Question

Question 8

The electrons of ________________ are donated to the first complex of the electron transport chain and as a result ______________________ are transported across the inner membrane.

Group of answer choices

A. ATP: H+

B. ATP: electrons

C. NADH: H+

D. NADH: electrons

Question 9

The final electron acceptor in the electron transport chain is

Group of answer choices

A. CO2

B. H2O

C. O2

D.Cytochrome C

Question 10

How do the catabolic metabolic pathway rapidly respond to energy needs in the cell?

Group of answer choices

A. The intermediates in the pathways can be quickly degraded to stop the pathways.

B. The genes coding for the enzymes in the pathway are regulated up or down.

C. Enzymes in the pathways are regulated up or down by such molecules as ATP or NAD+.

D. The pathways are stopped by binding of inhibitory proteins to the specific enzymes in the pathway.

Answer 1

Answer - 8 option C is correct option.

Because in the metabolism NADH, FADH Are generated by the Glycolysis , pyruvate dehydrogenase complex reaction and Krebs cycle. These NADH and FADH move for the ETS (electron transport system) .The electron of NADH are donated to the complex first (NADH dehydrogenase)and electron of FADH are donated to the complex second (sucienate dehydrogenase) than qunone and than cytochrome system. In these transfer of electron from NADH to last ecceptor protons are also moves from mitochondrial matrix to intermembrenous space( IMS) .

ANSWER - 9 option C is correct

During the ETS(electron transport system) the source of electron NADH and FADH and last ecceptor of electron is O2 . After the accepting of electron from the ETS oxygen is convert into water Due to transport of protons again the concentration ATP are forms.

ANSWER - 10 Option Cis correct.

Enzymes in the metabolic pathways are regulated op or down by the such molecules as ATP, FADH, NADH ans someone other acetyl co enzyme A, pyruvate, .

Because in these pathways many of the allosteric enzyme regulate these pathways.

The enzymes are regulated by on substrate( AMP ,ADP NAD+ ,FAD+ and acetl co enzyme A )and product( pyruvate, ATP, NADH, FADH) and these molecules are also energy swichs.