Which one of the following hormones is responsible for ovulation?

Select the correct statement/s from the following:
A. Spermatogonia always undergo meiotic cell division.
B. Primary spermatocytes divide by mitotic cell division.
C. Secondary spermatocytes have 23 chromosomes and undergo second meiotic division
D. Spermatozoa are transformed into spermatids.
Choose the correct answer from the options given below:

Which one of the following contributes the maximum percentage to the biodiversity of a vertebrate group?

Answer the questions from the figure given below:

Taq polymerase is the preferred DNA polymerase in PCR because :

Read the following passage carefully and answer the given questions.
Bioactive molecule, cyclosporin A, that is used as an immunosuppressive agent in organ-transplant patients, is produced by the fungus Trichoderma polysporum. Statins produced by the yeast Monascus purpureus have been commercialised as blood-cholesterol lowering agents. It acts by competitively inhibiting the enzyme responsible for synthesis of cholesterol. Baculoviruses are pathogens that attack insects and other arthropods. The majority of baculoviruses used as biological control agents are in the genus Nucleopolyhedrovirus. These viruses are excellent candidates for species-specific, narrow spectrum insecticidal applications. They have been shown to have no negative impacts on plants, mammals, birds, fish or even on non-target insects. BOD refers to the amount of the oxygen that would be consumed if all the organic matter in one liter of water were oxidised by bacteria. The sewage water is treated till the BOD is reduced. Cheese, is one of the oldest food items in which microbes were used. Different varieties of cheese are known by their characteristic texture, flavour and taste. For example, the large holes in ‘Swiss cheese’ are due to production of a large amount of CO₂ by a bacterium named Propionibacterium sharmanii.
Bioactive molecule, cyclosporin A, that is used as an immunosuppressive agent in organ-transplant patients, is produced by the fungus

The correct sequence of steps involved in polymerase chain reaction (PCR) are:
A. DNA polymerase is used to extends the primers using oligonucleotides.
B. Desired DNA fragments are denatured.
C. Amplified fragments are ligated with the vector for cloning.
D. Oligonucleotides are added
Choose the correct answer from the options given below:

Read the following paragraph and answer the given questions.
RNAi takes place in all eukaryotic organisms as a method of cellular defense. The source of this complementary RNA could be from an infection by viruses having RNA genomes or mobile genetic elements (transposons) that replicate via an RNA intermediate. Insulin from an animal source, though caused some patients to develop allergy or other types of reactions to the foreign protein. Insulin consists of two short polypeptide chains: chain A and chain B, that are linked together by disulphide bridges. Transgenic mice are being developed for use in testing the safety of vaccines before they are used on humans. Transgenic mice are being used to test the safety of the polio vaccine. If successful and found to be reliable, they could replace the use of monkeys to test the safety of batches of the vaccine. Specific Bt toxin genes were isolated from Bacillusthuringiensis} and incorporated into the several crop plants such as cotton. The choice of genes depends upon the crop and the targeted pest, as most Bt toxins are insect-group specific. The toxin is coded by a gene cryIAc named cry. There are a number of them, for example, the proteins encoded by the genes cryIAc and cryIIAb control the cotton bollworms, that of cryIAb controls corn borer.

The suitable example of mobile genetic elements is:

Match \(List - I\) with \(List - II\)

\(List - I\)	\(List - II\)
(A) \(\frac{d}{d x}\left(\sin x^2\right)\)	(I) \(\frac{1}{5}\)
(B) \(\frac{d}{d x}\left(e^{\sin x}\right)\)	(II) 0
(C) \(f(x)=\tan ^{-1} x\) then \(f^{\prime}(2)\)	(III) \(2 x \cos x^2\)
(D) If \(y=3 \cos x-2 \sin x\), then \(\frac{d^2 y}{d x^2}+y\)	(IV) \(e^{\sin x} \cos x\)

The probability distribution of a random variable \(X\) is given under :
\(
P(X=x)=\left\{\begin{array}{ll}
k x^2 & \text { for } x=1,2,3 \\
2 k x & \text { for } x=4,5,6 \\
0 & \text { for otherwise }
\end{array}\right.
\)
Then \(P(X \geq 4)\) is :

The radii of curvature of the faces of a double convex lens of focal length 12 cm made up of glass (\(\mu=1.5\)) are 10 cm and 'p' cm respectively. The value of p is :

What kind of behavior is shown in the Zwitter ionic form of amino acids?

Three charges, each equal to +q, are placed at the corners of an equilateral triangle ABC of side 'a' as shown in the figure. P and R are the mid-points of BC and CA. The work done in taking a charge Q from point P to R is:

With reference to the elimination reaction of alkyl halides, the correct statements are;
(A) Zaitsev rule predicts the major product in dehydrohalogenation reaction.
(B) Grignard's reagent is prepared under perfectly anhydrous conditions.
(C) Alkyl halides on reaction with aqueous KOH forms an eliminated product but with alcoholic KOH forms a substituted product.
(D) Alkyl halides on reaction with aqueous KOH forms a substituted product but with alcoholic KOH forms an eliminated product.
Choose the correct answer from the options given below: