Biotechnology - 2018 Past Year Paper - IIT JAM

Pyramid of energy in a forest ecosystem is

In the feedback regulation of an enzyme, the end product binds to the

What is the source of electrons in photosynthesis?

The value of lim 

Three vectors are as follows:

The value of is

The logic operation (OR, AND, NOR or NAND) carried out by following circuit is

The reaction of 1 1-cis-retinal with the lysine residue of a specific protein forms the light- sensitive pigment in the cells of retina. The light-sensitive pigment is an

Viral capsids are made up of morphological subunits called capsomeres. One of the common capsomeres is icosahedral. The icosahedron is a regular polyhedron with

Which of the following feature(s) should be present in a protein to generate strong immune response (antibody production) in an animal?
I. At least one B-cell epitope
II. At least one T-cell epitope
III. Proteolytic cleavage site(s)

Match the entries in Group I with that in Group II.

Proenzyme pepsinogen is secreted from 'P' of gastric mucosa and converted into active enzyme pepsin on exposure to ‘Q’ secreted from ‘R’. Choose the CORRECT combination of P, Q and R.​

When bacteria are grown in glucose-depleted media containing high concentration of lactose, expression of lac operon genes is activated by

Match the hormones in Group I with their functions in Group II

Match the entries in Group I with that in Group II

Match the entries in Group I with that in Group II

If and  then  is

The number of three letter words, with or without meaning, which can be formed using letters of the word ‘VIRUS’ without repetition of letters is

What is the solution of  In xdx ?
Given C is an arbitrary constant.

The area of an equilateral triangle with sides of length α is

Nucleus of a radioactive material can undergo beta decay with half life of 4 minutes. Suppose beta decay starts with 4096 nuclei at t = 0, the number of nuclei left after 20 minutes would be

Which one of the following shows the CORRECT relationship among velocity of light in a medium (v), permittivity of medium (ε) and magnetic permeability of medium (μ)?

A 30 μF capacitor is connected to a 240 V, 50 Hz source. If the frequency of the source is changed from 50 Hz to 200 Hz, the capacitive reactance of the capacitor will

Match the entries in Group I (Mechanical system) with analogous quantities in Group II (Electrical system)

The achiral molecules among the following (I, II, III and IV) are

Match the entries in Group I with those in Group II

Which one of the following statements is CORRECT?

In the ¹H NMR spectrum, which one of the following compounds will show a triplet?

Antibody binds to antigen in solution through

Plasmid mediated antibiotic resistances in bacteria are acquired by

Which of the following statements is/are CORRECT for G protein-coupled receptor (GPCR) mediated signaling?

Glucose is incubated with enzymes of glycolytic pathway (except pyruvate kinase), gamma ³²P-ATP and unlabeled inorganic phosphate. Which of the following products is/are formed?

In a double stranded DNA, which of the following ratios is/are always equal to 1?
A, T, G and C denote the number of bases.

Consider the equation x 3 — 1 = 0. If one of the solutions to this equation is 1, the other solution(s) is/are

Which of the following statements is/are CORRECT regarding self-inductance of a long solenoid having cross sectional area (A) , length (l) and having n turns per unit length filled with material o f relative permeability μr ?

If an optician prescribes a corrective lens of power -2 .0 D, the required lens

Which of the following statements is/are CORRECT?

Which of the following pairs of compounds can be distinguished by iodoform test performed in ammonium hydroxide?

The total number of genetically different types of gametes that will be produced by a heterozygous plant carrying the genotypes AABbCc is_________.

A healthy individual has the cardiac output of 5.5 L and heart rate of 72 beats per minute. The stroke volume o f the individual i s _________mL.

Both strands of a DNA molecule are labeled with radioactive thymidine and are allowed to duplicate in an environment containing non-radioactive thymidine. The number of DNA molecules that will contain radioactive thymidine after three duplications i s ________ .

The number of cycles required for complete degradation of Palmitic acid (16 Carbon) by β-oxidation i s __________.

The value of log_n 4^-16 is —32. The value of n is __________.

The determinant of the matrix 

The equivalent capacitance of following assembly o f capacitors is_________ μF.

The stability of the following carbocation arises from hyperconjugation with number of hydrogen atoms.

Oxidation state of Fe in the complex K₃[Fe(CN)₅NO] is (+) __________.

The mechanism of the following reaction involves the formation of a _____________membered ring.

The concentration of a purified enzyme is 10 mg/mL. Ten microlitres of the enzyme solution in a total reaction volume of 1 mL catalyses the formation of 20 nanomoles of product in one minute under optimum conditions. The specific activity of the enzyme is_________ unit/mg.

A 100 nucleotide-long single stranded poly-(A) is synthesized from adenosine monophosphate (AMP) at physiological pH. (Atomic mass o f C = 12 , H = l , 0 = 16 , P = 31 ;a t physiological pH, Molecular mass o f AMP = 345).
The molecular mass of the resulting poly-(A) at physiological pH is___________.

If a colour-blind woman marries a normal man, the chance that their boy child will be colour-blind is ________ %.

For a 0.1 M aqueous solution of lysine, the pH at which it carries no net charge is _______.
(pK_a values for: α-carboxylic group = 3.1, α-amino group = 8.0, ε-amino group = 10.8)

For a =________, the following simultaneous equations have an infinite number of solutions:
10x + 13 y = 6
ax + 32.5 y = 15

If A and B are events such that P( A) = 0.3, P (B ) = 0.2 and  = 0.45, the value of is___________.

An ultrasound signal of frequency 50 KHz is sent vertically down into a medium. The signal gets reflected from a depth of 25 mm and returns to source 0.00005 seconds after it is emitted. The wavelength of the ultrasound signal in that medium is________cm.

The relationship between the applied force F(X) (in Newton) on a body and its displacement X (in metre) is given below. The total amount of work done in moving the body from X = 0toX = 4 m i s ___________ Joule.

The number of axial C-H bond(s) in the major product (P) of the given reaction is ________.

A first order reaction is 87.5% complete at the end of 30 minutes. The half-life of the reaction is__________minute(s).