Answer:
The correct answer is C. Normal host cellular prion proteins (PrPC) are converted into scrapie proteins (PrPSc).
Explanation:
Prions are the infectious proteins that cause neurodegenerative diseases in both animals and humans. In humans, it causes various diseases like Creutzfeldt-Jakob disease, kuru. Collectively these diseases are called spongiform encephalopathies.
Humans contain normal cellular prion protein denoted as(PrPC) and the prions are abnormal form of this protein i.e., PrPSc where Sc indicates scrapie. This abnormal protein is misfolded form of normal prion protein.
When this misfolded prion protein enters the host body it converts all the normal cellular prion proteins in scrapie protein causing a fatal disease. In this disease, holes are created in the brain tissue and tissue degeneration gives brain appearance like sponges. Therefore the correct answer is C.
Answer:
In the knee joint attaching muscles to bones.
The ends of bones in a ball and socket joint.
Explanation:
Cartilage is a smooth tissue that is present at the ends of two long bones such as knee joint and ball and socket joint. This cartilage is very important because it protects bones from degradation during movement. Between the attachment of two bones, cartilage as well as oil is present in order to reduce friction during movement. So cartilage is very important between two long bones.
Answer:
d) a diploid fertilized ovum
Explanation:
a zygote is formed from the fusion of a female and a Male gamete
