Which of the following is used as a 'clot buster'?

Pollen grains are protected from high temperature and strong acids due to the presence of :

\((p+q)^2=p^2+2 p q+q^2=1\) represents Hardy Weinberg equation. It is used in:

The correct sequence of steps to obtain gene of interest from pool of DNA is:
(A) Cutting of DNA using restriction endonuclease.
(B) Viewing the ethidium bromide stained gel under UV light.
(C) Loading of DNA in wells.
(D) Cutting and extraction of DNA piece from gel.
(E) Separation of DNA fragments according to their molecular size.
Choose the correct answer from the options given below:

Match List-l with List-II

List-l (Scientists)	List-II (Discoveries)
(A) Frederick Griffith	(I) Genetic Code
(B) Francois Jacob and Jacque Monad	(II) Semi-conservative mode of DNA replication
(C) Har Gobind Khorana	(III) Transformation
(D) Meselson and Stahl	(IV) Lac operon

Choose the correct answer from the options given below:

Match List-l with List-ll

List-l (Enzymes)	List-II (Used for)
(A). Protease	(I). RNA
(B). Chitinase	(II). Protein
(C). Lysozyme	(III). Fungus
(D). Ribonuclease	(IV). Bacterial cell

Choose the correct answer from the options given below:

In gel electrophoresis, the natural polymer agarose gel used as medium is extracted from:

The point on the unit circle with center (0, 0); where tangents are equally inclined to the co-ordinate axes are:

The area of a triangle having the points \(A (1,1,1), B (1,2,3)\) and \(C (2,3,1)\) as its vertices is :

Question based on following passage :
Adsorption is the process of attracting and retaining the adsorbate molecules on the surface of adsorbent. It is of two types i.e. Physisrption and chemisorption. To increase the rate of reaction, the substance called 'catalyst' is added. Promotors enhance the activity of catalyst while poison decrease the catalyst activity. Solutions may be true solution, suspension and colloids. Colloids are heterogenous but quite stable. On the basis of nature of interaction, colloids may be Lyophilic or Lyophobic. On the basis of type of dispersed phase particles, there may be multimolecular colloids, macromlecular colloids and associated colloids. The congulation of colloids may be done by boiling, dialysis or by mixing oppositely charged sols.
The best coagulating agent for \(Fe(OH)_3\) solution is :

Aqueous \(CuSO _4\) solution gives green precipitate of \(( X )\) with aqueous KF.
Correct formula of X is:

\(s p^3\) hybridization leads to ______________

Read the passage carefully and answer the questions given along
Our immune system plays the major role in preventing diseases when we are exposed to disease-causing agents. Immunity is of two types: (i) Innate immunity and (ii) Acquired immunity. The human immune system consists of lymphoid organs, tissues, cells and soluble molecules like antibodies. The immune system also plays an important role in allergic reactions, auto-immune diseases and organ transplantation. The primary lymphoid organs are bone marrow and thymus. The secondary lymphoid organs are spleen, lymph nodes, tonsils, Peyer's patches of small intestine and appendix. There is lymphoid tissue also located within the lining of the major tracts (respiratory, digestive and urogenital tracts) called mucosa associated lymphoid tissue (MALT). It is important to note that HIV/AIDS is not spread by mere touch or physical contact; it spreads only through body fluids. AIDS has no cure, prevention is the best option. Adolescence is accompanied by several biological and behavioural changes and surveys and statistics show that use of drugs and alcohol has been on the rise especially among the youth. Factors associated with drug and alcohol abuse among adolescents are a child's natural curiosity, stress, the perception among youth that it is 'cool' or progressive to smoke, media exposure and an unstable or unsupportive family structures and peer pressure. It is best to identify the situations that may push an adolescent towards use of drugs or alcohol, and to take remedial measures well in time.
Mucosa associated lymphoid tissue is absent in the