aerobic respiration pt.2 the squeaquel

Question 1

what are some products of the krebs cycle also used in

Answer 1

oxidative phosphorylation

Question 2

in the krebs cycle, where does 1 coenzyme A go

Answer 2

reused in the next link reaction

Question 3

in the krebs cycle, where does oxaloacetate go

Answer 3

regenerated for use in the next krebs cycle

Question 4

in the krebs cycle, where does 2C02 go

Answer 4

released as a waste product

Question 5

in the krebs cycle, where does 1ATP go

Answer 5

used for energy

Question 6

in the krebs cycle, where does 3 reduced NAD go

Answer 6

to oxidative phosphorylation

Question 7

in the krebs cycle, where does 1 reduced FAD go

Answer 7

to oxidative phosphorylation

Question 8

what does oxidative phosphorylation produce

Answer 8

lots of ATP

Question 9

what is oxidattive phosphorylation

Answer 9

Oxidative phosphorylation is the process where the energy carried
by electrons, from reduced co enzymes (reduced N AD and reduced
FAD), is used to make ATP. (The whole point of the previous stages
is to make reduced N AD and reduced FAD for the final stage).

Question 10

what does oxidative phosphorylation involve

Answer 10

Oxidative phosphorylation involves the electron transport chain
and chemiosmosis

Question 11

what are proteins pumped across

Answer 11

the inner mitochondrial membrane

Question 12

what is the first step to oxidative phosphorylation

Answer 12

Hydrogen atoms are released from reduced NAD and reduced FAD as they’re
oxidised to NAD and FAD, The H atoms split into protons (H +) and electrons (e-)

Question 13

what is the second step to oxidative phosphorylation

Answer 13

The electro ns move down the electron transport chain (made up of electron carriers),
losing energy at each carrier.

Question 14

what is the third step to oxidative phosphorylation

Answer 14

This energy is used by the electron carriers to pump protons from the mitochondrial matrix into the
intermembrane space (the space between the inner and outer mitochondrial membranes).

Question 15

what is the fourth step to oxidative phosphorylation

Answer 15

The concentration of protons is now higher in the intermembrane space than in the
mitochondrial matrix — this forms an electrochemical gradient (a concentration gradient of ions).

Question 16

what is the fifth step to oxidative phosphorylation

Answer 16

Protons then move down the electrochemical gradient, back across the inner mitochondrial membrane and
into the mitochondrial matrix, via ATP synthase (which is embedded in the inner mitochondrial membrane).
This movement drives the synthesis of ATP from A DP and in organic phosphate (Pj).

Question 17

what is the sixth step to oxidative phosphorylation

Answer 17

This process of ATP production driven by the movement of H + ions across a membrane (due to electrons
moving d own an electron
transport chain) is called
chemiosmosis (which
is described by the
chemiosmotic theory).

Question 18

what is the seventh step to oxidative phosphorylation

Answer 18

In the mitochondrial matrix,
at the end of the transport
chain, the protons, electrons
and 0 2 (from the blood)
com bine to form water.
Oxygen is said to be the final
electron acceptor.