Observe the diagram and answer the question given below .

Each trophic level has a certain mass of living material at a particular time called as:

Read the following paragraph and answer the given questions.
RNAi takes place in all eukaryotic organisms as a method of cellular defense. The source of this complementary RNA could be from an infection by viruses having RNA genomes or mobile genetic elements (transposons) that replicate via an RNA intermediate. Insulin from an animal source, though caused some patients to develop allergy or other types of reactions to the foreign protein. Insulin consists of two short polypeptide chains: chain A and chain B, that are linked together by disulphide bridges. Transgenic mice are being developed for use in testing the safety of vaccines before they are used on humans. Transgenic mice are being used to test the safety of the polio vaccine. If successful and found to be reliable, they could replace the use of monkeys to test the safety of batches of the vaccine. Specific Bt toxin genes were isolated from Bacillusthuringiensis} and incorporated into the several crop plants such as cotton. The choice of genes depends upon the crop and the targeted pest, as most Bt toxins are insect-group specific. The toxin is coded by a gene cryIAc named cry. There are a number of them, for example, the proteins encoded by the genes cryIAc and cryIIAb control the cotton bollworms, that of cryIAb controls corn borer.

Which of these is not present in mature insulin?

Match List-I with List-II

List-I (Diseases)	List-II (Causative organisms)
(A) Pneumonia	(I) Microsporum
(B) Ringworms	(II) Wuchereria bancrofti
(C) Elephantiasis	(III) Entamoeba histolytica
(D) Amoebiasis	(IV) Haemophilus influenzae

Choose the correct answer from the options given below:

The polluting potential of waste water is determined by:

Which one of the following hormones is essential for maintenance of endometrium?

During sewage treatment, the anaerobic sludge digesters produce the biogas. The components of biogas are -

In case of malaria, the rupture of RBCs is associated with release of a toxic substance called, _______ , which is responsible for the chill and high fever recurring after every three to four days.

Consider \(z=x+3 y\) subject to the constraints \(2 x+3 y \geq 6,2 x+y \leq 8, x \geq 0, y \geq 0\). The minimum value of \(z\) is :

Identify the most acidic compound

The following statements are given related to Wheatstone Bridge:
1. when Wheatstone Bridge is balanced, no current flows through the galvanometer arm.
2. Wheatstone Bridge works on the principle of Kirchhoff's law.
3. Being a null method based experiment, the result is free from the effect of extra resistances (cell resistance) of the circuit
4. Wheatstone Bridge is most sensitive when all the four resistances are nearly of the same magnitude.
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For the given five values 18, 25, 20, 36, 49, the three years moving averages are

Which of the following statements are correct?
(A) In an ac circuit containing only resistance, power consumption is \( I^2 R \).
(B) In an LCR circuit, there is resonance at zero phase difference between \( X_C \) and \( X_L \) and the power consumption is \( I(\omega X_C + \omega X_L)^{1/2} \).
(C) In an LCR circuit, at resonance, impedance is minimum.
(D) In an LCR circuit, there is resonance at zero phase difference between \( X_C \) and \( X_L \) and the power consumption is zero.
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Select the correct relation of half life for a zero order reaction.