Identify the primary lymphoid organs, where immature lymphocytes differentiate into antigen sensitive lymphocytes.
(A) Bone marrow
(B) Spleen
(C) Thymus
(D) Appendix
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Read the following paragraph carefully and answer the given questions.
In the year 1963 the two enzymes responsible for restricting the growth of bacteriophage in E. coli were isolated. The first restriction endonuclease - Hind II, whose functioning depended on a specific DNA nucleotide sequence was characterized five years later. It was found that Hind II always cut DNA molecules at a particular point by recognizing a specific sequence of six base pairs. This specific base sequence is known as the recognition sequence for Hind II. Besides Hind II, today we know more than 900 restriction enzymes that have been isolated from over 230 strains of bacteria, each of which recognize different recognition sequences.
In EcoR I the latter 'R' is derived from the -

Groups of individuals in a well-defined geographical area, sharing or competing for similar resources, having the potential to interbreed, are the characteristics of :

Statins are produced by:

Various types of skin colour in humans is an example of :

Which one of the following step is not involved in the genetic modification of an organism?

Development of fruits without fertilization is known as -

Match List-I with List-II

List-I (Reaction)	List-II (Name)
(A) \({CH}_3 {CHO}+{Dil} {NaOH} \longrightarrow {CH}_3 {CHOHCH}_2 {CHO}\)	(I) Aldol Reaction
(B) \({CH}_3 {CH}_3 {CH}_2 {COOH}+{Br}_2 \xrightarrow[\text { (ii) } {H}_2 {O}]{\text { (i)Red P }} {CH}_2 {CH}_2 {CHBrCOOH}\)	(II) Cannizzaro Reaction
(C) \({C}_6 {H}_5 {CHO}+\) Conc. \({KOH} \longrightarrow {C}_6 {H}_5 {COONa}+{C}_6 {H}_5 {CH}_2 {OH}\)	(III) Haloform Reaction
(D) \({CH}_3 {COCH}_3 \xrightarrow{{NaOCl}} {CH}_3 {COONa}+{CHCl}_3\)	(IV) Hell Volhard Zelinski Reaction

Choose the correct answer from the options given below:

The sum of order and degree of the differential equation \(\left(x^2 \frac{d^2 y}{d x^2}\right)^{\frac{3}{4}}=5\left(\frac{d y}{d x}\right)^2-3\) is equal to :

Select the statements which are true for oogenesis?
(A). Ovulation occurs at the secondary oocyte stage.
(B). Polar body is larger than the secondary oocyte.
(C). No more oogonia is formed after birth in the ovary.
(D). The sperm and the ovum nucleus fuse before the formation of the second polar body.
Choose the correct answer from the options given below:

Haemophilia is a

A transformer has 400 turns in the primary coil and 8000 turns in the secondary coil. It is connected to a 220 V main supply. The potential difference per turn in secondary coil is

Magnetic moment values for \(\left[ Fe \left( H _2 O \right)_6\right]^{3+}\) and \(\left[ Fe ( CN )_6\right]^{3-}\) are: