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Under electron microscope the nucleosomes appear as beads on a string in chromosome, due to a short length of DNA wrapped around a core of histone proteins.

1. (a) Peptide synthesis takes place in ribosome of the cell.
2. (b) Golgi apparatus is the important site for formation of glycoprotein and glycolipid.
3. (c) Under electron microscope the nucleosomes appear as beads on a string in chromosome, due to a short length of DNA wrapped around a core of histone proteins.
4. (d) Peptide synthesis takes place in ribosome of the cell.

Correct answer: (c) Under electron microscope the nucleosomes appear as beads on a string in chromosome, due to a short length of DNA wrapped around a core of histone proteins.

Solution

Nucleosomes are the basic units of chromatin, made of a short DNA segment wrapped around a histone core. This arrangement gives chromosomes the “beads on a string” appearance under an electron microscope.

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