Question

Match the organelle/organism and type of ribosomes.

Organelle / organism	Ribosome
(A) Chloroplast	(p) 70S
(B) Fungal mitochondria	(q) 80S
(C) Eukaryotic cell	(r) 55S
(D) Mammalian mitochondria	(s) 77S

• A. A-p, B-r, C-q, D-s
• B. A-p, B-s, C-q, D-r
• C. A-q, B-r, C-p, D-s
• D. A-s, B-r, C-p, D-q

Answer 1

The correct option is B A-p, B-s, C-q, D-r

There are broadly two types of cells : prokaryotic cell and eukaryotic cell. The prokaryotic cells do not have well defined nucleus and membrane bound organelles whereas eukaryotic cells have a well defined nucleus and membrane bound cell organelles. Ribosomes are found in both prokaryotic and eukaryotic cells. Ribosomes are the enzymatic machines on which protein synthesis occurs. Eukaryotic ribosomes have sedimentation coefficient 80S whereas prokaryotic ribosomes have sedimentation coefficient 70S. The eukaryotic organelle (chloroplast) ribosomes resemble prokaryotic ribosomes and are of 70S type. Mitochondria present in eukaryotes have 55S ribosomes. Fungal mitochondria has 77S ribosomes.

So, the correct answer is 'A-p, B-s, C-q, D-r'