Question

The organelle other than nucleus containing DNA is
A. Endoplasmic reticulum
B. Golgi Apparatus
C. Mitochondria
D. Lysosome

Answer 1

The DNA is present in the nucleus as well as in other membrane-bound organelles of a cell. It plays an important role in cellular respiration as it is involved in the synthesis of important molecules. The organelle other than nucleus containing DNA is a site where ATPs are produced.

Complete answer:
a) Endoplasmic reticulum: This organelle is present in connection with the nuclear envelope. It contains ribosomes which are responsible for protein synthesis. The ER also helps in the transport of proteins.
b) Golgi apparatus: It is a sac-like organelle in the cell which functions in sorting and assembly of proteins. It is a membranous organelle.
c) Mitochondria: It is called the powerhouse of the cell as it is the main centre for the synthesis of ATP. It is the main centre of oxidative phosphorylation. It is also a double membrane-bound organelle that contains a circular DNA. This DNA synthesizes protein required for the functioning of mitochondria.
d) Lysosome: Lysosomes are called the suicidal sacs of the cell. It contains lytic enzymes which break down or digest the dead and worn-out cells.
Thus, the correct answer is C.

Note: Other than mitochondria, chloroplasts also contain small circular DNA. The gene present in mitochondria codes for the enzymes needed for the synthesis of chemical energy. It is present in the mitochondrial matrix. This DNA is inherited from the mother.