What is called movement of cell against concentration gradient ?
Correct answer: C. Active Transport
- A. Passive Transport
- B. Osmosis
- C. Active Transport
- D. Diffusion
Explanation
Active transport moves substances against their concentration gradient and requires energy, usually from ATP, through membrane transport proteins. Osmosis and diffusion are passive processes down a gradient, so students may choose diffusion when they focus on movement across a membrane without considering its direction.
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Animal and plant cells share a plasma membrane, cytoplasm, nucleus, ribosomes, mitochondria and endoplasmic reticulum, but plant cells also have a cellulose cell wall, chloroplasts and a large permanent vacuole. Questions cover organelle structure and function, differences between the two cell types, and how membranes control movement of substances.
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