Observe the figures and answer the question.

Which of the following is not a constituent of bio-gas?

The density of population is decreased by the processes
(A) Natality
(B) Emigration
(C) Mortality
(D) Immigration
Choose the most appropriate combination from the options given below.

IUCN stands for:

Read the following and select the set of correct statements.
(A) Euchromatin is transcriptionally inactive
(B) Heterochromatin is more densely packed
(C) Heterochromatin is loosely packed
(D) Euchromatin is transcriptionally active
(E) Euchromatin stains lighter

Read the following passage carefully and answer the given questions.
The B-lymphocytes produce an army of proteins in response to pathogens. Each antibody molecule has four peptide chains, two small called light chains and two longer called heavy chains. Virus-infected cells secrete proteins called interferons which protect non-infected cells from further viral infection. Symptoms of allergic reactions include sneezing, watery eyes, running nose and difficulty in breathing. The use of drugs like anti-histamine, adrenalin and steroids quickly reduce the symptoms of allergy. Lymphoid organs are the organs where origin and/or maturation and proliferation of lymphocytes occur. The primary lymphoid organs are bone marrow and thymus. After maturation the lymphocytes migrate to secondary lymphoid organs like spleen, lymph nodes, tonsils, Peyer's patches of small intestine and appendix. Heroin commonly called smack is chemically diacetylmorphine which is a white, odourless, bitter crystalline compound. This is obtained by acetylation of morphine, which is extracted from the latex of poppy plant Papaver somniferum.
Which one of the following is not a feature of an antibody:

Roman numbers in the names of restriction enzymes indicate -

Match List - I with List - II.

List - I	List - II
(A) Down’s syndrome	(I) Inborn error of metabolism
(B) Klinefelter’s syndrome	(II) Absence of one of the X-chromosome
(C) Turner’s syndrome	(III) Presence of an additional copy of X-chromosome
(D) Phenylketonuria	(IV) Presence of an additional copy of chromosome number-21

Choose the correct answer from the options given below :

The magnetic flux linked to a coil changes from 10 \(\times 10^{-3}\) Wb to 6 \(\times 10^{-3}\) Wb in 0.01 s. The induced emf will be :

Two parallel beams of monochromatic light pass through a long slit of width 0.2 mm one by one. The angular divergence in which most of the light is diffracted for both the beams are \( 2.25 \times 10^{-3} \text{ rad} \) and \( 4.50 \times 10^{-3} \text{ rad} \) respectively. If the wavelength of the first beam is \( \lambda_1 = 3000 \text{ Å} \), then the wavelength of the second beam is:

Conversion of freshly prepared precipitate into the colloidal solution is known as

Arrange the following geological periods in latest to oldest duration of existence.
(A) Triassic
(B) Carboniferous
(C) Cretaceous
(D) Permian
Choose the correct answer from the options given below:

Which of the following differential equation represents the family of circles touching the \(x\)-axis at the origin?

If A is a square matrix of order 3, B = kA and |B| = x|A| then,