The construction of the first recombinant DNA emerged from linking a gene encoding antibiotic resistance with a native plasmid of __________.

Arrange the steps of gel electrophoresis in a proper sequence :
(A) Fragments of DNA are separated under an electric field in agarose gel
(B) DNA bands are cut out from the agarose gel and extracted
(C) DNA fragments are visualized by exposure to UV radiation
(D) Separated DNA fragment stained with ethidium bromide
Choose the correct answer from the options given below

In which ecosystem, a large fraction of energy flows more through DFC than through GFC?

Biolistics (gene gun) is suitable for:

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.
In EcoR I the latter 'R' is derived from the -

In India, the number of biosphere reserves and national parks are -

Match List - I with List - II.

List - I	List - II
(A) Citric acid	(I) Saccharomyces cerevisiae
(B) Ethanol	(II) Trichoderma polysporum
(C) Cyclosporin A	(III) Monascus purpureus
(D) Statins	(IV) Clostridium butylicum
	(V) Aspergillus niger

Choose the correct answer from the options given below:

A particle moves three times as fast as an electron. The ratio of the de Broglie wavelength of the particle to that of the electron is \( 1.813 \times 10^{-4} \). The mass of the particle is :

Which of the given values of x and y make the following pair of matrices equal?
\(\left[\begin{array}{cc}3 x-2 & y-x \\ 20 & -2\end{array}\right]\) and \(\left[\begin{array}{cc}4 & 2 \\ 14 x-8 & y-6\end{array}\right]\)

STIs are reported to be very high among persons in which age group?

Two infinitely long parallel conductors carrying currents \(I_1\) and \(I_2\) are at distance d apart. The force F on length L of one conductor due to the other is :

For a non ideal solution exhibiting positive deviation:
A. The vapour pressure is lower than that predicted by Raoult's law
B. The vapour pressure is higher than that predicted by Raoult's law.
C. The interaction at the molecular level are weaker than in the pure state.
D. The interaction at the molecular level are stronger than in the pure state.
E. Mixture of chloroform and acetone is a suitable example.
Choose the correct answer from the options given below:

The level of production where the revenue from sales is equal to the cost of production and marketing is known as