Arrange the following PCR steps in the correct sequence.
A. Extension of Primers
B. Amplification of DNA
C. Annealing of Primers
D. Denaturation of DNA fragment
Choose the correct answer from the options given below:

Hind-ll cuts DNA at a particular point by recognising a specific sequence of

After the completion of replication, each DNA molecule will have one parental strand and one newly synthesized strand. This scheme is known as:

Heroin, commonly called smack is chemically _________ which is a white, odourless, bitter crystalline compound.

Which of the following does not affect the Hardy-Weinberg equilibrium?

The reason for the survival of the melanised moth, during the post-industrialization period in England was:

Arrange the evolutionary human species in their occurrence from recent to the oldest order.
(A) Australopithecus
(B) Homo erectus
(C) Homo sapiens
(D) Neanderthal man
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Read the passage carefully and answer the Questions
The term vitamin was coined from the word vital +amine since the earlier identified compounds had amino groups.
Later work showed that most of them didn't contain amino groups, so the letter "e" was dropped and ther term vitamin is used these days.
Vitamins are classified into two groups depending upon their solubility in water or fat. Fat soluble vitamins are soluble in fat and oils but insoluble in water. They are stored in liver and adipose (fat storing) tissues. Water-soluble vitamins are soluble in water. They must be supplied regularly in the diet as they are readily excreated in urine.
Deficiency of which vitamin causes scurvy?

The rate constant, activation energy and the Arrhenius parameter at \(27^{\circ} C\) are \(2.0 \times 10^{-5} s^{-1}, 100 kJ mol ^{-1}\) and \(6.0 \times 10^{14} s^{-1}\) respectively.
The value of the rate constant at a very high temperature \((T \rightarrow \infty)\) approaches to:

What should be the size of an obstacle to observe diffraction?

The conductivity of an ionic solution depends on:
A. The nature of the electrolyte added
B. The Volume of the container
C. The size of the ions and their solvation
D. Pressure
E. Concentration of the electrolytes
Choose the correct answer from the options given below :

\( P_1, P_2, P_3 \) are three Polaroid sheets; \( P_1 \) and \( P_3 \) are two crossed polaroids. What should be the angle between Polaroids \( P_1 \) and \( P_2 \), so that the value of \( I' = I_0/4 \)? (Where \( I' \) is intensity after \( P_2 \))

Exposure of chloroform in air in the presence of sunlight releases a gas which is poisonous. Identify the gas.