Fungi are also known to form symbiotic associations with plants. This is known as-

Read the passage and answer the question given below.
When a host is exposed to antigens, which may be in the form of living or dead microbes or other proteins, antibodies are produced in the host body. This type of immunity is called active immunity. Active immunity is slow and takes time to give its full effective response. Injecting the microbes deliberately during immunisation or infectious organisms gaining access into body during natural infection induce active immunity. When antibodies are directly given to protect the body against foreign agents, it is called passive immunity.
Production of antibodies against antigens in the body is:

The traits which are controlled by more than one gene are known as:

Which one of the followings is not a feature of insecticidal protein crystals formed by Bacillus thuringiensis: -

Read the following passage carefully and answer the given questions.
Immune System in the Body
The human immune system consists of lymphoid organs, tissues, cells and soluble molecules like antibodies. The primary lymphoid organs are bone marrow and thymus where immature lymphocytes differentiate into antigen-sensitive lymphocytes. After maturation the lymphocytes migrate to secondary lymphoid organs like spleen, lymph nodes, tonsils, Peyer's patches of small intestine and appendix. The secondary lymphoid organs provide the sites for interaction of lymphocytes with the antigen, which then proliferate to become effector cells. The bone marrow is the main lymphoid organ where all blood cells including lymphocytes are produced. Each antibody molecule has four peptide chains, two small called light chains and two longer called heavy chains. Hence, an antibody is represented as H2L2. Different types of antibodies are produced in our body. IgA, IgM, IgE, IgG are some of them. 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.
The site of interaction of lymphocytes with antigen is

The complimentary DNA sequence of the DNA strand 5'-GAATTC-3' would be:

Which is known as 'Terror of Bengal'.?

Two wires with resistances \( R_1 \) and \( R_2 \) are stretched n times their original length. After stretching, the two wires are connected in parallel. The equivalent resistance of the combination will be:

The correct IUPAC name of the following compound is

A current of 5 A is passing through a metallic wire of cross-sectional area \( 5 \times 10^{-6} \text{ m}^2 \).
If the density of the charge carriers in the wire is \( 5 \times 10^{26} \text{ m}^{-3} \), the drift velocity of the electrons is:

Match List-l with List-II

List-l (Compound Name)	List-II (Boiling Point)
(A) \(CH_3CH_2OH\)	(I) 373K
(B) \(CH_3OCH_3\)	(II) 348K
(C) \(H_2O\)	(III) 351K
(D) \(CH_3CH_2OCH_2CH_3\)	(IV) 248K

Choose the correct answer from the options given below :

A semiconductor has an electron concentration of \( 8 \times 10^{13} \text{ m}^{-3} \) and hole concentration of \( 2 \times 10^3 \text{ m}^{-3} \). The semiconductor behaves as:

Read the Passage carefully and answer the Questions:
Kinetic studies not only help us to determine the rate of a chemical reaction but also describe the conditions by which the reaction rates can be altered. The factors such as concentration, temperature, pressure and catalyst affect the rate of a reaction.
The speed of a reaction or the rate of a reaction can be defined as the change in concentration of a reactant or product in unit time.
Rate \(=k[A]^{ a }[B]^{ y }\)
Here \(k\) is the rate constant
\(x+y\) gives the overall order of a reaction, whereas \(x\) and \(y\) represent the order with respect to the reactants \(A\) and \(B\), respectively.
The unit of rate constant for first order reaction is: