Question

1. Identify the picture given below and name the tool under which it was viewed.   [1]
   
2. What do the dark spots represent in the picture? Explain how and why are they formed.   [2]

Answer 1

1. The given picture represents a polysome (polyribosome) structure. The image was viewed under an electron microscope.
2. The image's dark patches stand in for ribosomes. Polysomes are made up of ribosomes that form a chain along the messenger RNA (mRNA) strand.
   Formation and Function: In order to synthesise proteins during translation, ribosomes bind to the mRNA. The efficiency of protein synthesis is increased by this configuration, which enables several ribosomes to translate the mRNA at once.