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 _________.

Homologous organs represent:

Match List I with List II.

LIST I	LIST II
A. Penicillium notatum	I. Ethanol
B. Trichoderma polysporum	II. Citric acid
C. Saccharomyces cerevisiae	III. Antibiotics
D. Aspergillus niger.	IV. Cyclosporin A

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Read the passage carefully. Attempt the questions.
An overwhelming majority (99 per cent) of animals and nearly all plants cannot maintain a constant internal environment. Their body temperature changes with the ambient temperature. In aquatic animals, the osmotic concentration of the body fluids change with that of the ambient air and water osmotic concentration. These animals and plants are simply conformers. Considering the benefits of a constant internal environment to the organism, we must ask why these conformers had not evolved to become regulators. Recall the human analogy we used above; much as they like, how many people can really afford an air conditioner? Many simply 'sweat it out' and resign themselves to suboptimal performance in hot summer months. Very small animals are rarely found in polar regions. During the course of evolution, the costs and benefits of maintainin a constant internal environment are taken into consideration. Some species have evolved the ability to regulate, but only over a limited range of environmental conditions, beyond which they simply conform.
If the stressful external conditions are localised or remain only for a short duration, the organism has five other alternatives for survival.
Conformers have not evolved to become regulators because:

Arrange the correct sequence of steps for gel electrophoresis.
(A). Load this DNA into the agarose gel matrix
(B). Cutting the DNA fragments by using a restriction enzyme
(C). Use ethidium bromide for DNA staining
(D). Separated bands of DNA are cut out from agarose gel
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Choose the correct sequence of events for the process of oogenesis:
A. The tertiary follicle changes into Graafian follicle
B. Formation of oogonia in fetal ovary.
C. Completion of first meiotic division by primary oocyte within the tertiary follicle.
D. Release of secondary oocyte from the ovary
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Which among the following cause pneumonia in human ?
(A) Streptococcus pneumoniae
(B) Wuchereria bancrofti
(C) Haemophilus influenzae
(D) Salmonella typhi
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When a potential difference is applied across a copper wire, the drift velocity of the electrons is v. If the same potential difference is applied across another copper wire of the same length but twice the diameter, the drift velocity of electrons will be

A generator develops an e.m.f of 150 V and has a terminal potential difference of 125 V, when the armature current is 50 A, the resistance of armature will be

The technology of biogas production was developed in India mainly due to the efforts of Indian Agricultural Research Institute (IARI) and ____________ (KVIC).

The condition where one species is harmed whereas the other is unaffected is called.

Which of the following statements are correct?
(A) A nucleus of mass number A has a radius R given by the expression \( R = R_0 A^{1/3} \)
(B) Volume of nucleus is proportional to mass number A
(C) The density of nucleus increases with the radius of nucleus.
(D) Density of nuclear matter does not depend on its mass number A
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The graph given below represents which of the following function?