Question

Cristae occur in
a. Golgi body
b. Nucleus
c. Mitochondria
d. E.R

Answer 1

Hint: Cristae present the inner membrane of the mitochondria and electron transport chain of the cristae creating the space between outer and inner membrane with the help of electrochemical gradient.

Complete answer:
Mitochondrion is a part in which the crista is bound in the inner membrane and plays a role in the surface area for chemical reaction and wrinkled shape occurs on the inner membrane. Mitochondria requires oxygen that’s present in the aerobic cellular respiration, and also with ATP synthase, cytochromes and proteins.

In electrochemical gradient, NADH molecules get oxidized into the $NAD^{+}$ and $H^{+}$ ions and $FADH_2$ oxidized into the FAD and $H^{+}$ ions. Between the intermembrane space that’s obtained by electrochemical gradients, NADH and $FADH_2$ gradually increase energy through the electron transport chain. Proton motive force obtained inside the mitochondrial membrane by the process potential energy that’s created by the electrochemical gradient.

Phosphate group enzyme ATP synthase produces ATP from ADP by the process known as chemiosmosis. The concentration gradient potential energy formed from the $H^{+}$ ions. By the ATP synthase of the mitochondrial matrix these $H^{+}$ passed and later used to help to reform water $(H_{2}O)$. The cristae play a vital role in the reaction that occurred in the surface area of the inner membrane and high surface area provided to the ATP generation.

Hence, the correct answer is option (C).

Note: Mitochondria is known as the powerhouse of the cell and cristae occur in the mitochondria that’s present in all eukaryotic cells. The inner membrane is folded with cristae and helps to increase surface area. ATP molecules synthesize in the inner mitochondrial membrane that is embedded with the help of enzyme synthase.