Chapter Chosen

Human Health and Disease

Book Chosen

Biology

Subject Chosen

Biology

Book Store

Download books and chapters from book store.
Currently only available for.
CBSE Gujarat Board Haryana Board

Previous Year Papers

Download the PDF Question Papers Free for off line practice and view the Solutions online.
Currently only available for.
Class 10 Class 12

Infectionus proteins are present in

  • geminiviruses

  • prions

  • viroids

  • satellite viruses


B.

prions

Prions have a distinct extracellular from but the extracellular form is entirely protein. The prion particle does not contain any nucleic acid.However, it is infectious and prions are known to cause a variety of diseases in animals such scrapie in sheep, bovine spongiform encephalopathy in cattle (BSE or mad cow disease' ) chronic wasting disease in deer and elk and kuru and a form a Creutz Feldt- Jakob disease (CJD) in humans. No prion diseases of plants are known.

Prions have a distinct extracellular from but the extracellular form is entirely protein. The prion particle does not contain any nucleic acid.However, it is infectious and prions are known to cause a variety of diseases in animals such scrapie in sheep, bovine spongiform encephalopathy in cattle (BSE or mad cow disease' ) chronic wasting disease in deer and elk and kuru and a form a Creutz Feldt- Jakob disease (CJD) in humans. No prion diseases of plants are known.

298 Views

What is the significance of ‘Typhoid Mary’ ?

Typhoid Mary was a Typhoid carrier who continued to spread typhoid for several years through food she prepared.
616 Views

What is health ?

It is a state of complete, physical, mental and social well being of a person.
911 Views

Name three important aspects to maintain good health.

(i) Balanced diet (ii) Personal hygiene and (iii) Regular exercise.
741 Views

List advantages of good health.

Healthy people are more efficient and productive. good health also brings prosperity and people live long. It also reduces infant and maternal mortality.
588 Views

What is disease ?

Malfunctioning of one or more organs characterised by signs and symptoms is called disease.
563 Views