Created by StemPy LabChemical studies show that the membrane of a human erythrocyte has about 52 per cent protein and 40 per cent lipid. Which statement about the cell membrane is correct?
← All Quizzes
← Two statements about the nucleus are given below.
Statement I: The nucleolus is bounded by a membrane, so its content is kept apart from the rest of the nucleoplasm.
Statement II: Some mature cells have no nucleus, for example the erythrocytes of many mammals and the sieve tube cells of vascular plants.Assertion (A): Water crosses the plasma membrane by active transport, from a lower to a higher concentration of water. Reason (R): Active transport uses ATP to move ions or molecules against their concentration gradient, as in the Na⁺/K⁺ pump. →
Discussion (0)
Log in to join the discussion.
Loading…