Assertion – The quasi-fluid nature of lipid enables the lateral movement of proteins within the overall bilayer.Reason – This ability to move within the membrane is called fluidity and is important for cell growth.(a) Both Assertion and Reason are correct and Reason is the correct explanation for Assertion(b)Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion(c) Assertion is correct but Reason is incorrect(d) Both Assertion and Reason are incorrect

The correct answer is (a) Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

Explanation:

The assertion correctly states that the quasi-fluid nature of lipids in the cell membrane allows lateral movement of proteins within the lipid bilayer. This is a well-established property of cell membranes.
The reason also correctly explains that this ability to move within the membrane, known as fluidity, is indeed important for various cellular processes including cell growth. Fluidity allows for the dynamic interactions between proteins and lipids, facilitating cellular activities such as signaling, transport, and structural integrity.
Therefore, both the assertion and the reason are correct, and the reason provides a valid explanation for the assertion.