Which was the first discovered antibiotic ?

Recombinant DNA is directly injected into the nucleus of an animal cell.
This method is known as-

If sewage water is added to river water, it will:

Read the following passage carefully and answer the given questions
The separated DNA fragments can be visualized only after staining the DNA with ethidium bromide followed by exposure to UV radiation. Bright orange colored bands of DNA in ethidium bromide stained gel exposed to UV light can be seen. The separated bands of DNA are cut out from the agarose gel and extracted from the gel piece. This step is known as elution. The DNA fragments purified in this way are used in constructing recombinant DNA by joining them with a cloning vector.
The extraction of separated bands of DNA from the gel piece is called:

Which one of the following diseases can be treated by human protein (a -1- antitrypsin) produced by transgenic animals?

Which one of the following statements is incorrect about ecological pyramids?

DNA fingerprinting techniques have the following steps. Arrange these
steps in the correct order.
(A) Digestion by restriction enzyme
(B) Transferring separated DNA fragments
(C) DNA-DNA hybridization
(D) Gel Electrophoresis
Choose the correct answer from the options given below:

Among the following statements on the nitration of aromatic compounds, the false one is:

Match List-l with List-ll

List-l (Terms related to RNA)	List-II (Features)
(A). Capping	(I). Transcribes rRNAs
(B). Polyadenylation	(II). Removal of introns
(C). RNA polymerase I	(III). 5' end-methyl guanosine triphosphate addition
(D). Splicing	(IV). Addition of 200-300 adenylate residues

Choose the correct answer from the options given below:

The area bounded by the curve \(x = |y|\) and the line \(x = 2\) is:

Read the following paragraph and answer the given questions.
Cancer detection is based on biopsy and histopathological studies. 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. Do you know why mother's milk is considered very essential for the new-born infant? The yellowish fluid colostrum secreted by mother during the initial days of lactation has abundant antibodies (IgA) to protect the infant. 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. The exaggerated response of the immune system to certain antigens present in the environment is called allergy. The use of drugs like anti-histamine, adrenalin and steroids quickly reduce the symptoms of allergy. Drugs like barbiturates, amphetamines, benzodiazepines, and other similar drugs, that are normally used as medicines to help patients cope with mental illnesses like depression and insomnia, are often abused. Morphine is a very effective sedative and painkiller, and is very useful in patients who have undergone surgery.
A pregnant female is advised not to discard the yellowish fluid called colostrum, secreted during the initial days of lactation, because it is rich in:

The cell wall of a bacteria can be removed by treated it with enzyme:

Two lenses of focal lengths, 20 cm and - 25 cm, respectively are placed in contact with each other. The power of the combination of lenses is