Prions

Q. The size of Pleuro Pneumonia Like Organisms (PPLO) is:

1. $0.02\mu m$
2. $1-2\mu m$
3. $10-20\mu m$
4. $0.1\mu m$

Q. Which of the following is NOT characteristic of bacterial cells?

1. Bacterial cells are prokaryotes.
2. Bacterial cells do not have an organized nucleus.
3. Bacterial cells do not have cell wall
4. Bacterial cells have a ring of double-stranded of DNA.

Q. Which among the following is correct?

A.	Viroids	Infectious free RNA	Potato spindle tuber disease
B.	Prions	Infectious proteins	Mad cow disease
C.	Viruses	Nucleo proteins	Mumps
D.	Lichens	Algae + Fungi	Indicators of CO pollution

1. A, B, D
2. Only A, C
3. A, B, C, D
4. A, B, C

Q. Kuru disease is caused by the same infectious agent that causes

1. potato spindle tuber disease
2. bovine spongiform encephalopathy
3. AIDS
4. Influenza

Q.

Do Prions have genetic material?

Q. How many diseases given here are caused by prions?
Bovine spongiform encephalopathy (BSE), Creutzfeldt Jakob Disease (CJD), Potato spindle tuber disease, Common cold, Rabies

1. Five
2. Four
3. Three
4. Two

Q.

Who First Discovered Viroids?

Q. Virus contains both type of nucleic acids, i.e., DNA and RNA.

1. True
2. False

Q. The causative agent of mad-cow disease is a

1. bacterium
2. prion
3. worm
4. virus

Q. Creutzfeldt–Jakob disease (CJD) is a disorder in humans caused by misfolded proteins that affects the

1. brain
2. heart
3. lungs
4. kidneys

Q. Composition of viroids and prions

Q. Bovine spongiform encephalopathy is a disease caused by prion in a______?

1. cow
2. potato
3. sheep
4. man

Q.

What is a Peroxisomal Disorder?

Q.

Are prions living?

Q.

There is a rare illness called mad cow disease. It is also called as bovine spongiform encephalopathy (BSE). This disease affects cows nervous system causing a cow to act strangely. According to scientists, a person is at higher risk of getting a human form of the disease, CJD (Creutzfeldt-Jakob disease), when he/she eats BSE-infected meat. You have studied various disease-causing agents. Which agent do you think is responsible for this rare disease for which there is no treatment yet?

Q. Prions

1. have ss RNA
2. cause diseases only in humans
3. are larger than viruses
4. are abnormally folded proteins

Q.

Mention a disease caused by a prion.

Q. Nucleic acid is absent in __________.

1. Virus
2. Viroid
3. Prion
4. Mycoplasma

Q. What are prions ?

1. They are not pathogens
2. They are animal friendly
3. They are pathogens with no nucleic acid
4. None of the above

Q. Protein infectious particles better known as 'Prions' are also called as

1. Incomplete virus
2. Slow virus
3. Satellite virus
4. Gemini viruses

Q. Which of the following is not associated with virus?

1. Their genetic material may be DNA or RNA
2. The virus may replicate in a eukaryotic host
3. The virus may replicate autonomously in the absence of a host
4. The virus may replicate in a bacterial host
5. The protein coat of the virus does not enter a host bacterial cell

Q. Which of the following is not true for viruses?

1. Double stranded DNA
2. Double stranded RNA
3. Both DNA and RNA
4. Single stranded DNA

Q. Amici (1818) studied cyclosis for the first time in

1. HydriIla
2. Amoeba
3. Chara
4. Acetabularia.

Q. Proteinaceous infectious particles causing diseases are

1. Prions
2. Viruses
3. Viroids
4. Chlamydia

Q. Assertion :Nucleic acid complexes alone cannot cause diseases. Reason: Only nucleoproteins can function as infectious agents.

1. both assertion and reason are true and reason is the correct explanation of assertion.
2. both assertion and reason are true but reason is not the correct explanation of assertion.
3. assertion is true but reason is false.
4. both assertion and reason are false

Q. Which is not a mental disorder?

1. Epilepsy
2. Neurosis
3. Gout
4. Psychosis

Q. Select the correctly matched pair.

1. Beet curly top virus - ssDNA
2. Gemini Virus - ssDNA
3. Maize streak disease virus - ssDNA
4. All of the above

Q. Which among the following is correct?

A.	Viroids	Infectious free RNA	Potato spindle tuber disease
B.	Prions	Infectious proteins	Mad cow disease
C.	Viruses	Nucleo proteins	Mumps
D.	Lichens	Algae + Fungi	Indicators of CO pollution

1. Only A, C
2. A, B, C
3. A, B, C, D
4. A, B, D

Q. what is the function of plasmid in bacteria ??

Q. Spongiform encephalopathy is caused by

1. Prion
2. E. coli
3. Fungus
4. Virus