Question:
Which of the following is not the function of plasma membrane?
Which of the following is not the function of plasma membrane?
Show Hint
Plasma membrane = Boundary management (transport, secretion, communication, joining). Genetic processes (DNA/RNA synthesis) belong to the internal core (nucleus).
Updated On: Apr 28, 2026
- Endocytosis
- Formation of intercellular junctions
- Secretion
- DNA synthesis
Show Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept: The plasma membrane is a dynamic, semi-permeable lipid bilayer that acts as the boundary of the cell and mediates cellular interactions.
Step 2: Key Formula or Approach: Review the functional repertoire of the plasma membrane versus the internal organelles of a cell.
Step 3: Detailed Explanation: The plasma membrane serves several critical functions at the cell surface.
It facilitates the bulk intake of materials via vesicular invagination, known as Endocytosis (Option 1).
It contains specialized proteins that link adjacent cells together, resulting in the Formation of intercellular junctions like tight junctions and desmosomes (Option 2).
It is actively involved in exocytosis, which facilitates the Secretion of cellular products into the extracellular space (Option 3).
However, DNA synthesis (replication) is a highly regulated genetic process that occurs strictly within the intracellular compartment—specifically inside the nucleus in eukaryotes, or within the nucleoid region of the cytoplasm in prokaryotes. The plasma membrane is entirely uninvolved in the biochemical synthesis of DNA.
Step 4: Final Answer: DNA synthesis is not a function of the plasma membrane.
Step 2: Key Formula or Approach: Review the functional repertoire of the plasma membrane versus the internal organelles of a cell.
Step 3: Detailed Explanation: The plasma membrane serves several critical functions at the cell surface.
It facilitates the bulk intake of materials via vesicular invagination, known as Endocytosis (Option 1).
It contains specialized proteins that link adjacent cells together, resulting in the Formation of intercellular junctions like tight junctions and desmosomes (Option 2).
It is actively involved in exocytosis, which facilitates the Secretion of cellular products into the extracellular space (Option 3).
However, DNA synthesis (replication) is a highly regulated genetic process that occurs strictly within the intracellular compartment—specifically inside the nucleus in eukaryotes, or within the nucleoid region of the cytoplasm in prokaryotes. The plasma membrane is entirely uninvolved in the biochemical synthesis of DNA.
Step 4: Final Answer: DNA synthesis is not a function of the plasma membrane.
Was this answer helpful?
0
0
Top KCET Biology Questions
- Relate Column I with Column II with regard to predatory behaviour:
Column I Column II 1. Calotropis p. Invertebrates 2. Pisaster q. Distasteful 3. Monarch butterfly r. Cryptically colored 4. Frogs s. Cardioglycoside - Small mammals and birds are rarely found in polar regions. The reason is that
Match Column I and Column I
Column I Column II 1 Narrowly utilitarian argument p Conserving biodiversity for major ecosystem services 2 Broadly utilitarian argument q Every species has an intrinsic value and moral duty to pass our biological legacy in good order to future generation. 3 Ethical argument r Receiving benefits like food, medicine & industrial products. - Identify the correct statement/s about ex situ conservation. Advanced ex situ conservation includes i. Cryopreservation of gametes. ii. Plant tissue culture method. iii. Seed bank. iv. In vitro fertilisation.
- Identify the odd one out.
View More Questions
Top KCET Cell: the unit of life Questions
- An interconnecting membranous network of the cell composed of vesicles, flattened sacs and tubules is
- Match the pigments given in List I with their colour in chromatogram given in List II.Choose the correct answer from the options given below:
List I (Pigments) List II (Colour in chromatogram) 1 Chlorophyll 'b' p Yellow orange 2 Carotenoids q Orange red 3 Chlorophyll 'a' r Yellow 4 Xanthophylls s Blue green t Yellow green In the below diagram, identify the part which connects the peripheral microtubules to the central sheath.
Top KCET Questions
- Which of the following is not true for oxidation?
- If $a, b$ and $c \in N$ which one of the following is not true ?
- When $50\, cm ^{3}$ of $0.2\, N$ $H_{2} SO _{4}$ is mixed with $50 cm ^{3}$ of $1 N\, KOH$, the heat liberated is :
- If $a | (b + c)$ and $a| (b-c)$ where $a,b,c \in \, N $ then
- Which of the following is NOT a pair of functional isomers?
View More Questions