Read the following passage carefully and answer the given questions.
Immune System in the Body
The human immune system consists of lymphoid organs, tissues, cells and soluble molecules like antibodies. The primary lymphoid organs are bone marrow and thymus where immature lymphocytes differentiate into antigen-sensitive lymphocytes. After maturation the lymphocytes migrate to secondary lymphoid organs like spleen, lymph nodes, tonsils, Peyer's patches of small intestine and appendix. The secondary lymphoid organs provide the sites for interaction of lymphocytes with the antigen, which then proliferate to become effector cells. The bone marrow is the main lymphoid organ where all blood cells including lymphocytes are produced. Each antibody molecule has four peptide chains, two small called light chains and two longer called heavy chains. Hence, an antibody is represented as H2L2. Different types of antibodies are produced in our body. IgA, IgM, IgE, IgG are some of them. Techniques like radiography (use of X-rays), CT (computed tomography) and MRI (magnetic resonance imaging) are very useful to detect cancers of the internal organs.
An antibody is represented as -

Match List - I with List - II.

LIST I	LIST II
(A) Ribosome	(I) Replication
(B) Histone	(II) Transcription
(C) DNA polymerase	(III) Translation
(D) RNA polymerase	(IV) Nucleosome

Choose the correct answer from the options given below :

Analogous structures are formed as a result of :

Insulin used in earlier times caused some patients to develop allergies because
(A). It was extracted from the pancreas of slaughtered cattle.
(B). It was a foreign protein for the body of the patient.
(C). It was a foreign lipid molecule for the body of the patient
(D). It consists of two polynucleotide chains held together by disulphide bridges
Choose the correct answer from the options given below:

Match List I with List II

List I (Drug)	List ll (Plant)
(A) Morphine	(I) Tobacco
(B) Cannabinoids	(II) Erythroxylum coca
(C) Cocaine	(III) Papaver somniferum
(D) Nicotine	(IV) Cannabis sativa

Choose the correct answer from the options given below:

Which disease is caused by filarial worm, that leads to chronic inflammation?

Identify the incorrect fact about genetic modification.

If \(A\) is any square matrix of order 3 and \(B=\left[\begin{array}{ccc}\sin \theta & \cos \theta & 0 \\ -\cos \theta & \sin \theta & 0 \\ 0 & 0 & a\end{array}\right]\), \(a\) is any constant, then \(|A B|\) is equal to:

If 50000 J energy available to primary producer, then energy available to tertiary consumer will be:

The set of value of \(x\) for which the angle between the \(\vec{a}=2 x^2 \hat{i}+4 x \hat{j}+\hat{k}\) and \(\vec{b}=7 \hat{i}-2 \hat{j}+x \hat{k}\) is obtuse is :

Microbes in human welfare Microbes are a very important component of life on earth. we use microbes and microbially derived products almost every day, like LAB to make curd, yeast to make bread, adding flavor and texture to cheese, producing antibiotics etc. The addition of LAB, improves the milk quality by increasing vit. B12. Cheese is one of the oldest food items in which microbes are used. For example, large holes in Swiss cheese are due to CO2 produced by the bacterium Propionibacterium sharmanii. The BOD test measures the rate of uptake of oxygen by microorganisms in a sample of water and thus, indirectly, BOD is a measure of the organic matter present in the water. The greater the BOD of waste water, the more is its polluting potential. In anaerobic sludge digesters, bacteria produce a mixture of gases like methane, hydrogen sulphide and carbon dioxide. These gases form biogas and can be used as a source of energy. Biofertilisers are organisms that enrich the nutrient quality of the soil. The main sources of biofertilisers are bacteria, fungi and cyanobacteria. You have studied about the nodules on the roots of leguminous plants formed by the symbiotic association of Rhizobium. These bacteria fix atmospheric nitrogen into organic forms, which is used by the plant as a nutrient. Other bacteria can fix atmospheric nitrogen while free-living in the soil (examples Azospirillum and Azotobacter).
Identify, the free living bacteria in soil, which can fix the atmospheric nitrogen.

Royal records were engraved on 'tamra-patra' in ancient times. 'Tamra patra' here means

If 525 = (10 + K) (mod 7) where \(K \in N\), then the least value of K is: