Question

Read the following four statements (A - D). (A) Colostrum is recommended for the new born because it is rich in antigens. (B) Chikungunya is caused by a Gram negative bacterium. (C) Tissue culture has proved usefiil in obtaining virus-free plants. (D) Beer is manufactured by distillation of fermented grape juice. How many of the above statements are wrong?

• A. Two
• B. Three
• C. Four
• D. One.

Answer 1

Answer: (B)

Three

Answer 2

Chikungunya is caused by Chikungunya virus. Colostrum is the first breast milk of mother which contains antibodies (especially IgA) which protect the infant by the age of three months. Beer is manufactured by fermentation of barley malt by yeast species. Tissue culture can be used to obtain virus-free healthy plants from diseased plants. Although the plant is infected with virus, the meristem (apical and axillary) is free of virus. This is because cells of meristematic region are actively dividing cells and virus cannot keep pace with these cells. Consequently their number is much low in meristematic region and sometimes they are completely absent here. Hence, meristem can be removed and grown in vitro to obtain virus-free plants.