The Question is from neet-botany , and it was created by the author Mr. NARESH KUMAR K

Question

Certain infectious particles lack nucleic acids yet cause diseases. Which of the following correctly describes the infectious agent and a disease it causes?

Mr. NARESH KUMAR K · Accepted Answer

## CORE INFORMATION
✓ **Answer**: B
## CONCEPT FRAMEWORK
 **Primary Concept**: Infectious agents and their characteristics
 **Related Topics**: Virology, prion diseases, nucleic acids
 **Prerequisites**: Basic understanding of infectious diseases and the structure of infectious agents.
## SOLUTION PATHWAY
**Given Information**:
  The question states that certain infectious particles lack nucleic acids and cause diseases.
  We need to identify the infectious agent and the disease it causes from the given options.
**Method & Steps**:
 1. Analyze each option:
  Reasoning: We need to determine which infectious agent lacks nucleic acids and is known to cause the specified disease.
  Formula/Rule: None directly applicable.
 2. Evaluate options A, C, and D:
  Working: 
            * **A (Viroids; Potato spindle tuber disease):** Viroids are infectious agents composed of RNA, so they possess nucleic acids. 
            * **C (Viruses; Tobacco mosaic disease):** Viruses are infectious agents containing either DNA or RNA (nucleic acids). 
            * **D (Lichens; Athlete's foot):** Lichens are symbiotic organisms (fungi and algae), not infectious agents in the context of the question, and athlete's foot is caused by a fungus.
 3. Identify the correct option:
  Result: Option B, Prions; Creutzfeldt-Jakob disease, is the correct answer.
  Verification: Prions are infectious proteins that lack nucleic acids and are known to cause Creutzfeldt-Jakob disease and other transmissible spongiform encephalopathies.
 ## OPTION ANALYSIS
A :x: Viroids are RNA-based infectious agents and do cause potato spindle tuber disease, but they contain nucleic acid (RNA).
B ✓: Prions are infectious proteins that lack nucleic acids and are responsible for Creutzfeldt-Jakob disease.
 C :x: Viruses contain either DNA or RNA (nucleic acids) and cause various diseases, including tobacco mosaic disease.
D :x: Lichens are symbiotic organisms and are not related to athlete's foot, which is caused by fungi.
 ## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing prions with viroids or viruses: Remember that prions are unique in their lack of nucleic acids.
  2. Misunderstanding the nature of lichens: Lichens are not typically considered infectious agents in the context of human or plant diseases.
 **Quick Tips**:
  1.Focus on the key information: 'lack nucleic acids' and 'infectious agent'.
  2. Memorize the characteristics of prions and the diseases they cause.

Mr. NARESH KUMAR K · Answer

Viroids; Potato spindle tuber disease

Mr. NARESH KUMAR K · Answer

The correct Option is "Prions; Creutzfeldt-Jakob disease"

Mr. NARESH KUMAR K · Answer

Viruses; Tobacco mosaic disease

Mr. NARESH KUMAR K · Answer

Lichens; Athlete's foot

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