First slide

Eukaryotic Cells

Question

Read the following statements.
A: ${Na}^{+}$ / $K^{+}$ pump participates in active transport.
B: Lateral movement of proteins is possible within the overall lipid bilayer.

Easy

A

A and B both are correct
B

A and B both are incorrect
C

A is correct but B is incorrect
D

A is incorrect but B is correct

Solution

${Na}^{+}$ / $K^{+}$ pump transports a few ions or molecules across the membrane against their concentration gradient, i.e., from lower to the higher concentration. Such a transport is an energy dependent process, in which ATP is utilized and is called active transport.
According to fluid mosaic model, the quasi-fluid nature of lipid enables lateral movement of proteins within the overall bilayer. This ability to move within the membrane is measured as its fluidity.

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