EVERYDAY SCIENCE

Detailed explanation-1: -The mitochondrial DNA and plastid DNA possess genes which produce the proteins necessary for the functioning of mitochondria and plastids respectively due to the presence of ribosomes. They can self-replicate and form more copies of them. Therefore, they are called as semi-autonomous organelles.

Detailed explanation-2: -Mitochondria and chloroplasts are called semi-autonomous organelles because they have their own DNA, mRNA, tRNA, ribosomes and they replicate by binary fission so they are said to be self governing.

Detailed explanation-3: -Chloroplast is called as a semi-autonomous organelle because they have their own DNA and this DNA codes for some proteins used by the chloroplast. Q.

Detailed explanation-4: -The plastid is a semi-autonomous, self-reproducing organelle. Plastids are remnants of a photosynthetic organism that was engulfed by the host, although not all are now photosynthetic. Plastid genomes encode genes for rRNAs, tRNAs and between about 28 and 150 proteins.

Detailed explanation-5: -Explanation : Mitochondria and chloroplasts are semi-autonomous cell organelles containing their own DNA and protein-synthesizing machinery. They arise from pre-existing organelles and their functions are partially controlled by the cell’s nucleus and the organelles themselves.