Question

Extranuclear inheritance is a consequence of presence of genes in

• A. Mitochondria and chloroplast
• B. Endoplasmic reticulum and mitochondria
• C. Ribosomes and chloroplast
• D. Lysosomes and ribosomes

Answer 1

The correct option is A

Mitochondria and chloroplast

The correct option is A:

Explanation of the correct option:

1. Mitochondria is a double-membrane-bound organelle that is also known as the powerhouse of the cell.
2. Chloroplast is a green plastid that contains chlorophyll and is responsible for photosynthesis.
3. Both mitochondria and chloroplast have their own circular DNA.
4. The genes present in these organelles lead to extranuclear inheritance.
5. Extracellular inheritance is also known as cytoplasmic inheritance and involves the transmission of genes outside the nucleus.

Explanation of the incorrect options:

Option B:

1. The endoplasmic reticulum does not possess its DNA and is not associated with extracellular inheritance.
2. But mitochondria have their DNA and are responsible for extranuclear inheritance.

Option C:

Ribosomes do not have their DNA.

Option D:

Lysosomes and ribosomes, both organelles, do not have their DNA.

Final answer: Extranuclear inheritance is a consequence of the presence of genes in mitochondria and chloroplast.