Percentage of intrinsic proteins in the totalproteins of plasma membrane -a)70%b)20%c)10%d)90%Correct answer is option 'A'. Can you explain this answer?

Question

Answer

The structure of semi-permiable plasma membrane shows lipid bilayer constituted with integral and peripheral proteins basing on ease of extraction, of which intrinsic proteins containing peculiar amino acid fragments constitute 70% and get buried in the membrane partially or completely for the transport of molecules

Answer

These protein are tightly binds with phospholipid.thus,they can't easily removed from membrane.(where as extrinsic protein superficially arranged on the surface of lipid layer and can be separated easily)

Answer

The percentage of intrinsic proteins in the total proteins of the plasma membrane is 70%.

1. Introduction
The plasma membrane is a vital component of all living cells, serving as a barrier between the cell and its external environment. It is composed of a phospholipid bilayer embedded with various proteins. These proteins can be classified into two categories: intrinsic proteins (integral proteins) and extrinsic proteins (peripheral proteins). Intrinsic proteins are firmly embedded within the phospholipid bilayer, while extrinsic proteins are loosely attached to the membrane.

2. Definition of Intrinsic Proteins
Intrinsic proteins, also known as integral proteins, are proteins that are embedded within the plasma membrane. They have hydrophobic regions that interact with the hydrophobic tails of the phospholipids, anchoring them within the membrane. Intrinsic proteins can span the entire width of the membrane (transmembrane proteins) or be partially embedded in the membrane (integral monotopic proteins).

3. Importance of Intrinsic Proteins
Intrinsic proteins play crucial roles in the plasma membrane. They are involved in various functions such as transport of molecules across the membrane, cell signaling, enzymatic activity, cell adhesion, and structural support. These proteins are essential for maintaining the integrity and functionality of the cell.

4. Percentage of Intrinsic Proteins in the Plasma Membrane
The percentage of intrinsic proteins in the total proteins of the plasma membrane is 70%. This means that out of all the proteins present in the plasma membrane, 70% of them are intrinsic proteins. The remaining 30% are extrinsic proteins that are loosely attached to the membrane.

5. Determining the Percentage
The percentage of intrinsic proteins in the plasma membrane can be determined through experimental techniques such as protein extraction and analysis. By isolating the proteins from the plasma membrane and quantifying them, the relative abundance of intrinsic proteins can be calculated.

6. Significance of the Percentage
The high percentage of intrinsic proteins in the plasma membrane highlights their importance in the overall function of the cell. Their presence and abundance reflect the need for these proteins to carry out essential cellular processes and maintain a stable internal environment.

In conclusion, the percentage of intrinsic proteins in the total proteins of the plasma membrane is 70%. These proteins are firmly embedded within the membrane and play crucial roles in various cellular processes. Understanding the composition of the plasma membrane is fundamental to studying cell biology and physiology.

Answer

For transport purpuses.
both active and passive.
as we know lyophillic substances cnnt be transported through lipid bilayer.
for this intrinsic protiens are.
they channels that are specific also.

hope u got it why.

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