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CBSE->Plus 2 Biology Science Questions

Total Questions 190
for the compound (PtCl4)- how is charge determined?
how is dna fingerprinting carried out
what is the difference between a polaroid and a polariser?
does polarisation causes through refraction?
what is histone protiens?
evaluate integral of sec.sq(9-4x)dx
In Hydrogen atom, if the electron is replaced by a particle which is 200 times heavier but has the same charge, how would its radius change..?
Can rDNA technology used for introducing desirable characters into human body.? WHY..?
what is the difference between out breeding and out crossing?
how to write a letter of complaint?
LHS=1+2+3+...N-1=N(N-1)/2.=RHS....HOW ITS EQUAL?
please provide the procedure to do the project 'study of drug resistance of bacteria in milk using penicillin and amoxylin?
EXPLAIN ABOUT PEST RESISTANT PLANTS
HOW DO ANTIBIOTICS LIKE PENICILLIN AFFECT THE GROWTH OF BACTERIA IN MILK?
why Fe(oh)3 easily coagulated by Na3Po4?
WHY IS THE MAGNITUDE OFMAGNETIC FIELD OUTSIDE A SOLENOID TAKEN AS 0?
is it true that the blood when cutting the umlical chord the stem cells could be used to cure the future defect like autisism or heart problems etc. ?
show that a right triangle of a given hypotenuse has maximum area when it is an isosceles triangle?
show that of all rectangles of a given area the square has the smallest perimeter.
show that of all rectangles with a given perimeter the square has the largest area.