What is a centromere? How does the position of centromere form the basis of
classification of chromosomes. Support your answer with a diagram showing
the position of centromere on different types of chromosomes.
Describe the structure of the following with the help of labelled diagrams.
(i) Nucleus (ii) Centrosome
Both lysosomes and vacuoles are endomembrane structures, yet they differ in
terms of their functions. Comment.
Name two cell-organelles that are double membrane bound. What are the
characteristics of these two organelles? State their functions and draw labelled
diagrams of both.
How do neutral solutes move across the plasma membrane? Can the polar
molecules also move across it in the same way? If not, then how are these
transported across the membrane?
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