Match List-l with List-II

List-l (Genes of lac Operon)	List-II (Codes for)
(A) i	(I) \( \beta \)-galactosidase
(B) z	(II) Transacetylase
(C) a	(III) Permease
(D) y	(IV) Repressor

Choose the correct answer from the options given below:

Identify the correct options with respect to the salient features of DNA.
(A) The two polynucleotide chains are coiled in a left-handed fashion
(B) Adenine forms three hydrogen bonds with thymine
(C) The distance between a base pair in a DNA helix is approximately 0.34 nm
(D) The plane of one base pair stacks over the other in double helix
Choose the correct answer from the options given below:

For the protection from herbivore animals, the plant Calotropis secretes the highly poisonous compound known as -

Read the following paragraph carefully and answer the given questions.
Certain types of leukocytes (WBC) of our body like polymorpho-nuclear leukocytes (PMNL-neutrophils) and monocytes and natural killer (type of lymphocytes) in the blood as well as macrophages in tissues can phagocytose and destroy microbes. For determining the cause of allergy, the patient is exposed to or injected with very small doses of possible allergens, and the reactions studied. The use of drugs like anti-histamine, adrenalin and steroids quickly reduce the symptoms of allergy. Heroin, commonly called smack is chemically diacetylmorphine which is a white, odourless, bitter crystalline compound. This is obtained by acetylation of morphine. 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. Different species of Plasmodium (P. vivax, P. malaria and P. falciparum) are responsible for different types of malaria. Of these, malignant malaria caused by Plasmodium falciparum is the most serious one and can even be fatal.
Which one of the following is not the cellular barrier of innate immunity?

Identify the mammals which live wholly in water:
A. Dolphins
B. Seals
C. Sea Horse
D. Sea cow
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Arrange the following in the order of their occurrance.
(A) Spermatids are transformed into spermatozoa
(B) Spermatogonia are multiplied by mitotic division
(C) Sperms are released from seminiferous tubules by the process of
spermiation
(D) Sperm heads are embedded in sertoli cells
Choose the correct answer from the options given below:

Copper ions released by CuTs plays a role in contraception by
A. Increasing phagocytosis of sperms
B. Suppressing fertilizing capacity of sperms
C. Inhibiting ovulation
D. Suppressing the motility of sperms
Choose the correct answer from the options given below:

A die is tossed 6 times and getting 1 or 5 is considered a success.
The probability of getting at least one success in six tosses is:

Which statement is correct for solutions?

Genetically modified crops have advantages over normal crops as they are:
(A) More tolerant to cold, drought, salt and heat
(B) Less efficient in mineral usage
(C) Less reliant on chemical pesticides
(D) Nutritionally enriched
Choose the correct answer from the options given below :

If \(A=\left[\begin{array}{ccc}2 & -3 & 4 \\ -3 & 5 & x \\ 4 & 3 & 0\end{array}\right]\) is a symmetric matrix and \(B=\left[\begin{array}{ccc}0 & 2 & -10 \\ -2 & z & 6 \\ y & -6 & 0\end{array}\right]\) is a skew-symmetric matrix, then the value of \((x y+y z+z x)\), is:

The role of ethidium bromide in gel electrophoresis is:

What will be the product formed when crude metal of Zirconium is heated in an evacuated vessel with iodine?