The given diagram shows the structure of the cell membrane.Which of the labelled components, if removed from the cell membrane, will limit the movement of large and charged particles across the cell membrane?
Correct answer: D. Z
- A. W
- B. X
- C. Y
- D. Z
Explanation
The correct answer is Option D: ZProteins embedded in the cell membrane, such as channel and carrier proteins, are crucial for transporting large and charged particles across the membrane. These proteins facilitate the movement of substances that cannot easily pass through the lipid bilayer due to their size or charge. Options A, B, and C refer to components that do not primarily regulate this specific type of transport.
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Animal and plant cells share a plasma membrane, cytoplasm, nucleus, ribosomes, mitochondria and endoplasmic reticulum, but plant cells also have a cellulose cell wall, chloroplasts and a large permanent vacuole. Questions cover organelle structure and function, differences between the two cell types, and how membranes control movement of substances.
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