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NEET Biology Solved Question Paper 2003

Multiple Choice Questions

41.

In human the inheritance of sex linkage takes place through :

autosomes
Y - chromosome
X- chromosome
both 'b' and 'c'

42.

Hybridoma technology is used to :

kill the cancer cells
formation of somaclonal antibodies
formation of somatic hybrids
formation of antibiotics

43.

Yeast is used in the production of :

acetic acid
citric acid
ethyl alcohol
curd

44.

The vaccine of Hepatitis-B is a :

first generation vaccine
interferon
second generation vaccine
third generation vaccine

45.

The term 'ecosystem' was coined by :

E.P. Odum
A.G. Tansley
Carl Mobious
W. Clementus

46.

Streptomycin was isolated first time by :

A. Flemming
Robert Koch
N. Borlaug
S. Waksman

47.
Which of the following micro-organism is used for conversion of milk into curd?

Xanthomonas citri

Bacillus megatherium

Acetobacter aceti

None of the above

None of the above

Streptococcus lactis, S. cremoris, S. thermophilus, Lactobacillus lactis and L. bulgaricus are the micro- organisms responsible for the conversion of milk into curd. These produce lactic acid from lactose, lower the pH to 4.6 and leads to coagulation of milk.

Xanthomonas citri causes citrus canker disease in citrus.

Bacillus megatherium is used in flavouring of tobacco and tea leaves.