Where in typical eukaryotic cells do each of the following p

Where in “typical” eukaryotic cells do each of the following processes or events occur? (Be specific if the process or event occurs in only one part of an organelle. If you are not sure, give the location of the enzymes that catalyze the process.)

a) Pyruvate transporters

b) Synthesis of mitochondrial ribosomal RNAs

c) Oxidative phosphorylation of ATP

d) Where cytochrome c carry electrons from complex III to complex IV

Solution

(A) Pyruvate is transported to the mitochondria through a carrier protein which belongs to MCP protein family.

(B) mitochondria has its own genome which codes for the protein components of mitochondrial ribosomes bot ribosomal RNA is synthesized in the nucleus itself.

(C) oxidative phosphorylation of ATP takes place in the inner mitochondrial membrane where the enzyme ATPsynthase is present which phosphorylates ADP to ATP.

(D) cytochrome c is a part of complex III and it accepts electrons from Coenzyme Q and transfers them to oxygen molecule in complex IV.