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Doctors Medicines MCQs Q&A

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Consider a set U of 23 different compounds in a Chemistry lab. There is a subset S of U of 9  compounds, each of which reacts with exactly 3 compounds of U. Consider the following statements:  I. Each compound in U\S reacts with an odd number of compounds. II. At least one compound in U\S reacts with an odd number of compounds. III. Each compound in U\S reacts with an even number of compounds. Which one of the above statements is ALWAYS TRUE?
Which of the following statement(s) is/are CORRECT? I. Carbon compounds linked by only single bond are called saturated compounds. II. Carbon compounds having double or triple bonds are called unsaturated compounds. III. Saturated carbon compounds are more reactive than unsaturated carbon compounds.
Which of the following is the best method to degrade xenobiotic compounds?
Which of the following microbes are known to degrade xenobiotic compounds?
Consider the following statements and choose the correct answer:
1. Intense or strong light retards the growth of shoot
2. Shade plants are shorter and stockier than sun plants
3. Shade plants have dense covering of hairs while sun plants are less hairy
4. The stems of shade plants are taIler and more branched than that of sun plants
Given below are characteristics of an “ionic compound”. Identify the option that gives INCORRECT information. A. Ionic compounds are generally found in solid state. B. Ionic compounds have low melting point and high boiling point. C. Ionic compounds are soluble in solvents like benzene, etc. D. The X-ray analysis of ionic compounds reveals that they exist as molecules.
Given below are two premises (a) and (b). Four conclusions are drawn from them. Select the code that states validly drawn conclusion(s) [taking the premises individually or jointly]. Premises:   (a) All diamonds are precious stones. (b) Some carbon compounds are diamonds. Conclusions:  (i) All precious stones are diamonds. (ii) Some non-carbon compounds are precious stones. (iii) All precious stones are stones compounds. (iv) Some carbon compounds are precious stones.
Consider the following statements and choose the correct answer:
1. The C4 plants can absorb CO2 even from a much low CO2 concentration when the C3 plants fail to avail it
2. The C4 plants require less energy to fix CO2 as compared to C3 plants
3. C4 plants are better adapted to tropical and desert areas where sunlight is more intense and the growing season is longer
4. Maize is a C4 plant
Plants have been used as healers and health rejuvenators since times immemorial. More than half the drugs under clinical use owe their origin to plants. The Glossary of Indian Medicinal Plants lists 3000 plants. Which part of the plants is used most for medicinal properties ? 
S1:Palaeobotany is the study of fossil plants preserved in rocks dating back in millions of years.
P :Records of the history of the world are contained in fossils.
Q :Through the ages, plants have evolved from simple to more complex forms.
R :First there were water plants then land plants appeared during the Paleozoic era.
S :But since the fossil remains appear locked in rock layers, they are closely related to the geologist area of investigation.
S6:The fossil plants indicate the age of the rock, and also point to facts regarding climate, temperature and topography.

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