The phenomenon where a single gene can have multiple phenotypic effects is known as:

A novel strategy to prevent infestation of roots of tobacco plant with the nematode Meloidegyne incognitia is :

We use microbes and microbially derived products almost every day. Bacteria called lactic acid bacteria (LAB) grow in milk to convert it into curd. The dough, which is used to make bread, is fermented by yeast called Saccharomyces cerevisiae. Microbes are used to produce industrial products like lactic acid, acetic acid and alcohol, which are used in a variety of processes in the industry. However, certain bacteria, which grow anaerobically on cellulosic material, produce large amount of methane along with CO2 and H2. These bacteria are collectively called methanogens, and one such common bacterium is Methanobacterium. These bacteria are commonly found in the anaerobic sludge during sewage treatment. Microbes are also used for commercial and industrial production of certain chemicals like organic acids, alcohols and enzymes.
Examples of acid producers are Aspergillus niger (a fungus) of citric acid. You are familiar with the commonly used antibiotic Penicillin. Do you know that Penicillin was the first antibiotic to be discovered, and it was a chance discovery? 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.
The discovery of penicillin was a chance discovery by Alexander Fleming while working on:

Read the passage carefully and give the answers to the question :
India was amongst the first countries in the world to initiate action plans and programmes at a national level to attain total reproductive health as a social goal.
These programmes called 'family planning' were initiated in 1951 and were periodically assessed over the past decades. Improved programmes covering wider reproduction-related areas are currently in operation. Creating awareness among the people about various reproduction-related aspects and providing facilities and support for building up a reproductively healthy society are the major tasks under these programmes.
Which of the following statements is incorrect with respect to Medical Termination of Pregnancy?

Read the given paragraph and answer the given question :
Parasitism has evolved in many taxonomic groups from plants to higher vertebrates. Many parasites have evolved to be host specific in such a way that both host and the parasite tend to co-evolve. In accordance with their life styles, parasite evolve special adaptations and complex life cycle.
Parasites harm the host by:

If in a forest there were 570 sambhars last year and through reproduction 30 new sambhars were added, taking the current population to 600.
Calculate the birth rate.

Which of the following statements are incorrect with respect to nucleotides ?
(A) Purines and pyrimidines are nitrogenous bases.
(B) Nucleotides and nucleosides are same.
(C) Phosphate group is linked to - OH of 5' C of a nucleoside through phosphoester linkage.
(D) In RNA, every nucleotide residue has an additional - OH group present at 3' position in the ribose.
(E) Thymine is an example of Pyrimidine.
Choose the correct answer from the options given below :

The Roquefort cheese are ripened by growing a specific_______ on them, which gives them a particular flavour.

Use of biocontrol measures greatly reduce our dependence on:

The capacitance of a capacitor becomes \(\frac{7}{6}\) times its original value if a dielectric slab of thickness \(t=\frac{2}{3} d\) is introduced between the plates, where \(d\) is the separation between the plates. The dielectric constant of the slab is:

Which of the following is a barrier method of contraception?

Arrange the given stages in spermatogenesis sequentially :
(A) Spermatid
(B) Primary spermatocytes
(C) Spermatogonia
(D) Secondary spermatocytes
Choose the correct answer from the options given below:

The similarities between sickle-cell anaemia and thalassemia are:
(A) Both are autosome linked recessive disease
(B) Both are blood related disorder
(C) Parents of the offsprings are carriers
(D) Both are controlled by same genes
Choose the correct answer from the options given below: