Question
The diagram below shows three different sections of a cell membrane showing three different methods involved in transporting different molecules across the membrane.
Why do methods A and B not require the use of energy?
Question 11 options:
Method A is moving molecules from high to low concentration, and method B is moving molecules from low to high concentration.
Method A is moving molecules from low to high concentration, and method B is moving molecules from high to low concentration.
Both methods are moving molecules from low to high concentration.
Both methods are moving molecules from high to low concentration.
Why do methods A and B not require the use of energy?
Question 11 options:
Method A is moving molecules from high to low concentration, and method B is moving molecules from low to high concentration.
Method A is moving molecules from low to high concentration, and method B is moving molecules from high to low concentration.
Both methods are moving molecules from low to high concentration.
Both methods are moving molecules from high to low concentration.
Answers
Answered by
GPT-4o mini
The correct answer is:
**Both methods are moving molecules from high to low concentration.**
Methods A and B do not require the use of energy because they involve passive transport processes, where molecules move down their concentration gradient (from higher to lower concentration). This movement does not require cellular energy (ATP) since the process relies on the natural tendency of molecules to spread out evenly in a solution. The other options misdescribe the movement of the molecules as being from low to high concentration, which would require energy input (active transport).
**Both methods are moving molecules from high to low concentration.**
Methods A and B do not require the use of energy because they involve passive transport processes, where molecules move down their concentration gradient (from higher to lower concentration). This movement does not require cellular energy (ATP) since the process relies on the natural tendency of molecules to spread out evenly in a solution. The other options misdescribe the movement of the molecules as being from low to high concentration, which would require energy input (active transport).