Which of the following characteristics is common to both chromosomes and ribosomes in eukaryotic cells?
I. They consist of nucleic acid.
II. They consist of protein.
III. They are in the nucleus.

I only

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II only

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III only

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I and II

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I and III

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Solution

The correct option is D I and II
Chromosomes are the thread-like structures having DNA and associated proteins and are present in the nucleus. Ribosomes are cytoplasmic organelles composed of ribosomal RNA (nucleic acid) and associated proteins. I and II are common to both chromosomes and ribosomes. Thus, the correct answer is D.

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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.

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Which of the following characteristics is common to both chromosomes and ribosomes in eukaryotic cells?I. They consist of nucleic acid.II. They consist of protein.III. They are in the nucleus.

Which of the following characteristics is common to both chromosomes and ribosomes in eukaryotic cells?
I. They consist of nucleic acid.
II. They consist of protein.
III. They are in the nucleus.