D Part 2

Question 1

What are the roles of alternative oxidase (AOX) in the mammalia?

Answer 1

To ‘roboot’ an overly reduced quinone pool by oxidising it back to quinone from quinoa AND to generate heat during (hibernation)

Question 2

Which vitamin of B complex is coenzyme A derived from?

Answer 2

Panothenate

Question 3

What is the correct order of the intermediates of ‘Krebs cycle’?

Answer 3

Acetyl-CoA, citrate, cis-aconitate, isocitrate, 2-oxoglutarate, succinyl-CoA, succinate, fumarate, malate, oxaloacetate

Question 4

What is the function of a carboxysome?

Answer 4

To elevate the pCO2 around RuBisCO and exclude O2

Question 5

What is plastocyanin?

Answer 5

A blue copper protein that carries electrons from b6f complex to PSI

Question 6

What is the net reaction of Krebs cycle in the eukarya ?

Answer 6

Acetyl-CoA- ->2CO2 + GTP + 3NADH + QH2

Question 7

Photosystem I contains..

Answer 7

P700 reaction centre based on Chl a-Chl a dimer plus Chl a , Chl b , phylloquinone and carotenoids

Question 8

How many electrons can ubiquinone-10 and cytochrome c carry?

Answer 8

2 on ubiquinone-10 and 1 on cytochrome c

Question 9

Which respiratory quinone is used in all eukarya?

Answer 9

Ubiquinone-10

Question 10

Chlorobi….

Answer 10

Assimilate CO2 using the arnon-Buchanan cycle and use H2S as their electron donor

Question 11

What are the coupling sites in the respiratory chain of the mitochondria of eukarya?

Answer 11

NADH dehydrogenase, the bc1 complex and the cytochrome c oxidase

Question 12

What is the path of electron flow from NADH in the standard respiratory chain of mitochondria in the eukarya?

Answer 12

NADH - - >NADH dehydrogenase- - > quinone pool - -.bc1 complex - - > cyt c - ->aa3oxidase- ->O2

Question 13

Where are respirator quinones located in the mitochondrion?

Answer 13

Dissolved in the inner mitochondrial membrane

Question 14

What does fluorocitrate do?

Answer 14

Permanently inhibits aconitate hydratase

Question 15

Which intermediate of Krebs cycle is used in anabolism to make Purine bases?

Answer 15

2-oxoglutarate

Question 16

The link reaction is which reaction?

Answer 16

Pyruvate+ CoA+NAD+- -> acetyl-CoA+NADH+CO2

Question 17

What inhibits the Fo sector of the ATP synthase?

Answer 17

Oligomycin

Question 18

In an experiment, a suspension of mitochondria obtained from liver are incubated with NADH and the production of ATP is monitored. On adding the substance 2,4-dinitrophenol, ATP production stopped. What is the 2,4-dinitrophenol doing?

Answer 18

Uncoupling the proton gradient by trafficking protons back across the membrane into the matrix

Question 19

In non-cyclic photophosphorylation in the viridiplantae, how many hydrogen Ions end up in the thylakoid lumen from the process as a whole for each molecular oxygen formed during the process?

Answer 19

8