Recent questions tagged 2008

Two nuclei have their mass numbers in the ratio of 1 : 3. The ratio of their nuclear densities would be -

asked Jul 26, 2018 by pady_1

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A thin conducting ring of radius R is given a charge + Q. The electric field at the centre O of the ring due to the charge on the part AKB of the ring is E. The electric field at the centre due to the charge on the part ACDB of the ring is -

asked Jul 26, 2018 by pady_1

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Ascaris is characterized by :

asked Jul 26, 2018 by pady_1

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Consider the following statements about biomedical technologies, (i) During open heart surgery blood is circulated in the heart-lung machine (ii) Blockage in coronary arteries is removed by angiography (iii) Computerised Axial Tomography (CAT) shows detailed internal structure as seen in a section of body. (iv) X-ray provides clear and detailed images of organs like prostate glands and lungs Which two of the above statements are correct?

asked Jul 26, 2018 by pady_1

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Which one of the following in birds, indicates their reptilian ancestry?

asked Jul 26, 2018 by pady_1

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Main objective of production/use of herbicide resistant GM crops is to:

asked Jul 26, 2018 by pady_1

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Which one of the following is the correct statement regarding the particular psychotropic drug specified?

asked Jul 26, 2018 by pady_1

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Nitrogen fixation in root nodules of Alnus is brought about by:

asked Jul 26, 2018 by pady_1

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What will happen if the secretion of parietal cells of gastric glands is blocked with an inhibitor?

asked Jul 26, 2018 by pady_1

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Which one of the following is the correct matching of the site of action on the given substrate, the enzyme acting upon it and the end product?

asked Jul 26, 2018 by pady_1

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A transgenic food crop which may help in solving the problem of night-blindness in developing countries is:

asked Jul 26, 2018 by pady_1

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Consider the statements given below regarding contraception and answer as directed thereafter: (i) Medical Termination of Pregnancy (MTP) during first trimester is generally safe (ii) Generally chances of conception are nil until mother breast-feeds the infant upto two years (iii) Intrauterine devices like copper-T are effective contraceptives (iv) Contraception pills may be taken upto one week after coitus to prevent conception. Which two of the above statement are correct?

asked Jul 26, 2018 by pady_1

1 answer

Cry1 endotoxins obtained from Bacillus thuringiensis are effective against:

asked Jul 26, 2018 by pady_1

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The slow rate of decomposition of fallen logs in nature is due to their:

asked Jul 26, 2018 by pady_1

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Carbohydrates are commonly found as starch in plant storage organs. Which of the following five (1-5) properties of starch make it useful as a storage material? (1) Easily translocated (2) Chemically non-reactive (3) Easily digested by animals (4) Osmotically inactive (5) Synthesized during photosynthesis

asked Jul 26, 2018 by pady_1

2 answers

Match the disease in Column I with the appropriate items (pathogen/ prevention/ treatment) in Column II.

asked Jul 26, 2018 by pady_1

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Cornea transplant in humans is almost never rejected. This is because:

asked Jul 26, 2018 by pady_1

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What is antisense technology?

asked Jul 26, 2018 by pady_1

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Modern detergents contain enzyme preparations of:

asked Jul 26, 2018 by pady_1

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Consider the following statements concerning food chains: (i) Removal of 80% tigers from an area resulted in greatly increased growth of vegetation (ii) Removal of most of the carnivores resulted in an increased population of deers (iii) The length of food chains is generally limited to 3-4 trophic levels due to energy loss (iv) The length of food chains may vary from 2 to 8 trophic levels

asked Jul 26, 2018 by pady_1

1 answer

During the propagation of a nerve impulse, the Q action potential results from the movement of:

asked Jul 26, 2018 by pady_1

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Which one of the following is the correct difference between Rod cells and Cone cells of our retina? OPTIONS :

asked Jul 26, 2018 by pady_1

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In germinating seeds fatty acids are degraded exclusively in the:

asked Jul 26, 2018 by pady_1

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Which one of the following phyla is correctly matched with its two general characteristic?

asked Jul 26, 2018 by pady_1

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The $C_4$ plants are photosynthetically more efficient than $C_3$ plants because

asked Jul 26, 2018 by pady_1

1 answer

The blood calcium level is lowered by the deficiency of:

asked Jul 26, 2018 by pady_1

2 answers

Haploids are more suitable for mutation studies than the diploids. This is because:

asked Jul 26, 2018 by pady_1

1 answer

Which one of the following pairs of organs includes only the endocrine glands?

asked Jul 26, 2018 by pady_1

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Gel electrophoresis is used for:

asked Jul 26, 2018 by pady_1

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Vascular tissues in flowering plants develop from:

asked Jul 26, 2018 by pady_1

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Quercus species are the dominant component in:

asked Jul 26, 2018 by pady_1

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Vacuole in a plant cell:

asked Jul 26, 2018 by pady_1

1 answer

Human insulin is being commercially produced from a transgenic species of:

asked Jul 26, 2018 by pady_1

1 answer

Dry indehiscent single-seeded fruit formed from bicarpellary, syncarpous, inferior ovary is:

asked Jul 26, 2018 by pady_1

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Which one of the following is being tried in India as a biofuel substitute for fossil fuels?

asked Jul 26, 2018 by pady_1

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Thermococcus, Methanococcus and Methanobacterium exemplify:

asked Jul 26, 2018 by pady_1

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Which type of white blood cells are concerned with the release of histamine and the natural anti-coagulant heparin?

asked Jul 26, 2018 by pady_1

1 answer

Given below is a diagrammatic cross section of a single loop of human cochlea: A B C A D Which one of the following options correctly represents the names of three different parts?

asked Jul 26, 2018 by pady_1

1 answer

Consider the following four measures (1-4) that could be taken to successfully grow chickpea in an area where bacterial blight disease is common: (i) Spray with Bordeaux mixture (ii) Control of the insect vector of the disease pathogen (iii) Use of only disease-free seeds (iv) Use of varieties resistant to the disease Which two of the above measures can control the disease?

asked Jul 26, 2018 by pady_1

1 answer

Thorn of Bougainvillea and tendril of Cucurbita are examples of:

asked Jul 26, 2018 by pady_1

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The rupture and fractionation do not usually occur in the water column in vessel/tracheids during the ascent of sap because of :

asked Jul 26, 2018 by pady_1

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The linking of antibiotic resistance gene with the plasmid vector became possible with:

asked Jul 26, 2018 by pady_1

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The chemiosmotic coupling hypothesis of oxidative phosphorylation proposes that Adenosine Tri-Phosphate (ATP) is formed because:

asked Jul 26, 2018 by pady_1

1 answer

Given below are four methods (A-D) and their modes of action (1-4) in achieving contraception. Select their correct matching from the four options that follow: Answer codes :

asked Jul 26, 2018 by pady_1

1 answer

Unisexuality of flowers prevents:

asked Jul 26, 2018 by pady_1

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The Replum is present in the ovary of flower of:

asked Jul 26, 2018 by pady_1

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What is true about the isolated small tribal populations?

asked Jul 26, 2018 by pady_1

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In leaves of C-4 plants malic acid synthesis during $CO_2$ fixation occurs in:

asked Jul 26, 2018 by pady_1

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Which one of the following conditions in humans is correctly matched with its chromosomal abnormality/linkage? OPTION :

asked Jul 26, 2018 by pady_1

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Which one of the following statements is incorrect about menstruation?

asked Jul 26, 2018 by pady_1

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