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Zorluk: OrtaCell Structure and Function

In both plant and animal cells, which structure functions as a selectively permeable barrier that regulates the entry and exit of nutrients, wastes, and other substances?

  1. A
    Cell wall
  2. Plasma membraneCevap
  3. C
    Chloroplast
  4. D
    Endoplasmic reticulum

Cevap

The plasma membrane (cell membrane) is the selectively permeable phospholipid bilayer that regulates transport into and out of both plant and animal cells.
The plasma membrane (or cell membrane) is composed of a phospholipid bilayer with embedded transport proteins. It is found in all living cells—both plant and animal—and functions as a selectively permeable barrier, strictly regulating the passage of ions, nutrients, and waste products to maintain cellular homeostasis.

Adım Adım Çözüm

1
Identify the structural and functional requirements specified in the question.
The target structure must be present in both plant and animal cells and function specifically to control the selective transport of materials.
Eliminating structures that are unique to plant cells or dedicated to internal metabolic tasks narrows the candidates to the outer regulatory boundary.
2
Evaluate the functional role of the plasma membrane compared to alternative cellular components.
The plasma membrane consists of a phospholipid bilayer with embedded transport proteins that selectively controls substance movement.
While plant cells also have a rigid outer cell wall, animal cells lack cell walls; only the plasma membrane is universally present across both cell types for selective permeability.

Anahtar Kavram

Selective permeability of the plasma membrane in eukaryotic cells
Tahmini Süre:45s
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Konular

Cell Structure and Function

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