The second trophic level in an aquatic ecosystem is:

The technique of using live organisms or derived enzymes to produce products and processes useful to humans is known as:

Arrange the given structures involved in packaging of DNA Helix.
(A). Chromatin
(B). Chromatin fibers
(C). Nucleosome
(D). Euchromatin
Choose the correct answer from the options given below:

If an E.coli with heavy DNA (N15) is put in a medium with NH \(CI [ N 14]\) then, what type of DNA will be obtained after two generations/replications ?

Match List I with List II

LIST I	LIST II
A. Dominant trait of pod colour in garden pea	I. Polygenic traits
B. The physical association of two genes on a chromosome	II. Pleiotropy
C. The traits generally controlled by three or more genes	III. Yellow
D. When a single gene exhibit multiple phenotypic expression	IV. Linkage
	V. Green

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If the solar energy available to a particular ecosystem is 1,000,000 J. What will be the energy available at the 2nd trophic level in the food chain?

GnRH is secreted by:

The curve \(x=y^2\) and \(x y=k\) cut orthogonally, then \(k^2\) is equal to :

A bar magnet of magnetic moment 3 J/T lies aligned with the directions of a uniform magnetic field of 0.2 T. The amount of work, required so as to align its magnetic moment opposite to the field direction is :

Read the passage carefully and answer
Carbohydrates are essential for both plants and animals. Some common examples of carbohydrates are glucose, fructose, sucrose, glycogen, cellulose and starch. They form a major portion of our food. Honey has been used for a long time as an instant source of energy in Ayurvedic medicine. Carbohydrates are used as storage molecules in both plants and animals. The cell wall of bacteria and plants is made of cellulose. We use cellulose in the form of wood for making furniture and as cotton fiber for clothing. They also provide raw material for textiles,
paper, lacquers, and breweries. Carbohydrates are classified as Monosaccharides, Oligosaccharides and Polysaccharides on the basis of their behavior towards hydrolysis. Monosaccharides cannot be hydrolyzed further to simpler units whereas oligosaccharides can yield 2-10 units of monosaccharides on hydrolysis. Polysaccharides, which are non-sugars yield a large number of monosaccharide units on hydrolysis.
Answer the following questions about carbohydrates:
Hydrolytic products of maltose are?

Which of the following are correct?
(A) If \(a \equiv b(\bmod n)\), then \(-a \equiv-b(\bmod n)\)
(B) If \(a+b=c\), then \(a(\bmod n)+b(\bmod n) \equiv(a+b+c)(\bmod n)\)
(C) If \(a \equiv b(\bmod n)\), then \(k a \equiv k b(\bmod n), \forall k \in I\)
(D) If \(a \equiv b(\bmod n)\), then \((a+k) \equiv(b+k)(\bmod n), \forall k \in I\)
Choose the correct answer from the options given below :

Which one of the following takes place in all eukaryotic organisms as a method of cellular defense?

Ringworms is not caused by -