Question

by which method does the following move into the cell: molecules moving against the concentration gradient? answer options: diffusion, active transport mechanisms, phagocytosis, receptor - mediated endocytosis, osmosis, i dont know yet

Explanation:

To determine the correct answer, we analyze each option:

• Diffusion: Molecules move down the concentration gradient (from high to low concentration), so this is incorrect.
• Active transport mechanisms: This process requires energy (e.g., ATP) to move molecules against the concentration gradient (from low to high concentration), which matches the description in the question.
• Phagocytosis: A type of endocytosis where cells engulf large particles, not specifically for moving molecules against the concentration gradient.
• Receptor - mediated endocytosis: Involves the uptake of specific molecules via receptors, not related to moving against the concentration gradient in the general sense of this question.
• Osmosis: The movement of water across a semi - permeable membrane down its concentration gradient (or along the solute concentration gradient), not for moving molecules against their concentration gradient.

Answer:

B. Active transport mechanisms