Textbook Question
Which of the following cannot pass through the membrane without the help of a membrane protein?a. carbon dioxide;b. water;c. oxygen;d. charged molecules
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2. Cell Chemistry & Cell Components
Active Transport
Back2. Cell Chemistry & Cell Components
Active Transport
- Multiple ChoiceWhich molecule is primarily used as an energy source in active transport?1views
- Multiple ChoiceThe sodium-potassium pump would be most active in cells of which of the following structures?
- Multiple ChoiceWhich of the following components of the cell membrane is responsible for active transport?1views
- Multiple Choice
Which of the following defines the type of transport by the sodium-potassium pump?
1views - Multiple ChoiceWhich of the following membrane proteins is involved in active transport?1views
- Textbook Question
Write a single sentence, using no more than 25 words, to summarize each of the following cellular processes:
Secondary active transport
1views - Multiple ChoiceWhich membrane transport process consumes ATP and uses a carrier protein?
- Multiple Choice
The force driving simple diffusion is ________, while the energy source for active transport is ________.
3views - Textbook QuestionSuppose a cell is placed in a solution with a high concentration of potassium and no sodium. How would the cellular sodium–potassium pump function in this environment?a. It would stop moving ions across the membrane.b. It would continue using ATP to pump sodium out of the cell and potassium into the cell.c. It would move sodium and potassium ions across the membrane, but no ATP would be used.d. It would reverse the direction of sodium and potassium ions to move them against their gradients.1views
- Multiple Choice
How are primary and secondary active transport related?
2views - Multiple ChoiceWhy does active transport of molecules across a membrane require ATP?
- Multiple ChoiceActive transport requires an input of energy and can also generate voltages across membranes. Based on this information, which of the following statements is true?3views
- Multiple Choice
A sodium-potassium pump ________.
3views - Multiple ChoiceWhich of the following correctly describes a general property of all electrogenic pumps?3views