Which of the following can be used by females as injections or implants under the skin for birth control.
(A) Oxytocin
(B) Follicle Stimulating Hormone (FSH)
(C) Progestogens alone
(D) Progestogen-estrogen combinations
Choose the correct answer from the options given below:

Some strains of Bacillus thuringiensis produce toxic proteins that do not kill:

Match List I with List II

List I	List ll
(A) Down's syndrome	(I) 44 + XX/XY
(B) Klinefelter's syndrome	(II) 44 + XO
(C) Turner's syndrome	(III) 44 + XXY
(D) Normal human	(IV) 45 + XX/XY

Choose the correct answer from the options given below:

Where are IUDs placed in the human female reproductive sytem for contraception?

Read the following passage carefully and answer the given questions.
Restriction endonuclease on finding its specific recognition sequence, bind to the DNA and cut each of the two strands of the double helix at specific points in their sugar -phosphate backbones. Each restriction endonuclease recognises a specific palindromic nucleotide sequences in the DNA. Since the DNA is enclosed within the membranes, we have to break the cell open to release DNA along with other macromolecules such as RNA, proteins, polysaccharides and also lipids. This can be achieved by treating the bacterial cells/plant or animal tissue with enzymes such as lysozyme (bacteria), cellulase (plant cells), chitinase (fungus). Now a days the most commonly used matrix is agarose which is a natural polymer extracted from sea weeds. The DNA fragments separate (resolve) according to their size through sieving effect provided by the agarose gel. The first restriction endonuclease-Hind II, whose functioning depended on a specific DNA nucleotide sequence was isolated and characterised five years later. It was found that Hind II always cut DNA molecules at a particular point by recognising a specific sequence of six base pairs. In addition to 'ori', the vector requires a selectable marker, which helps in identifying and eliminating non-transformants and selectively permitting the growth of the transformants. Transformation is a procedure through which a piece of DNA is introduced in a host bacterium. Normally, the genes encoding resistance to antibiotics such as ampicillin, chloramphenicol, tetracycline or kanamycin, etc., are considered useful selectable markers for E. coli.
A natural polymer extracted from sea weeds used in the field of biotechnology is:

Which of the following is not a natural method of contraception?

Chromosomal theory of inheritance was given by:

The area (in square units) of the region bounded by the curve \(x^2=y\) and the straight line \(y=4\) in the first quadrant is equal to

The particular solution of the differential equation \(e^x \sqrt{1-y^2} d x+\frac{y}{x} d y=0\), given that \(y=1\), when \(x=0\), is:

In the following reaction
\(\text{aX} \rightarrow \text{bY}\)
\(\text{log}_{10}\text{(-}\frac{\text{dx}}{\text{dt}}\text{)} = \text{log}_{10}\text{(}\frac{\text{dy}}{\text{dt}}\text{)} + 0.4771\)
X and Y, respectively can be
[Given: log 3 = 0.4771]

If matrix \(A=\left[\begin{array}{ll}3 & x \\ y & 0\end{array}\right]\) and \(A^{\prime}=A\), then :

In the extraction of metallic Zn from calamine ore \(\left( ZnCO _3\right)\) following steps are involved :
(A) Distillation of impure Zn
(B) Calcination of the ore
(C) Hydraulic washing of ore
(D) Reduction of ZnO using coke
Choose the correct order of steps from the options given below :

The direction cosines of the line
\(x-y+z-5=0\) and \(x-3 y-6=0\) are: