Which type of population interaction is exhibited by 'mycorrhizae'?

Which of the following biofertilisers are free living in the soil?
(A) Anabaena
(B) Azospirillum
(C) Rhizobium
(D) Azotobacter
Choose the correct answer from the options given below :

The brain size of Neanderthal man was :

Observe the diagram and answer the following questions:

Which enzyme can form DNA from RNA?

In angiosperms during micorsporogenesis, meiosis occurs in:

Identify the incorrect statement about the human genome -

Read the Passage carefully and answer the the questions
Insulin consists of two short polypeptide chains : chain A and chain B, that are linked together by disulphide bridges. The first clinical gene therapy was given in 1990 to a 4-year old girl with adenosine deaminase (ADA) deficiency. This enzyme is crucial for the immune system to function. Recombinant DNA technology, Polymerase Chain Reaction (PCR) and Enzyme Linked Immuno-sorbent Assay (ELISA) are some of the techniques that serve the purpose of early diagnosis of diseases. Transgenic animals that produce useful biological products can be created by the introduction of the portion of DNA (or genes) which codes for a particular product such as human protein (α-1-antitrypsin) used to treat emphysema. Biopiracy is the term used to refer to the use of bio-resources by multinational companies and other organisations without proper authorisation from the countries and people concerned without compensatory payment.
In 1997, an American company got patent rights on Basmati rice through the US Patent and Trademark Office. This allowed the company to sell a ‘new’ variety of bvasnmati, in the US and abroad. This ‘new’ variety of Basmati had actually been derived from Indian farmer's varieties.. Indiian Basmati was crossed with semi-dwarf varieties and claimed as an invention or a novelty. This is a case of :

Match the coordination compounds given in List-l with the central metal atoms given in List-ll

List-I (Coordination compound)	List-II (Central metal atom)
(A) blood pigment	(I) iron
(B) chlorophyll	(II) magnesium
(C) vitamin B12	(III) rhodium
(D) wilkinson catalyst	(IV) cobalt

Choose the correct answer from the options given below:

Read the following paragraph carefully and answer the given questions.
In the year 1963 the two enzymes responsible for restricting the growth of bacteriophage in E. coli were isolated. The first restriction endonuclease - Hind II, whose functioning depended on a specific DNA nucleotide sequence was characterized five years later. It was found that Hind II always cut DNA molecules at a particular point by recognizing a specific sequence of six base pairs. This specific base sequence is known as the recognition sequence for Hind II. Besides Hind II, today we know more than 900 restriction enzymes that have been isolated from over 230 strains of bacteria, each of which recognize different recognition sequences.
Hind II is a restriction endonuclease because

A 15 cm wire carrying a current of 2 A is placed inside a current-carrying solenoid, perpendicular to its axis. The magnetic force acting on the wire is \( 20 \times 10^{-2} \text{ N} \). The magnetic field inside the solenoid is :

The correct statement(s) regarding the standard electrode potential, \(E^{\circ}\) are
(A) The standard electrode potential changes with the change in the concentration of electrolytes
(B) The standard electrode potential is always zero at 273 K
(C) The concentration of each ion in the solution is unity.
(D) All the gases involved are at 1 bar
Choose the correct answer from the options given below:

Which of the following compounds reacts with acids to give salts?

A DNA fragment contains 18% Thymine (T). The combined content of Cytosine (C) and Guanine in it would be: