The compartmentalization provided by membrane-bound organelles allows

Answer: Spatial separation of incompatible chemical reactions and concentration gradients Eg., lysosomes maintain acidic pH for hydrolytic enzymes; mitochondria maintain proton gradients; nucleus separates transcription from translation.

What is the BEST overall functional advantage of organellar compartmentalization?

Answer: It allows incompatible chemical environments and processes to coexist within a single cell Compartments isolate environments (pH, ions, enzymes) so that processes like protein degradation, oxidative phosphorylation, and DNA replication can occur in optimized conditions simultaneously.

AP Biology · Topic 2.10

Cell Compartmentalization Practice

Part of Cell Structure and Function.(ENE-1.J)

Practice questions

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Sample questions

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Sample 1difficulty 2/5
$The compartmentalization provided by membrane-bound organelles allows$
- A
  $More rapid assembly of ribosomal subunits in the cytosol of metabolically active cells$
- B
  $Storage of additional copies of nuclear DNA per cell within distinct organelle lumens$
- C
  $Spatial separation of incompatible chemical reactions and concentration gradients$
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- D
  $Faster fusion of secretory vesicles with the plasma membrane during regulated exocytosis$
Why
$Eg., lysosomes maintain acidic pH for hydrolytic enzymes; mitochondria maintain proton gradients; nucleus separates transcription from translation.$
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Sample 2difficulty 4/5
$Eukaryotic cells separate competing biochemical reactions into different organelles. For example, lysosomes contain acidic hydrolases at pH 5 while cytoplasm is near pH 7.2. Mitochondria establish a proton gradient inside their inner membrane to drive ATP synthesis.$
$What is the BEST overall functional advantage of organellar compartmentalization?$
- A
  $It guarantees that all reactions occur at the same pH and ion concentration$
- B
  $It allows incompatible chemical environments and processes to coexist within a single cell$
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- C
  $It limits the cell's ability to respond to changes in environment$
- D
  $It eliminates the need for any membrane transport proteins$
Why
$Compartments isolate environments (pH, ions, enzymes) so that processes like protein degradation, oxidative phosphorylation, and DNA replication can occur in optimized conditions simultaneously.$
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