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Which structure is responsible for controlling the entry and exit of substances

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Question: Which structure is responsible for controlling the entry and exit of substances in a cell? (2022)

Options:

  1. Cell wall
  2. Plasma membrane
  3. Cytoplasm
  4. Nucleus

Correct Answer: Plasma membrane

Exam Year: 2022

Solution: 

The plasma membrane regulates the movement of substances in and out of the cell, maintaining homeostasis.

Which structure is responsible for controlling the entry and exit of substances

Practice Questions

Q1
Which structure is responsible for controlling the entry and exit of substances in a cell? (2022)
  1. Cell wall
  2. Plasma membrane
  3. Cytoplasm
  4. Nucleus

Questions & Step-by-Step Solutions

Which structure is responsible for controlling the entry and exit of substances in a cell? (2022)
  • Step 1: Understand that cells are the basic units of life.
  • Step 2: Know that cells need to take in nutrients and get rid of waste.
  • Step 3: Identify that there is a barrier around the cell called the plasma membrane.
  • Step 4: Learn that the plasma membrane controls what goes in and out of the cell.
  • Step 5: Recognize that this control helps keep the cell stable and healthy, a process called homeostasis.
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