Human Health and Disease — Page 4 | NEET Biology

Q31

Sarcoma is cancer of

A epithelial tissue

B mesodermal tissue

C blood

D endodermal tissues

Correct Answer

Option B

Solution

(b) Sarcoma is cancer of connective or supportive tissue (bone, cartilage, fat, muscle, blood vessels).

Q32

Hybridoma cells are

A nervous cells of frog

B hybrid cells resulting from myeloma cells

C only cells having oncogenes

D product of spore formation in bacteria

Correct Answer

Option B

Solution

(b) Hybridomas result from fusion of normal antibody-producing B-cells with myeloma cells.

Q33

Human immunodeficiency virus (HIV) has a protein coat and a genetic material which is

A single stranded DNA

B double stranded DNA

C single stranded RNA

D double stranded RNA

Correct Answer

Option C

Solution

(c) HIV's genome consists of single-stranded RNA associated with reverse transcriptase enzyme.

Q34

ELISA is used to detect viruses where the key reagent is

A RNase

B alkaline phosphatase

C catalase

D DNA probe

Correct Answer

Option B

Solution

(b) Alkaline phosphatase and peroxidase are the key enzymes used in ELISA.

Q35

Carcinoma refers to

A benign tumours of the connective tissue

B malignant tumours of the connective tissue

C malignant tumours of the skin or mucous membrane

D malignant tumours of the colon

Correct Answer

Option C

Solution

(c) Carcinomas are malignant growths of epithelial tissue covering or lining body organs.

Q36

Cancer cells are more easily damaged by radiation than normal cells because they are

A starved of mutation

B undergoing rapid division

C different in structure

D non-dividing

Correct Answer

Option B

Solution

(b) Rapidly dividing cancer cells are more susceptible to radiation damage.

Q37

ELISA is used to detect viruses, where

A DNA-probes are required

B Southern blotting is done

C Alkaline phosphatase is the key reagent

D Catalase is the key reagent

Correct Answer

Option C

Solution

(c) ELISA uses enzymes like alkaline phosphatase and peroxidase as key reagents.

Q38

Where will you look for the sporozoites of the malarial parasite?

A Saliva of infected female Anopheles mosquito

B Red blood cells of humans suffering from malaria

C Spleen of infected humans

D Salivary glands of freshly moulted female Anopheles mosquito

Correct Answer

Option A

Solution

(a) Sporozoites of malarial parasite are found in the saliva of infected female Anopheles mosquito.

Q39

Common cold differs from pneumonia in that:

A Pneumonia is a communicable disease whereas common cold is a viral infection.

B Pneumonia can be prevented by a live attenuated viral vaccine whereas common cold has no effective vaccine.

C Pneumonia is caused by a virus while common cold is caused by a bacterium.

D Pneumonia pathogen infects alveoli whereas common cold affects nose and respiratory passage but not the lungs.

Correct Answer

Option D

Solution

(d) Common cold (rhinovirus) affects nose/respiratory tract; Pneumonia (Streptococcus) infects alveoli.

Q40

Motile ookinete of Plasmodium occurs in:

A Gut of female Anopheles mosquito

B Salivary glands of Anopheles

C Human Red Blood Cells

D Human liver

Correct Answer

Option A

Solution

(a) Motile zygote (ookinete) of Plasmodium occurs in gut of female Anopheles after gamete fusion.