Question

Pick up the correct statements.
1. Mitochondrion contains DNA.
2. 70 S ribosomes occur in prokaryotes.
3. Ribosomes are made up of phospholipids and oligosaccharides.
4. Ribosomes are not found in protista and monera.

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

Answer 1

Answer: (B)

1, 2 correct

• Mitochondria have evolved from specialized bacteria therefore, they have a membrane similar to bacteria and possess their own DNA.
  
• In prokaryotes, the ribosome present is a 70S type.
• Ribosomes are known as protein factories because they are the main site of protein synthesis which is present in almost all the cells (attached to nucleic acids, mitochondria, chloroplast and are freely present in the cytoplasm). They are composed of ribonucleic acids and proteins.
• All living organisms possess ribosomes.
• So, the correct answer is '1, 2 correct'.