Question

Which of the following statements are correct:
(1) mitocondria contain DNA
(2) $70S$ ribosomes occur in prokaryote
(3) Ribosomes are made up of phospholipids and oligosaccharide
(4) ribosomes are not found in Protista and Monera

• A. 1,2 and 3 are correct.
• B. 1 and 2 are correct.
• C. 2 and 4 are correct.
• D. 1 and 3 are correct.

Answer 1

Answer: (B)

Mitochondria is also known as power house of the cell. The inner chamber or matrix of a mitochondria contains DNA, RNA, ribosomes, lipids granules and enzymes of Krebs cycle. DNA can be circular or linear, it is naked or without association with histones.
A prokaryotic cell is the one in which the genetic material is not organised into nucleus and all membrane bound organelles are absent so that there is single envelope system of organisation. $70S$ ribosomes occur in prokaryotic cell.