Transport of Substances Into and Out of Cells (OCR A-Level Biology A): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
ShowHide
Practise the questions
10 questions from this quiz
Why does diffusion occur without requiring metabolic energy?
Why does diffusion occur without requiring metabolic energy?
Particles move randomly in all directions
What is the key difference between channel and carrier proteins in facilitated diffusion?
What is the key difference between channel and carrier proteins in facilitated diffusion?
Channels form pores; carriers change shape
Why do respiratory inhibitors like cyanide stop active transport?
Why do respiratory inhibitors like cyanide stop active transport?
They prevent ATP formation
Which two criteria must both be present for a process to be defined as osmosis?
Which two criteria must both be present for a process to be defined as osmosis?
Water molecules & partially permeable membrane
What is the water potential of pure water?
What is the water potential of pure water?
0 kPa
What happens to an animal cell placed in a hypotonic solution?
What happens to an animal cell placed in a hypotonic solution?
It swells and bursts (lysis)
What term describes a plant cell that has lost water in a hypertonic solution?
What term describes a plant cell that has lost water in a hypertonic solution?
Plasmolysed
A solution is hypotonic relative to a cell. What does this mean?
A solution is hypotonic relative to a cell. What does this mean?
Higher water potential than the cell
Which type of endocytosis involves taking in large particles such as bacteria?
Which type of endocytosis involves taking in large particles such as bacteria?
Phagocytosis
Why does exocytosis require ATP even though it doesn't work against a concentration gradient?
Why does exocytosis require ATP even though it doesn't work against a concentration gradient?
Membrane fusion & vesicle formation need energy