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he diagram below represents the results of the movement of a specific type of molecule across a living cell membrane.Which of the following BEST describes how this molecule is moving?

Question 8 options:

The molecule is moving with its concentration gradient and does not use ATP.

The molecule is moving with its concentration gradient and would require ATP.

The molecule is moving against its concentration gradient and does not use ATP.

The molecule is moving against its concentration gradient and would require ATP.

1 answer

To accurately determine how the molecule is moving, we need to consider the concepts of concentration gradients and ATP usage.

  1. With its concentration gradient: This means the molecule is moving from an area of higher concentration to an area of lower concentration. This process usually does not require energy (ATP) and is known as passive transport.

  2. Against its concentration gradient: This means the molecule is moving from an area of lower concentration to an area of higher concentration. This process typically requires energy (ATP) and is known as active transport.

Without the actual diagram, it’s impossible to definitively say how the molecule is moving; however, if it is moving from an area of low concentration to high concentration, it would require ATP. If it's moving from high to low concentration, it would not require ATP.

Given the options and understanding these principles, you can choose the answer that fits the information you have regarding the movement of the molecule:

  • If the movement is from high concentration to low concentration: "The molecule is moving with its concentration gradient and does not use ATP."
  • If the movement is from low concentration to high concentration: "The molecule is moving against its concentration gradient and would require ATP."

Choose the option that corresponds to the specific details in your diagram.