enzyme quiz

Last updated over 5 years ago

6 questions

1

A solution of starch at room temperature does not readily decompose to form a solution of simple sugars because

the starch solution has less free energy than the sugar solution

the hydrolysis of starch to sugar is endergonic

the activation energy barrier for this reaction cannot easily be surmounted at room temperature

starch cannot be hydrolyzed in the presence of so much water

Increasing the substrate concentration in an enzymatic reaction could overcome which of the following factors that are depressing rate of reaction?

denaturation of the enzyme

competitive inhibition

saturation of the enzyme activity

non-competitive inhibition

When you have a severe fever, what grave consequenes may occur if fever is not controlled?

destruction of your enzyme's primary structure

removal of amine groups from your proteins

change in the tertiary structure of your enzymes

removal of the amino acids in the active sites of your enzymes

Some of the drugs used to treat HIV patients are competitive inhibitors of the HIV reverse transcriptase enzyme. Unfortunately, the high mutation rate of HIV means that the virus rapidly acquires mutations with amino acid changes that make them resistant to these competitive inhibitors. Where in the reverse transcriptase enzyme would such amino acid changes most likely occur in drug-resistant viruses?

in or near the active site

at the allosteric site

in regions of the protein that determine packaging into the virus

anywhere, with equal probability

For an enzyme-catalyzed reaction which occurs at an optimal temperature 50°C, which of these treatments will not be expected to cause an increase in the rate of the reaction?

increasing the temperature to 100°C

increasing the concentration of the substrate

increasing the enzyme concentration

increasing the concentration of substrate, while reducing the concentration of enzyme by half.

A solution of starch at room temperature does not readily decompose to form a solution of simple sugars because

the starch solution has less free energy than the sugar solution

the hydrolysis of starch to sugar is endergonic

the activation energy barrier for this reaction cannot easily be surmounted at room temperature

starch cannot be hydrolyzed in the presence of so much water

Increasing the substrate concentration in an enzymatic reaction could overcome which of the following factors that are depressing rate of reaction?

denaturation of the enzyme

competitive inhibition

saturation of the enzyme activity

non-competitive inhibition

When you have a severe fever, what grave consequenes may occur if fever is not controlled?

destruction of your enzyme's primary structure

removal of amine groups from your proteins

change in the tertiary structure of your enzymes

removal of the amino acids in the active sites of your enzymes

Some of the drugs used to treat HIV patients are competitive inhibitors of the HIV reverse transcriptase enzyme. Unfortunately, the high mutation rate of HIV means that the virus rapidly acquires mutations with amino acid changes that make them resistant to these competitive inhibitors. Where in the reverse transcriptase enzyme would such amino acid changes most likely occur in drug-resistant viruses?

in or near the active site

at the allosteric site

in regions of the protein that determine packaging into the virus

anywhere, with equal probability

For an enzyme-catalyzed reaction which occurs at an optimal temperature 50°C, which of these treatments will not be expected to cause an increase in the rate of the reaction?

increasing the temperature to 100°C

increasing the concentration of the substrate

increasing the enzyme concentration

increasing the concentration of substrate, while reducing the concentration of enzyme by half.