Transport Across Cell Membranes (AQA A-Level Biology): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
In which direction does active transport move substances across membranes?
In which direction does active transport move substances across membranes?
From low to high concentration
What is the energy source required for active transport?
What is the energy source required for active transport?
ATP
What proteins are involved in active transport?
What proteins are involved in active transport?
Carrier proteins
What does ATP split into during active transport?
What does ATP split into during active transport?
ADP and phosphate
Does co-transport directly use ATP?
Does co-transport directly use ATP?
No, it uses existing gradients
In the sodium-potassium pump, how many ions move out?
In the sodium-potassium pump, how many ions move out?
3
What is a key energy difference between active transport and facilitated diffusion?
What is a key energy difference between active transport and facilitated diffusion?
Active needs ATP; facilitated doesn't
Why do cells performing lots of active transport have many mitochondria?
Why do cells performing lots of active transport have many mitochondria?
To provide ATP
What is the key distinction of active transport compared to passive processes?
What is the key distinction of active transport compared to passive processes?
Works against gradient
What percentage of ATP can active transport consume in some cells?
What percentage of ATP can active transport consume in some cells?
Up to 40%