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Ribosomes

Ribosomes are...

Question

Ribosomes are made up of RNA and

A

Sugar

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B

Protein

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C

DNA

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D

Cholesterol

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Solution

The correct option is B Protein
Ribosomes consist of two major components — the small ribosomal subunit which reads the RNA, and the large subunit which joins amino acids to form a polypeptide chain. Each subunit is composed of one or more ribosomal RNA (rRNA) molecules and a variety of proteins.

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Q. Ribosome are made up of ............. subunits.

Q. 80S ribosomes are made up of

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Q. 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.

Read the passage and answer the following question.

Ribosomes are the smallest cell organelles which can be seen only through an electron microscope. They are found in both prokaryotic as well as eukaryotic cells. Ribosomes are dense, round bodies which occur freely in the cytoplasm and may remain attached to the surface of the endoplasmic reticulum. Chemically, ribosomes are made up of ribonucleoprotein (in eukaryotic cells, the constituent of the ribosome is 40% protein and 60% ribosomal RNA). Ribosomes help in the process of protein synthesis. They are, therefore, called as the protein factories of the cell.

Ribosome is made up of

Q. Ribosomes are particles about 200

˚ A

units in diameter consisting of protein and RNA. The percentage of protein and RNA is respectively

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