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Q.48 A metallic wire of electrical resistance 40 Ω is bent in the form of a square loop. The resistancebetween any two diagonally opposite corners is ________ Ω. A metallic […]

Q.47 The refractive index of a liquid relative to air is 1.5. Calculate the ratio of the real depth to theapparent depth when the liquid is taken in a beaker. […]

Q.46 Proinsulin is an 84 residue polypeptide with six cysteines. How many different disulfidecombinations are possible? Proinsulin with six cysteines can form 15 different disulfide combinations. This calculation arises from the […]

Q.45 Heterozygous female fruit flies with gray body and purple eyes were mated with homozygous males with black body and red eyes. The number of offspring obtained and their phenotypes […]

Q.44 Let N be the set of natural numbers and f: N↦N be defined by f(x) = { x/2, if x even 3x+1, if x odd } Let fn(x) denote […]

Q.43 Let XYZ be an equilateral triangle and let P, Q, R be the mid points of YZ, XZ, and XY, respectively. Let r = Area(∆PQR)Area(∆XYZ). The value of r […]

Q.42 A 0.1% (w/v) solution of a protein absorbs 20% of the incident light. What fraction of light istransmitted if the concentration is increased to 0.4%? [Correct to two decimal […]

Q.41 C3 plants utilize 18 molecules of ATP to synthesize one molecule of glucose from CO 2 . How manymolecules of ATP equivalents are used by C 4 plants to […]

Q.40 The reaction of (R)-2-bromobutane with CN proceeds by ________.(A) retention of configuration(B) inversion of configuration(C) formation of CH2 =CH(CH2 CH3 )(D) formation of (S)-2-methylbutanenitrile The reaction of (R)-2-bromobutane with […]

Q.39 BF 3 reacts readily with ________.(A) C5 H5 N (B) SnCl 2(C) SO3 (D) (C5 H5 N)SnCl 2 BF3 reacts readily with pyridine (C5H5N), forming a stable Lewis acid-base […]