True or False

Question 1

Each enzyme has a pH optimum at which it best functions.

Answer 1

True

Question 2

Enzymes function equally well at any pH.

Answer 2

False

*specific

Question 3

Enzyme show specificity for one stereoisomer of a molecule over the other stereoisomer.

Answer 3

True

Question 4

Enzymes do no show specificity for one stereosiomer of a molecule over the other stereoisomer.

Answer 4

False

Question 5

The increase in rate of an enzyme-catalyzed reaction with increasing substrate is not saturable.

Answer 5

False

Question 6

Catalysis of enzymes depends solely on the amino acid side chains of enzymes.

Answer 6

False

Question 7

The increase in rate of an enzyme-catalyzed reaction with increasing substrate is saturable.

Answer 7

True

Question 8

Inhibition of an enzyme by a competitive inhibitor can be overcome with excess of substrate.

Answer 8

True

Question 9

Inhibition of an enzyme by a competitive inhibitor is reversible.

Answer 9

True

Question 10

Inhibition of an enzyme by a competitive inhibitor can not be overcome with excess of substrate.

Answer 10

False

Question 11

Inhibition of an enzyme by a competitive inhibitor is irreversible.

Answer 11

False

Question 12

Protein kinase A is stimulated by removal of an inhibitory subunit.

Answer 12

True

Question 13

Protein kinase A is inhibited by removal of an inhibitory subunit.

Answer 13

False

Question 14

Anytime something gets oxidized, something else has to get reduced.

Answer 14

True

Question 15

TCA is the central core of metabolism.

Answer 15

True

Question 16

Enzyme catalyzed reactions get faster in direct proportion to the concentration of substrate.

Answer 16

False

*Should be [E].

Question 17

Dehydrogenases are enzymes that catalyze the transfer of electrons from one molecule to another.

Answer 17

True

Question 18

Anaerobic metabolism can be damaging to a cell.

Answer 18

True

Question 19

Increasing the reaction temperature of a chemical reaction makes activation energy for that reaction more readily available.

Answer 19

True

Question 20

Pyruvate dehydrogenenase is a multi-enzyme complex.

Answer 20

True

Question 21

The TCA cycle is physiologically reversible.

Answer 21

False

Question 22

Oxidative phosphorylation is a membrane transport process.

Answer 22

True

Question 23

Only monosaccarides are absorbed in digestion

Answer 23

True

Question 24

The enzyme that synthesizes RNA from a DNA template is DNA polymerase.

Answer 24

False.

The enzyme that synthesizes RNA from a DNA template is RNA polymerase.

Question 25

The enzyme that synthesizes RNA from a DNA template is RNA polymerase.

Answer 25

True

Question 26

Synthesis is always in the 3' to 5' direction.

Answer 26

False. Synthesis is always in the 5' to 3' direction.

Question 27

RNA synthesis in transcription is regulated by specific RNA sequences termed promoters.

Answer 27

False. RNA synthesis in transcription is regulated by specific DNA sequences termed promoters.

Question 28

RNA synthesis in transcription is regulated by specific DNA sequences termed promoters.

Answer 28

True

Question 29

RNA synthesis in transcription is regulated by specific RNA sequences termed initiators.

Answer 29

False. RNA synthesis in transcription is regulated by specific DNA sequences termed promoters.

Question 30

In transcription, elongation occurs in fits and starts in both initiation and elongation.

Answer 30

False. Unlike initiation, elongation is a highly processive process in transcription.

Question 31

In eukaryotes transcription takes place in the nucleus and translation takes place in the cytoplasm; the two processes are uncoupled.

Answer 31

True