M9

Question 1

Amino acid synthesis is generally regulated by:

Answer 1

feedback and allosteric enzyme regulation.

Question 2

Organisms capable of carrying out reduction of atmospheric nitrogen include:

Answer 2

some bacteria and archaea.

Question 3

Essential amino acids are synthesized by:

Answer 3

micro-organisms and plants

Question 4

What cofactor(s) carry activated methyl groups?

Answer 4

S-adenosylmethionine

Question 5

What is the first fully formed purine nucleotide in nucleotide biosynthesis?

Answer 5

IMP

Question 6

What is one fundamental difference between the synthesis of purine nucleotides and pyrimidine nucleotides?

Answer 6

The base of pyrimidine nucleotides is synthesized and subsequently condensed with PRPP

Question 7

Both de novo and salvage paths are used in the synthesis of:

Answer 7

ribonucleotides.

Question 8

CTP is synthesized from:

Answer 8

UTP

Question 9

The competitive inhibitor(s) of dihydrofolate reductase is/are:

Answer 9

aminopterin and methotrexate

Question 10

Electrons flow from photosystem II to photosystem I through the ________________ complex.

Answer 10

cytochrome bf

Question 11

In the light reactions of photosynthesis, the cooperation between photosystem I and photosystem II creates a flow of electrons from H2O to ________________.

Answer 11

NADP

Question 12

Plants store glucose as ___________ and ____________.

Answer 12

starch, sucrose

Question 13

________ rounds of the Calvin cycle are required for the production of hexose.

Answer 13

6

Question 14

____________ is another name for ribulose 1,5-bisphosphate carboxylase/oxygenase.

Answer 14

RuBisCO

Question 15

Glutamine synthetase adds NH3 to __________________ to make glutamine.

Answer 15

glutamate

Question 16

________________ is the the enzyme that synthesizes deoxyribonucleoside diphosphates from ribonucleoside diphosphates

Answer 16

ribonucleotide reductase