metabolism

Question 1

net result form embden-meyerhof pathway

Answer 1

2 atp
2 nadh

Question 2

net result form entodeuderon pathway

Answer 2

1 atp
1 nadh
1 nadph

Question 3

net result form ribolous pri phosphate

Answer 3

2 atp and 2 nadh

Question 4

in Krebs cycle where do you get atp

Answer 4

2 from glycolisis
2 from krebs cyccle

Question 5

what is the ATP yield during prokaryotic aerobic respiration

Answer 5

Glycolysis:
- oxidation of glucose to pyruvic acid: 2 ATP
- production of 2 NADH: 6 ATP
Perparatory step
- formation of acetyl CoA produces 2NADH and 6 ATP
Krebs cycle
- oxidation of succinyl CoA to succinic acid: 2GTP
- production of 6 NADH: 18 atp
- production of 2 FADH: 4 atp
total: 38 atp

Question 6

where do you get ATP from?

Answer 6

2 from glycolysis
2 from kreb cycle
the rest 34 from coenzyme oxidation:)

Question 7

what are the final electron acceptors

Answer 7

• O2 (aerobic respiration)
• NO3, SO4 (anaerobic respiration
• Organic compound (fermentation)

Question 8

what kind of respiration generates the most atp

Answer 8

1. O2 aerobic resperation
2. no3, so4 anaerobic resperation
3. organic compound (fermentation)

Question 9

Lithotrophs are

Answer 9

microorganisms that use inorganic compounds as electron donors to conserve energy for growth.
Use CO2

Question 10

anoxygenic photosynthesis

Answer 10

instead of water as a source electrons they use hydrogen sulfide as a source of electrons

Question 11

what is the pentose phosphate pathway important for

Answer 11

synthesis of purines and pyrimidiens and ultimately DNA and RNA

Question 12

what is the mechanism of enzymatic action?

Answer 12

1. substrate binds to active site which forms the enzyme-substrate comlex
2. products formed
3. enzymes are always produced and are not controlled by genes turning on and off

Question 13

what is a competitive inhibitor

Answer 13

an inhibitor that binds to the active site
ex: para amino benzoic acid and sophanidomide

Question 14

what is a non-competative inhibitor

Answer 14

Non-competitive because it does not bind to the active site
an inhibitor that binds somewhere other than the active site.
It changes the shape of the enzyme molecule so that it doesnt bind to the substrate

Question 15

what is allosteric inhibition

Answer 15

used to regulate enzyme activity in metabolism
- Most are end products used in a feedback loop that binds to enzyme and alters its activity.
- throttle down metabolism
- ex: phosphofructo kinase (adds a phosphate)

Question 16

Examples of allosteric inhibitors that inhibit phosphofrucctokinase

Answer 16

• atp
• citrate
• nadh