Question

Which of the following ribosomes are engaged in protein synthesis in animal cell?

• A. ribosomes which occur on nuclear membrane and E.R.
• B. ribosomes of only cytosol
• C. ribosomes of only nucleolus and cytosol
• D. ribosomes of only mitochondria and cytosol.

Answer 1

Answer: (A)

Ribosomes present in nuclear membrane and endoplasmic reticulum take part in protein synthesis. Two or more ribosomes simultaneously engaged in protein synthesis on the same wRNA strand forming polyribosomes. The ribosome functions as a template, bringing together different components required for protein synthesis.