Read the following statements and select the correct option.Statement ...
Bacterial plasma membrane or plasmalemma has a structure similar to that of a typical membrane. It is made of a phospholipid bilayer with proteins of various types (extrinsic, integral, transmembrane). Archaebacteria are a group of most primitive prokaryotes which are able te survive in extremely hostile conditions. Their cell membranes are different from eubacteria and are characterized by the presence of a monolayer of branched chain lipids.
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Read the following statements and select the correct option.Statement ...
Explanation:
Statement 1: Almost all bacteria possess lipoproteinaceous plasma membrane.
Statement 2: The plasma membrane of archaebacteria as well as eubacteria have the same type of lipids.
Correct answer: c) Statement 1 is correct and statement 2 is incorrect.
Explanation:
Let's analyze each statement individually:
Statement 1: Almost all bacteria possess lipoproteinaceous plasma membrane.
This statement is correct. The plasma membrane is a vital component of bacterial cells and is composed of a lipid bilayer embedded with proteins. The lipids present in the plasma membrane of bacteria are mainly phospholipids, which are amphipathic molecules with a hydrophilic head and a hydrophobic tail. The proteins in the membrane help in various functions like transport, signaling, and structural support.
Statement 2: The plasma membrane of archaebacteria as well as eubacteria have the same type of lipids.
This statement is incorrect. Archaebacteria, also known as archaea, are a distinct group of microorganisms that have different characteristics compared to eubacteria (true bacteria). One of the major differences between archaebacteria and eubacteria is the composition of their plasma membranes. Archaebacterial plasma membranes are composed of unique lipids called isoprenoid lipids or ether lipids, whereas eubacterial plasma membranes are composed of phospholipids with fatty acid ester linkages.
Therefore, statement 1 is correct as almost all bacteria possess lipoproteinaceous plasma membranes. However, statement 2 is incorrect as the plasma membranes of archaebacteria and eubacteria have different types of lipids.
Read the following statements and select the correct option.Statement ...
Why c is the answer why not a
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