Human Health and Disease — Page 14 | NEET Biology

Q131

Small proteins produced by vertebrate cells in response to viral infections inhibiting viral multiplication are known as

A Lipoproteins

B Immunoglobulins

C Interferons

D Antitoxins

Correct Answer

Option C

Solution

(c) Interferons are glycoproteins produced by virally infected cells that inhibit viral replication in adjacent cells.

Q132

Interferons are synthesized in response to

A Mycoplasma

B Bacteria

C Viruses

D Fungi

Correct Answer

Option C

Solution

(c) Interferons are virus-induced proteins produced by cells infected with a virus.

Q133

Short-lived immunity acquired from mother to foetus across placenta or through mother's milk is categorised as

A innate non-specific immunity

B active immunity

C passive immunity

D cellular immunity

Correct Answer

Option C

Solution

(c) Passive immunity is short-lived immunity acquired from an external source (mother).

Q134

Which of the following symptoms indicate radiation sickness?

A Red and ulcerated skin

B Nausea and loss of hair

C Nausea and anaemia

D Ulcerated skin, nausea, loss of hair and anaemia

Correct Answer

Option D

Solution

(d) Radiation sickness symptoms include ulcerated skin, nausea, loss of hair and anaemia.

Q135

Typhoid fever is caused by

A Salmonella

B Shigella

C Escherichia

D Giardia

Correct Answer

Option A

Solution

(a) Typhoid fever is caused by Salmonella typhi.