Transport proteins located in the cytoplasmic membrane are necessary when
A) diffusion will not allow adequate amounts of a substance to enter the cell.
B) movement into the cell is against a concentration gradient.
C) the level of nutrients in nature is very low.
D) nutrient concentration is very low in the environment, is higher inside of the cell, or diffusion is not possible.

Question

Quizplus · Accepted Answer

Transport proteins located in the cytoplasmic membrane are necessary when nutrient concentration is very low in the environment, is higher inside of the cell, or diffusion is not possible. These proteins aid in the movement of substances into the cell against the concentration gradient, ensuring adequate levels of nutrients within the cell.

Transport Proteins Located in the Cytoplasmic Membrane Are Necessary When