Answer : Option CExplaination / Solution:
Several ribosomes may attach to a single mRNA and form a chain called polyribosomes or polysome. The ribosomes of a polysome translate the mRNA into proteins.
Answer : Option CExplaination / Solution:
The middle lamella is a layer mainly of calcium pectate which holds or glues the different neighbouring cells together.
Answer : Option DExplaination / Solution:
The cell wall and middle lamellae may be traversed by plasmodesmata which connect the cytoplasm of neighbouring cells by forming mitotic plates.
Q5.Who was the first to explain that cells divide?
Answer : Option CExplaination / Solution:
The German doctor Rudolf Virchow proposed in 1855 that all cells result from the division of previously existing cells, and this idea became a key piece of modern cell theory.
Q6.Which of the following statements with reference to cytoskeleton is not correct?
Answer : Option DExplaination / Solution:
The cytoskeleton in a cell is involved in functions like mechanical support, motility, maintenance of the shape of the cell.
Answer : Option AExplaination / Solution:
In plant cells, the chloroplasts are responsible for trapping light energy essential for photosynthesis. The grana, in the plastid, is the site of light reactions.