Arrange the given steps of 'Recombinant DNA Technology' in correct sequence.
A. Transfer of recombinant plasmid into host cell for cloning.
B. Ligation of desired DNA to plasmid.
C. Selection of desired DNA and plasmid.
D. Cutting of desired DNA and plasmid using same restriction enzyme.
Choose the correct answer from the options given below:

Pollen grains are protected from high temperature and strong acids due to the presence of :

Observe the given figure and answer the following questions:

Which of the following are not part of Innate immunity?
(A) Skin and acid in stomach
(B) B-Lymphocytes
(C) IgE and IgG
(D) Tears from eyes

Darwin's finches and Australian marsupials are an example of:

The 'hilum' represents the junction between:

Match List I with List II

LIST I (Drugs)	LIST II (Obtained from)
A. Heroin	I. Tobacco plant
B. Cannabinoids	II. Erythroxylum coca
C. Cocaine	III. Cannabis sativa
D. Nicotine	IV. Papaver somniferum

Choose the correct answer from the options given below:

Read the passage carefully and answer the given questions.
Recombinant DNA Technology
Asexual reproduction preserves the genetic information, while sexual reproduction permits variation. Traditional hybridization procedures used in plants and animals breeding very often lead to inclusion and multiplication of undesirable genes along with the desired genes. The techniques of genetic engineering, which include creation of recombinant DNA, use of gene cloning and gene transfer, overcome this limitation and allow us to isolate and introduce only one or a set of desirable genes without introducing genes into the target organism.
In Recombinant DNA Technology, what is the role of the "selectable marker gene"?

Arrange the given steps of the Hershey and Chase experiment in correct sequence.
(A) Separation of virus particles from bacteria by centrifugation
(B) Infection of bacteria with phage DNA
(C) Radioactive bacteriophages were allowed to attach the bacteria
(D) Removal of viral coat from bacteria by blending
Choose the correct answer from the options given below:

A ray of light strikes a glass plate at an angle of \(60^{\circ}\). If the reflected and refracted rays are perpendicular to each other then the refractive index of glass is

The mobility of charge carriers increases with

The half-life of a first order reaction is \(25\text{ minutes}\). Its rate constant is:

The degree of the differential equation
\(\left[1+\left(\frac{d y}{d x}\right)\right]^3=\left(\frac{d^2 y}{d x^2}\right)^2\) is :

A tank is filled with water to a height of 15 cm. If the refractive index of water is 1.33, the apparent depth of a needle lying at the bottom of the tank will be