bioenergetics

Question 1

from one pyruvate molecule how many NADH molecules are formed during krebs cycle

Answer 1

3
(6 from 1 glucose)

Question 2

about — % of photosynth is caused by terrestial plants while the rest occurs in lakes and oceans

Answer 2

10

Question 3

air contains —- % of CO2

Answer 3

0.03 - 0.04

Question 4

the % of light absorbed the the leaf

Answer 4

1

Question 5

breaking of the terminal phosphate of ATP releases about — Kcal of energy

Answer 5

7.3

Question 6

2 most effective wavelengths absorbed by max pigments

Answer 6

430 and 670

Question 7

the final electron acceptor during non cyclic electron pathway is

Answer 7

NADP+

Question 8

NADP+ reductase transfers electrons from in ETC of non cyclic

Answer 8

ferredoxin to NAPH

Question 9

if 12 NADPH are used in calvin cycle , then how many glucose molecules will be formed

Answer 9

1
(calvin cycle occurs 6 times to produce 1 glucose as 5 carbons of G3P are used for RuBP regeneration. 2 nadph used percycle)

Question 10

what is the ratio of ATP to NADPH used for every 3 CO2 fixed in one cycle

Answer 10

3 : 2

Question 11

the oxidation os succinate into furmate produces

Answer 11

FADH2

Question 12

what is required as a precursor for synthesis of fumarate in the krebs cycle

Answer 12

amino acid aspartate

Question 13

how many CO2 are produced in a single krebs cycle

Answer 13

2
(4 for one glucose)

Question 14

PFK1 phosphofuctokinase is inhibited by by

Answer 14

high conc of ATP and citrate

Question 15

high conc of NADH inhibits

Answer 15

pyruvate kinase (production of pyruvate)

Question 16

the reaction which occurs in thylakoid interior space

Answer 16

photolysis

Question 17

in which color of light is photosynthesis maximum

Answer 17

red light

Question 18

When NAD+ is converted to NADH, it gains two things:

Answer 18

2 electrons and 1 proton

Question 19

how many ATP molecules should be produced from the complete oxidation of acetyl coenzyme A

Answer 19

Each acetyl CoA enters into citric acid cycle and yields 3 NADH
(9 ATP), 1 FADH
(2 ATP) and 1 GTP (1 ATP). Therefore, altogether 12 ATP molecules will be produced

Question 20

The only 5C-intermediate of Krebs cycle

Answer 20

α-ketoglutaric acid

Question 21

which part of the chlorophyll molecule absorbs light?

Answer 21

porphyrin ring

Question 22

the enzyme which forms glucose 6 phosphate

Answer 22

hexokinase

Question 23

the light absorbing hydrophyllic part of chlorophyll is

Answer 23

flat and square shaped

Question 24

in chlorophyll head at atom of magnesium is coordinated with

Answer 24

nitrogen of each pyrrole ring

Question 25

what color is chlorophyll a

Answer 25

blue green

Question 26

chlorophyll molecules are soluble in

Answer 26

organic solvents

Question 27

absorptive peaks of chlorophyll b

Answer 27

450-475 nm

Question 28

molecular formula of chlorophyll a

Answer 28

C55H72O5N4Mg
(ch3 functional group)

Question 29

in noncyclic electron TC of light reaction (PSll) the first e- acceptor is

Answer 29

PQ

Question 30

how much net gain of RUBP is obtained after one calvin cycle?

Answer 30

3

Question 31

for every 3 molecules of CO2 in calvin cycle how much G3P is produced?

Answer 31

6

Question 32

total vs net gain pf ATPs produced by glycolysis

Answer 32

net : 6
total:10

Question 33

formula to determine no. of Atps produced by fatty acid

Answer 33

No of carbons x 6

Question 34

primary electron acceptor for PSl

Answer 34

FRS