Question

Mitochondria is regarded as a semi-autonomous organelle, due to the presence of
(a)DNA
(b)Ribosomes
(c)Vacuole
(d)Both A and B

Answer 1

Hint: They are regarded as semi-autonomous cell organelles due to the presence of two substances mainly. One of them has a circular structure and a similar structure is found in prokaryotic bacterias known as a plasmid. The other helps in protein synthesis and has two subunits with different sedimentation coefficients.

Complete answer:
Mitochondria are regarded as semi-autonomous organelle please due to the presence of DNA (deoxyribonucleic acid), that can replicate independently and synthesize their proteins with ribosomes. Mitochondrial DNA is known as Mt- DNA and ribosomes are called mitoribosomes.

The mitochondrial DNA produces mRNA, tRNA, and rRNA on its own which is translated into proteins by the mitoribosomes.
However, their structure and functioning are controlled by the nucleus of the cell and by the availability of cytoplasmic material hence they cannot exist independently because of which they are called semi-autonomous cell organelle.

So, the correct answer is, “Both A and B”.

Note: Mitochondrial DNA is responsible for maternal inheritance. mt-DNA is only a small portion of DNA in Eukaryotic cells which encodes only for 37 genes. In most species including humans, mtDNA is inherited solely from the mother therefore responsible for maternal inheritance.
Along with mitochondria, chloroplasts are also considered as semi-autonomous organelle which means it has its DNA and ribosome.