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Question

Many ribosomes associate with a single mRNA to form multiple copies of a polypeptide simultaneously. This string of ribosomes are termed as

A
centrosome
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B
polyhedral bodies
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C
polysome
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D
nucleosome
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Solution

The correct option is C polysome
During protein synthesis ribosomes associate with single strand of mRNA. This complex of 2 or more ribosomes with mRNA is called polysome. Polyribosome are formed when a number of copies of the same polypeptide are required.

A centrosome is an organelle containing two cylindrical structures called centrioles. The centrosome is where all the microtubules of the cell that form the cytoskeleton are organized.

Polyhedral bodies are bodies present in some bacteria. They contain the enzyme ribulose-1,5-bisphosphate carboxylase/oxygenase which is a very important enzyme for carbon fixation.

Nucleosomes are a chain of similar subunits of chromatin fibre. Each nucleosome consists of an octomer of eight histone units wrapped by a DNA strand. They are present only in eukaryotes.

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