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NEET Biology Solved Question Paper 2005

Multiple Choice Questions

31.

Which one of the following pairs of geographical areas show maximum biodiversity in our country?

Sunderbans and Rann of Kutch
Eastern Ghats and West Bengal
Eastern Himalaya and Western Ghats
Kerala and Punjab

32.

Genetic diversity in agricultural crops is threatened by

introduction of high yielding varieties
intensive use of fertilizers
extensive intercropping
intensive use of biopesticides

33.

One of the ex situ conservation methods for endangered species is

wildlife sanctuaries
biosphere reserves
cryopreservation
national parks

34.

A young drug addict used to show symptoms of depressed brain activity, feeling of calmness, relaxation and drowsiness. Possibly he was taking

amphetamine
marijuna
pethidine
valium

35.

Antigen binding site in an antibody is found between

two light chains
two heavy chains
one heavy and one light chain
either between two light chains or between one heavy and one light chain depending upon the nature of antigen

36.

Which one of the following events is correctly matched with the time period in a normal menstrual cycle?

Release of egg: 5^th day
Endometrium regenerates: 5 - 10 days
Endometrium secretes nutrients for implantation : 11 - 18 days
Rise in progesterone level : 1 - 15 days

37.

A tumor inducing plasmid widely used in the production of transgenic plants is that of

Escherichia coli
Bacillus thuringiensis
Staphylococcus aureus
Agrobacterium tumefaciens

38.
Which one of the following statement pertaining to pollutants is correct?

DDT is a non-biodegradable pollutant

Excess fluoride in drinking water causes osteoporosis

Excess cadmium in drinking water causes black foot disease

Methylmercury in water may cause "Itai ltai" disease

DDT is a non-biodegradable pollutant

Pollutant are the agents that bring about an undesirable change in physical, chemical or biological characteristics of air,land, water and soil.

Non-biodegradable pollutant is a pollutant which retains its toxicity for extremely long periods of time. For eg, some lead and mercury compounds, chlorinated hydrocarbon pesticides such as DDT and radioactive substances are non- biodegradablc pollutants.

Osteoporosis is a condition that is characterized by a decrease in bone mass and density, causing bones to become fragile. Blackfoot disease (BFD) is a severe form of Peripheral Vascular Disease (PVD), in which the blood vessels in the lower limbs are severely damaged, resulting eventually in progressive gangrene. ltai-itai disease is a chronic cadmium poisoning with renal tubular dysfunction followed by osteomalacia.

39.

The "cri-du-chat" syndrome is caused by change in chromosome structure involving

deletion
duplication
inversion
translocation

40.

Grain colour in wheat is determined by three pairs of polygenes. Following the cross AABBCC (dark colour) x aabbcc (light colour), in F₂ generation what proportion of the progeny is likely to resemble either parent?