Home
Class 11
BIOLOGY
Infectious agent which is smaller than v...

Infectious agent which is smaller than virus and having no protein coat is

A

Virion

B

Viroids

C

Prions

D

Mycophages

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question "Infectious agent which is smaller than virus and having no protein coat is," we can follow these steps: ### Step-by-Step Solution: 1. **Understanding the Question**: The question asks for an infectious agent that is smaller than a virus and does not have a protein coat. 2. **Analyzing the Options**: - **Option 1: Variants**: Variants refer to different forms of viruses. They are complete virus particles that consist of a protein coat (capsid) and nucleic acid (either DNA or RNA). Therefore, this option is incorrect. - **Option 2: Viroids**: Viroids are indeed smaller than viruses and consist of a short strand of circular single-stranded RNA. They do not have a protein coat, making this option a potential correct answer. - **Option 3: Prions**: Prions are infectious agents that are misfolded proteins. They do not contain any genetic material, but they are not smaller than viruses in terms of infectious agents. Thus, this option is incorrect. - **Option 4: Mycophages**: Mycophages are viruses that infect fungi and, like other viruses, they have a protein coat. Therefore, this option is also incorrect. 3. **Conclusion**: After analyzing all the options, the only infectious agent that is smaller than a virus and lacks a protein coat is **Viroids**. ### Final Answer: The correct answer is **Viroids**. ---
Promotional Banner

Similar Questions

Explore conceptually related problems

Which are smaller than viruses ?

The infectious agent that is smaller to viruses and caused potato spindle tuber disease is

The following were the observations made for an infectious agent. (i) smaller than a virus, (ii) its nucleic acid had ribose as sugar (iii) lacks a Protein coat. Select the disease /s it is most likely to cause.

(A)It causes potato spindle tuber disease. (B) It is free RNA (C) Molecular weight of RNA is low (D) Infectious agent, smaller than viruses The above statements are assigned to :-

After extracting an organism, the scientist listed out the below features about it: (i) smaller than a virus, (ii) its nucleic acid had ribose as sugar , and (iii) lacks a protein coat . Which of the following diseases is likely to be produced by it?

Virus with uncheic acid but without protein coat is

Which is a an infectious disease