Mitochondria

Question 1

Introduction to Mitochondria

Answer 1

Mitochondria unless they are deeply stained, they are not visible under microscope

Question 2

Do number of mitochondria vary per cell?

Answer 2

yes, number of mitochondria per cell varies depending upon the physiological activities of the cell

Question 3

Is there variation in shape and size?

Answer 3

In terms of shape and size considerable degree of variablity is observed’

Question 4

for Example

Answer 4

Typical Sausage or cylinder shaped having diameter 0.2 - 1m

Question 5

Comment about internal structures of mitochondria?

Answer 5

Mitochondrion is a double membrane bound organelle, which is outer membrane and inner membrane
these membranes divide the lumen into two distinct aqueous compartments.

Question 6

comment about the inner compartment

Answer 6

Inner compartment contains a dense homogenous substance known as matrix

Question 7

comment about outer membrane

Answer 7

it forms continous limiting boundary with the organelle

Question 8

comment about the inner membrane

Answer 8

it forms number of infoldings known as cristae towards matrix

Question 9

Overall functions of outer and inner membrane

Answer 9

two membranes have their own specific enzymes associated with mitochondrial functions

Question 10

Functions of Mitochondria

Answer 10

Mitochondria is
- an site for aerobic respiration
- produces cellular energy in the form of ATP , hence known as power house of cell
- The matrix posses single circular DNA
- it also possess RNA molecules
-ribosomes
- contains contents required for synthesis of protein

Question 11

How does mitochondria divide?

Answer 11

divides through fission