Enzymes And Hormones

Question 0

What is lowered by an enzyme in a reaction?

Answer 0

Activation energy

Question 1

Most enzymes are what kind of biomolecule?

Answer 1

Proteins

Question 2

Which is false?
A.enzyme is used up in the reaction process
B.equilibrium is unaffected by enzyme
C.weak interactions bet.substrate and enzyme drive energy used for enzymatic rate

Answer 2

A.enzyme is used up in the reaction process

Since enzyme is organic catalyst, it is not used up :)

Question 3

___ state: enzyme-subtrate (ES) complex formation rate balances with ES complex reaction rate

Answer 3

Steady

Question 4

Time it takes for all the enzyme to form complex with substrate

Answer 4

Maximum rate, or Vmax

Question 5

Substrate concentration resulting in reaction rate equal to one-half Vmax

Answer 5

Km/Michealis constant

Question 6

When enzyme is saturated with substrate, how many substrate molecules are converted to product in a given period of time? This quantity is called __

Answer 6

Kcat

Question 7

Formula for specificity constant (good measure of catalytic activity)
A. Kcat + Km
B. Kcat x Km
C.Kcat - Km
D. Kcat / Km

Answer 7

D. Kcat / Km

Question 8

Which is false?
A.for mammals,most enzymes work best at body temp or near body temp
B.optimum pH for most enzymes is 6-8
C.enzyme concentration is directly proportional to reaction rate
D. The higher the Vmax, the higher the Km

Answer 8

D.The higher the Vmax, the higher the Km

Vmax and Km are inversely proportional.