasing kinetic energy

Tags

NGSS.HS-PS1-5

How are enzymes different from a catalyst like a match?

• they are reusable

• they add more heat than matches

• they are living things

• they provide activation energy

Tags

NGSS.HS-LS1-7

Any substance that is acted upon by an enzyme is called a(n)?

• Coenzyme
• Substrate
• Vitamin
• Polypeptide

Based on the graph, what temperature is optimum for this enzyme?

• 15 C

• 40 C

• 30 C

The induced fit model says enzymes:

• enzymes can operate in a wide range of conditions
• enzymes are specific to a substrate like a lock & key
• enzymes are activated by neighboring molecules
• enzymes mold with their substrates for a good fit

Lines 1 and 2 show 2 different:

• Free energies (ΔG)
• Enthalpies (ΔH)
• Activation energies (E_a)
• Entropies (ΔS)

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

Inorganic molecules (like metal ions) that bind to enzymes and enhance an enzyme's ability are called:

• CoFactors
• CoEnzymes
• Allosteric Inhibitors
• Allosteric Activators

Organic molecules (like vitamins) that temporarily bind to enzymes and enhance an enzyme's ability are called:

• CoFactors
• CoEnzymes
• Allosteric Inhibitors
• Allosteric Activators

When an enzyme is denatured:

• The secondary & tertiary structures unfold

• The primary structure of the enzyme breaks down

• Allosteric sites are bound to inhibitors

• The enzyme is working at its maximum rate