What is degraded by Peroxisomes?

Which of the following is not concerned with protein synthesis?

Which of the following cell organelles is described by the given statements?
$(a)$ Contains small tubules.
$(b)$ Is bounded by a membrane.
$(c)$ Contains enzymes.
$(d)$ Found in both plants and animals.

What does the vacuole create in a cell?

What are gas vacuoles? State their functions.

Give scientific reasons: Majority of fresh water organisms have contractile vacuoles while marine organisms lack them.