Which of the following structures are related to the male reproductive organ.
(A). Isthmus
(B). Sertoli cells
(C). Leydig cells
(D). Prostate
Choose the correct answer option given below.

Observe the diagram and answer the following questions:

Which enzyme can form DNA from RNA?

Which one of the following diseases is non-infectious?

Read the following paragraph and answer the given questions.
Repeated amplification is achieved by the use of a thermostable DNA polymerase (isolated from a bacterium, Thermus aquaticus), which remain active during the high temperature induced denaturation of double stranded DNA. The separated DNA fragments can be visualised only after staining the DNA with a compound known as ethidium bromide followed by exposure to UV radiation. The separated bands of DNA are cut out from the agarose gel and extracted from the gel piece. The convention for naming these enzymes is the first letter of the name comes from the genus and the second two letters come from the species of the prokaryotic cell from which they were isolated, e.g., EcoRI comes from Escherichia coli RY 13. In EcoRI, the letter 'R' is derived from the name of strain. Roman numbers following the names indicate the order in which the enzymes were isolated from that strain of bacteria. Stanley Cohen and Herbert Boyer accomplished this in 1972 by isolating the antibiotic resistance gene by cutting out a piece of DNA from a plasmid which was responsible for conferring antibiotic resistance. Since the DNA is enclosed within the membranes, we have to break the cell open to release DNA, RNA, protein, polysaccharides etc. The RNA can be removed by treatment with ribonuclease whereas proteins can be removed by treatment with protease. Other molecules can be removed by appropriate treatments and purified DNA ultimately precipitates out after the addition of chilled ethanol.

In agarose gel electrophoresis, the separated DNA fragments can be visualized with the help of compound known as:

Match List - I with List - II.

List - I	List - II
(A) Australian marsupials	(I) Homologous organs
(B) Wings of butterfly and wings of a bird	(II) Natural selection
(C) Industrial melanism	(III) Adaptive radiation
(D) Forelimbs of Horse and Bat	(IV) Analogous organs

Arrange the given steps involved in gel electrophoresis used for separation of DNA fragments?
(A) Exposure to UV light
(B) Staining with ethidium bromide
(C) Movement of DNA fragments towards anode
(D) Elution
Choose the correct answer from the options given below:

The process of evolution of different species in a given geographical area starting from a point and dispersing to other areas is called as:

\(\int e^x\left(\frac{1-x}{1+x^2}\right)^2\) dx is equal to :

A given p-n junction is forward biased. Which of the following statements is correct?

When aniline is reacted with benzoyl chloride, the correct product is

Neanderthal man had a brain size of :

A circular coil of area \( 300 \text{ cm}^2 \) and 25 turns rotates about its vertical diameter with an angular speed of \( 40 \text{ rad s}^{-1} \) in a uniform horizontal magnetic field of magnitude 0.05 T. The maximum voltage induced in the coil is

Which of the following facts are not true about GM crops ?
(A) They are more tolerant to abiotic stress (cold, drought, heat, salinity, etc.).
(B) They are pest-resistant.
(C) They cause early exhaustion of soil fertility.
(D) The food produced has decreased nutritional value.
Choose the correct answer from the options given below: