The previous years question paper for IIT JAM examination is as follows:

Q. 1 Q.10 carry one mark each. Q.1 Which one of the following most accurately describes the process of natural selection? (A) Selection of one species over a competing species (B) Selection of individuals that successfully defend themselves against enemies (C) Selection of individuals that produce more than the average number of offspring (D) Selection of individuals that are more attractive to the opposite sex

Q.2 Identify the statement that is TRUE of operons. (A) Fine regulation of the expression of individual genes are made possible by operons (B) Only genes involved in carbohydrate metabolism are present in operons (C) Feedback inhibition of the biosynthesis of multiple enzymes by a single small molecule is made possible by operons (D) in the case of inducible operons, the inducer binds to the operator

Q.3 Signaling pathways usually comprise of several intermediate steps that are arranged in the form of a cascade. What is the primary outcome of such an arrangement? (A) Specificity of signal transduction (B) Specificity of the cellular response (C) Amplification of the cellular response (D) Fine-tuning of the cellular response

Q.4 Which among the following contain(s) oxygen-rich blood in the human vascular system? I. Right ventricle II. Aorta III. Pulmonary vein (A) I only (C) I, II and III
Q.5 Choose the option that lists the correct sequence of steps involved in gene therapy. P. Injection of expression vector into patient Q. Wild-type gene is inserted into expression vector R. Wild-type gene is isolated and cloned S. Wild-type gene is transcribed and translated in the patient (A) Q, S, P, R

Q.6 (B) I and II only (D) II and III only (B) Q, P, R, S (C) R, P, Q, S (D) R, Q, P, S Cephalin, a biological surfactant, is (A) choline phosphoglyceride (B) ethanolamine phosphoglyceride (C) glycosphingolipid (D) sphingolipid

Q.7 BIOTECHNOLOGY - BT The major product(s) produced by gas phase UV irradiation of 2-pentanone is (are) (A) acetone and ethene (B) acetic acid and propionic acid (C) 2-pentanol (D) cyclopentane

Q.8 If a projectile lifts off from the surface of the Earth with a speed of 11.2 km.s 1, then it can escape from the Earth s gravitational field completely. This is called the escape velocity. If the radius of the Earth were 2 times larger and the mass 8 times larger, then the escape velocity (in km.s 1) would be (A) 5.6

Q.9 (B) 11.2 (C) 22.4 (D) 44.8 The speed of an electron ( ), in the lowest energy orbit in the Bohr model of the Hydrogen atom divided by the speed of light in vacuum (c), is given by (where is the mass of the electron, is the mass of the proton, is the permittivity of free space, is the Bohr radius) (A) (B) (C) (D)

Q.10 Let be the set of all real numbers. Consider the sets P x x Q x x x and S x x y for some y Then the set P S Q contains (A) exactly two elements (C) exactly four elements x . , (B) exactly three elements (D) infinitely many elements Q. 11 Q. 30 carry two marks each.

Q.11 in a population growing according to the logistic growth model (A) individuals reproduce according to their physiological capacity (B) the per capita rate of increase approaches zero as the population nears the carrying capacity (C) the number of births is always more than the number of deaths (D) the birth-to-death ratio is NOT influenced by the carrying capacity

Q.12 Which part of the genomic DNA contains the sequence corresponding to the 5' untranslated region (5' UTR)? (A) Exon (C) Upstream of the transcription start site BT (B) Intron (D) Upstream of the promoter