Question

The site of protein synthesis in plants is :-
A. Chloroplast
B. Ribosomes
C. Lysosomes
D. Mitochondria

Answer 1

1. The process of synthesis of protein from mRNA within the cell is known as translation.
2. The process of translation is completed by ribosomes in the cell.

Complete step-by-step answer:
1. Chloroplast is a subdivision of plastids. It contains mainly chlorophyll and carotenoid pigment which are essential for trapping sunlight which is an energy source for photosynthesis. The green colour of leaves is due to chloroplast. It also has its own DNA and ribosomes.
2. Ribosomes are granular structures which are composed of ribonucleic acid and protein. It consists of two subunits. The upper small unit read the mRNA coding where as the large unit combined the amino acids in series. In this way they form a chain of amino acids which further call protein.
3. Lysosomes are also known as the suicidal bags of the cell. Lysosomes consist of hydrolytic enzymes which break the structure of carbohydrates, fats, protein at a specific ph. It also destroys the infected cells.
4. Mitochondria is known as a powerhouse of cells. It’s main function is to provide energy to the cell to complete it’s all function on time and in a proper manner.
Hence we have seen that the protein synthesis takes place in Ribosomes.

So, the correct answer is “Option B Ribosomes”.

Note:
1. Mitochondria and chloroplast both are double membrane bound cell organelles whereas ribosomes are not surrounded by any membrane.
2. The number of ribosomes in a cell depends on the utilization and need of the protein by the cell.