Given below are two statements :
Statement (I): Plasma membrane in bacteria is composed of double layer of phospholipid molecules.
Statement (II): Plasma membrane is the site of enzymes involved in energy production in bacteria.
In light of the above statements, choose the most appropriate answer from the options given below.
Statement (I): Plasma membrane in bacteria is composed of double layer of phospholipid molecules.
Statement (II): Plasma membrane is the site of enzymes involved in energy production in bacteria.
In light of the above statements, choose the most appropriate answer from the options given below.
Show Hint
- Both Statement (I) and Statement (II) are false.
- Both Statement (I) and Statement (II) are true.
- Statement (I) is true but Statement (II) is false.
- Statement (I) is false but Statement (II) is true.
The Correct Option is B
Solution and Explanation
The bacterial plasma membrane is a selectively permeable phospholipid bilayer that separates the cytoplasm from the external environment.
In prokaryotic cells, which lack membrane-bound organelles like mitochondria, the plasma membrane must perform many vital cellular processes.
Step 2: Detailed Explanation:
Let us analyze each statement:
- Statement (I): The plasma membrane of most bacteria is composed of a fluid phospholipid bilayer.
This bilayer is formed by amphipathic phospholipids with hydrophilic heads facing outwards and hydrophobic fatty acid tails facing inwards, matching the classic fluid mosaic model.
Thus, Statement (I) is true.
- Statement (II): Unlike eukaryotic cells, which utilize specialized mitochondrial membranes for cellular respiration, prokaryotic cells do not contain membrane-bound organelles.
Therefore, the bacterial plasma membrane serves as the site for the electron transport chain (ETC) and ATP synthase.
The enzymes, proton pumps, and electron carriers required for oxidative phosphorylation and ATP generation are located directly within this membrane.
Thus, Statement (II) is true.
Consequently, both statements are correct.
Step 3: Final Answer:
Both Statement (I) and Statement (II) are true, corresponding to option (B).
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