Select the statements which hold true for immune system:
A. Innate immunity or nonspecific immunity is present at the time of birth.
B. Acquired immunity is never pathogen specific
C. Cytokine barriers are a part of innate immunity
D. Rheumatoid arthritis is an auto-immune disease
Choose the correct answer from the options given below:

The A and B polypeptides chains in insulin are linked together by which bond?

Match List - I with List - II.

List - I	List - II
(A) Transgenic mice	(I) Hereditary disease
(B) PCR	(II) Safety of Polio vaccine
(C) Golden rice	(III) Molecular Diagnosis
(D) Gene Therapy	(IV) Enhanced nutritional value

Choose the correct answer from the options given below:

Depending upon the immediate urgency of the need to conserve biodiversity, arrange the options given below in a descending order.
(A) Hot spots
(B) Sacred groves
(C) Ex situ method
(D) Bioreserves
Choose the most appropriate answer from the options given below:

Read the following paragraph and answer the given questions:
DRUGS AND ALCOHOL ABUSE
The drugs, commonly abused are opioids, cannabinoids, and coca alkaloids. Opioids are the drugs, which bind to specific opioid receptors present in our central nervous system and gastrointestinal tract. Heroin, commonly called smack is chemically diacetylmorphine which is a white, odourless, bitter crystalline compound. Cannabinoids are a group of chemicals, which interact with cannabinoid receptors present principally in the brain. Natural cannabinoids are obtained from the inflorescences of the plant Cannabis sativa. The flower tops, leaves and the resin of cannabis plant are used in various combinations to produce marijuana, hashish, charas and ganja. Generally taken by inhalation and oral ingestion, these are known for their effects on cardiovascular system of the body. It interferes with the transport of the neuro-transmitter dopamine. Cocaine, commonly called coke or crack is usually snorted. It has a potent stimulating action on central nervous system, producing a sense of euphoria and increased energy. Excessive dosage of cocaine causes hallucinations. Other well-known plants with hallucinogenic properties are Atropa belladona and Datura. These days cannabinoids are also being abused by some sportspersons. 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. Several plants, fruits and seeds having hallucinogenic properties have been used for hundreds of years in folk-medicine, religious ceremonies and rituals all over the globe.
Heroine (Smack) which is extracted from the latex of poppy plant is chemically called:

Which of the following statements are incorrect?
(A) In bacteria, Bt toxin exists as inactive protoxin
(B) Due to alkaline pH in the gut, the toxin is converted into its active form
(C) The toxin is already present in active form in bacteria
(D) The inactive toxin binds to the surface of midgut and causes cell swelling and lysis.
Choose the correct answer from the options given below :

In Sickle-cell anemia the substitution of amino acid in the globin protein results due to the single base substitution at the sixth codon of the \beta-globin gene from _________.

The overhead horizontal power transmission line carries a current of 75 A from east to west direction. The magnetic field above it at a vertical distance of 1.2 m will be

A parallel beam of light of wavelength 500 nm is incident normally on a slit of width d. If the distance between slit and screen is 0.6 m and distance of second order minimum from the centre of the screen is 6.0 mm, What is the width of the slit?

The current through a \(4 / 3 \Omega\) external resistance connected to a parallel combination of two cells with emfs of 2 V and 1 V , internal resistances \(1 \Omega\) and \(2 \Omega\) respectively, is :

The magnetic flux linked to a coil changes from 10 \(\times 10^{-3}\) Wb to 6 \(\times 10^{-3}\) Wb in 0.01 s. The induced emf will be :

Arrange the following steps of Polymerase Chain Reaction in correct sequence.
(A) Amplified DNA fragments
(B) Annealing of primers
(C) Extension
(D) Denaturation of dsDNA
Choose the correct answer from the options given below :

The energy of the electron in any given state for the hydrogen atom is \( -13.6/n^2 \, \text{eV} \). Identify the correct statements among the following.
(A) The negative sign in \( -13.6 \, \text{eV} \) signifies that the electron is bound to the nucleus.
(B) The negative sign in \( -13.6 \, \text{eV} \) signifies that the electron requires 13.6 eV energy to be separated from the nucleus.
(C) 3.4 eV energy is required to take the electron from the ground to the first excited state.
(D) To find the energy of the third excited state, the value of n is 4.
Choose the correct answer from the options given below: