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Cell organelle which exhibit cart wheel ...

Cell organelle which exhibit cart wheel structure in transverse section, :-
(A) is helpful in cell division in almost all plant cells
(B) is not covered by any membrane
( C ) is a self duplicating unit
(D) contain microtubules composed of Dynien protein

A

A and C are incorreect

B

B and C are correct

C

Only A is incorrect

D

Only B is correct

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the cell organelle that exhibits a cartwheel structure in transverse section, we will analyze each of the provided statements about centrioles, which are the organelles in question. ### Step-by-Step Solution: 1. **Identify the Organelle**: The organelle that exhibits a cartwheel structure in transverse section is the centriole. Centrioles are cylindrical structures composed of microtubules. 2. **Analyze Each Statement**: - **Statement (A)**: "is helpful in cell division in almost all plant cells." - This statement is **incorrect**. Centrioles are primarily found in animal cells and are not present in most plant cells. Therefore, they do not assist in cell division in plant cells. - **Statement (B)**: "is not covered by any membrane." - This statement is **correct**. Centrioles do not have a surrounding membrane, which distinguishes them from many other organelles. - **Statement (C)**: "is a self-duplicating unit." - This statement is **correct**. Centrioles can duplicate themselves, especially during cell division, to form new centrioles. - **Statement (D)**: "contain microtubules composed of Dynien protein." - This statement is **incorrect**. The microtubules in centrioles are primarily composed of tubulin proteins, not dynein. Dynein is a motor protein that moves along microtubules, but it is not the structural component of centrioles. 3. **Conclusion**: Based on the analysis, the correct statements are (B) and (C). Therefore, the answer to the question is that the cell organelle which exhibits a cartwheel structure in transverse section is not covered by any membrane (B) and is a self-duplicating unit (C). ### Final Answer: The correct statements about the centriole are: - (B) is not covered by any membrane. - (C) is a self-duplicating unit.
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