Question

What is mitoplast?
A Membraneless Mitochondria
B Another name of Mitochondria
C Mitochondria without outer membrane
D Mitochondria without inner membrane

Answer 1

It consists of the membrane that has finger-like projection called cristae. This membrane provides space for chemical reaction.

Complete answer:
To answer this question, first, we need to know about the mitochondria. Mitochondria are cell organelles found in aerobic eukaryotes and are absent in prokaryotes and anaerobic eukaryotes. Mitochondria are known as powerhouses of the cell because they are the major centres of the release of energy. A mitochondrion contains two membranes and two chambers, outer and inner. The two membranes constitute the envelope of the mitochondrion.

Now lets us find the solution from the given options-

Mitochondria have two membranes, inner and outer membranes. The outer membrane is smooth and is permeable to many metabolites and the inner membrane has a large number of particles and is permeable to only some metabolites.
Chondriosome is another scientific term of mitochondria and is also known as the powerhouse of the cell.
A mitoplast is a mitochondrion stripped of its outer membrane which leaves the inner membrane intact. This is a mitochondria without outer membranes and the inner membrane has finger-like projection known as cristae and the capability of oxidative phosphorylation is maintained in it.
The inner membrane is present in mitoplast in which oxidative phosphorylation takes place.

Thus, the right answer is option C i.e., Mitochondria without outer membrane.

Note: The outer membrane is removed in the mitoplast and leaves the inner membrane and matrix intact. To remove the outer membrane biochemical fractionation is used which uses detergents such as digitonin. The inner membrane keeps maintaining oxidative phosphorylation.