Medical Entrance Test - Biology ON 22 MAY

1. Competition is the most severe between two

a)Closely related species growing in different niches b)Closely related species growing in the same habitat c)Distantly related species growing in the same habitat d)Distantly related species growing in different niches


2. When population reaches carrying capacity

a) Morality Rate = Birth Rate b) Morality Rate > Birth Rate c)Morality Rate < Birth Rate d)None of the above


3. Density of a population (D) is

a)D = S(size)W(weight) b) D = S(space)N(number) c) D = N(number)S(space) d)None of the above


4. Human population shows

a)J-shaped growth curve b) Z-shaped growth curve c) S-shaped growth curve d)All the above


5. The phenomenon of one organism being benefitted with out affecting the other is

a)Scavenging b)Amensalism c)Commensalism d)Symbiosis


6. The spread of Opuntia was controlled by

a)Allowing cattle to graze over it b)Allowing sheep and goats to browse over it c)Introducing insect dSpraying herbicide


7. The relation between algae and fungi in a lichen is

a)Symbiosis b)Parasitism c)Commensalism d)Protocooperation


8. Association between Sea Anemone and Hermit Crab in gastropod shell is that of

a)Symbiosis b)Commensalism c)Parasitism d)Amensalism


9. Which one is true?

a)Commensalism when none of the interacting populations affect each other b)Symbiosis when the interaction is useful to both the populations c)Symbiosis when neither populations affects each other d)Commensalism when the interaction is useful to both the population


10. Association of animals when both partners are benefitted

a)Colony b)Mutualism c)Commensalism d)Amensalism


11. A parasite living within tissue of host is

a)Epiphyte b)Endophyte c)Ectophyte d)None of the above


12. Deserts can be converted into green land by

a)Tropical trees b)Oxylophytes c)Halophytes d)Psammophytes


13. Fungal association of roots of higher plants in mycorrhiza is

a) Parasitism b) Hyperparasitism c) Mutualism d)Commensalism


14. Types of interaction that occur in predation and parasitism are

a) +,+ b) -,- c) +,0 d) +,-


15. An unrestricted reproductive capacity is called

a) Birth rate b) Biotic potential c) Carrying capacity d) Fertility


16. Association between entomophilous flowers and pollinating agent is

a) Commensalism b) Coevolution c) Mutualism d) Cooperation


17. Rhizobium bacteria and root nodules of Pea have an association called

a) Predation b) Parasitism c) Symbiosis d) Commesalism


18. Mycorrhiza is an example of

a)Symbiotic relationships b) Ectoparasitism c) Endoparasitism d) Decomposers


19. Which is correct food chain in grassland?

a)Grass → Snake → Insect → Deer b)Grass → Wolf → Deer → Buffalo c) Bacteria → Grass → Rabbit → Wolf d)Grass → Insect → Frog → Snake


20. Path of energy flow in an ecosystem is

a)Herbivores → Producers → Carnivores → Decomposers b)Herbivores → Carnivores → Producers → Decomposer c)Producers → Carnivores → Herbivores → Decomposers d)Producers → Herbivores → Carnivores → Decomposers


21. Pyramid of energy (in a forest/pond ecosystem) is

a)Always inverted b)Always upright c)Spindle-shaped d)Both upright and inverted depending upon ecosystem


22. In a tree ecosystem, the pyramid of numbers is

a)Upright b) Inverted c) Spindle like d) Variable


23. Savannahs are
a)Tropical rain forests b) Desert scrubs c)Grassland with scattered trees d)Dense forests with closed canopy


24. Who proposed the term ecosystem?

a)Odum b)Gardner c)Warming d)Tansley


25. An ecosystem does not normally alter because it is in a state of

a)Homeostasis b) Imbalance c) Deficient light d) Deficient components


26. Tropical forests are denser due to

a)Wild animals b)High temperature and less rainfall c)Low temperature and excess rain d)High temperature and high rain


27. Stratification is more common in

a)Tropical rain forest b)Deciduous forest c) Temperate forest d) Tropical savannah


28. The most stable ecosystem is

a)Forest b)Mountain c)Desert d)Ocean


29. Forest management is related to

a)Silviculture b)Sericulture c)Apiculture d)Olericulture


30. Silent valley has been preserved as it has

a)Recreational value b) Valuable tinder c) Natural forest d)Rare plants and animals


31. Decreased rainfall in northern areas is due to

a)Changes in sun b)Global phenomenon c)Deforestation in catchment areas d)Deforestation in evaporating area near equator


32. Jhoom cultivation refers to

a)Cultivation of Jamun trees b) Cultivation of medicinal plants by tribes c)Tribal method of shifting cultivation d)cultivation of terraces


33. Soil erosion is prevented by

a)Afforestation b)Increased bird population c) Overgrazing d) Removal of vegetation


34. L.P.G is

a)Low price gas b) Fossil fuel c) Low pressure gas d) Biogas


35. Nonconventional source of energy is

a)Wood b)Biogas/Solar Energy c)Coal d)Petroleum


36. Ecofriendly method is

a)Plantation of C3 plants b)Plantation of Sugarcane c)Energy plantation d) None of the above


37. Animals like Mice, Lizards and Cockroach share their habitat with human dwellings. They are

a)Inquilines b) Cultigens c) Transplants d) Humus


38. Major reason for extinction of animals is

a)Predation b) Pollution c) Habitat destruction d) Felling of trees


39. Which animal has become extinct from India?

a)Snow Leopard b) Hippopotamus c) Wolf d) Cheetah


40. National Wildlife Protection Act was formulated during

a)1972 b) 1974 c) 1976 d) 1978


41. First national park of India is

a)Kanha N.P b) Periyar N.P c) Corbett N.P d) Bandipur N.P


42. Breeding place of Flamingo (Hansawar) in India is

a)Chilka Lake b) Sambar Lake c) Rann of Kutch d) Ghana Vihar


43. Kanha National Park is located in

a)Assam b) Rajasthan c) Uttar Pradesh d) Madhya Pradesh


44. A species restricted to a given area is

a)Endemic species b)Allopatric species c) Sympatric species d) Sibling species


45. Animal species protected in Kaziranga National Park is

a)Panthera leo b) Rhinoceros unicornis c) Panthera tigris d) Macaca mulatta


46. Which one is endangered species?

a)Cuscuta b) Acacia nilotica c) Nepenthes d) Both B and C


47. Wildlife is conserved

a)In situ b) Ex situ c) Both A and B d) Selective hunting of predators


48. Organisation responsible for maintaining Red Data Book is

a)IUCN b) BNHS c) IBWL d) WWF


49. Red Data Book contains information about

a)Red coloured insects b)Red eyed birds c)Red coloured fishes d) Endangered plants and animals


50. Mark the national tree

a)Ficus religiosa b)Mangifera indica c) Ficus bengalensis d) Azadirachta indica

answersof questions posted on 19 may .

1.A
2.B
3.D
4.A
5.C
6.B
7.B
8.D
9.C
10.A

PHYSICS QUESTIONS

PHYSICS QUESTIONS

Question 1. Equation of a Stationary wave is given by

Option 1 : y = 2A sin kx cos wt

Option 2 : y = A sin k(x-vt)

Option 3 : y = A cos wt / sin x

Option 4 : y = 2 sin at

Question 2. What happens when a cappilary tube is dipped in water in a weightless state

Option 1 : Water level raises

Option 2 : Water level decreases

Option 3 : Raises to the maximum height available

Option 4 : No change

Question 3. Two equal forces acting against each other have equal resultant.What could be the angle between then

Option 1 : 0°

Option 2 : 90°

Option 3 : 120°

Option 4 : 180°

Question 11. A closed pipe of length one meter emitting second overtone is in unision with an open pipe emitting thrid overtone. Find the length of the open pipe.

Option 1 : 1.2 m

Option 2 : 1.6 m

Option 3 : 2.5 m

Option 4 : 3.2 m


Question 5. The focal length of an Objective of a Astronomical telescope is 0.75m and that of it's eyepiece is 0.05 m.Final image is found to be formed at 0.25m.It's magnification is

Option 1 : 18

Option 2 : 125

Option 3 : 12.5

Option 4 : 1.8

Question 6. What is the resistance of a ideal voltmeter

Option 1 : low

Option 2 : 0

Option 3 : high

Option 4 : infinity

Question 7. What is the fundamental frequency produced in an open pipe of length 0.5 m .,if the velocity of sound in air is 340m/sec

Option 1 : 345m/sec

Option 2 : 340Hz

Option 3 : 335Hz

Option 4 : 300Hz

Question 8. Which of the following colour has the minimum critical angle when passed from Glass to Air

Option 1 : Red

Option 2 : Yellow

Option 3 : Violet

Option 4 : Green

Question 9. Rays used to detect holes in metal sheets are

Option 1 : X-Rays

Option 2 : Ultraviolet rays

Option 3 : Infrared Rays

Option 4 : High-velocity Electron beam

Question 10. The Hydrogen spectrum in Ultra-violet rays is called

Option 1 : Lyman

Option 2 : Balmer

Option 3 : Pfund

Option 4 : Paschen

ANSWERS WILL BE POSTED ON 20 MAY.

answers of questions posted on 15 may are.

answers of questions posted on 15 may are.

question answers
1. A.
2. A.
3. C.
4 . B.
5. D.
6. B.
7. A.
8. C.
9. A.
10. B.

PHYSICS-UNITS AND DIMENSIONS

QUESTIONS
1. {A}Elastic strain is a dimensionless quantity.
{R}The ratio of two similar physical quantities is dimensionless.
options-[1]A is true ,R is true and R is correct explanation of A.
[2]A is true ,R is true but R is not correct explanation of A.
[3]A is true ,R is false.
[4]both A and R are false.

2.{A}Electric current is scalar.
{R}All fundamental physical quantities are scalar.
options- [1]A is true ,R is true and R is correct explanation of A.
[2]A is true ,R is true but R is not correct explanation of A.
[3]A is false ,R is true.
[4]both A and R are false.

3.{A}Plane angle is a dimensionless quantity.
{R}All unit less quantities are dimensionless.
options-[1] A is true ,R is true but R is not correct explanation of A.
[2]A is false ,R is true.
[3]both A and R are false.
[4]A is true ,R is true and R is correct explanation of A.

4.{A}In mechanics,we treat length,mass and time as the three basic or fundamental quantities.
{R}Length,mass and time cannot be obtained from one another.
options-[1]A is true ,R is true and R is correct explanation of A.
[2]A is true ,R is true but R is not correct explanation of A.
[3]both A and R are false.
[4]A is true ,R is false.

5.{A}the value of 'G' can not be derived by dimensional method.
{R}The value of proportionality constants can not be derived by dimensional method.
options-[1]A is true ,R is true and R is correct explanation of A.
[2]A is true ,R is true but R is not correct explanation of A.
[3]both A and R are false.
[4]A is true ,R is false.

6.What are the advantages of double tuned amplifier over single tuned amplifier?
options-[1]smaller bandwidth product and ideal curve characteristics
[2]larger gain bandwidth product and ideal curve characteristics

[3]smaller gain bandwidth product and response is flat and 40db slope sides

[4]larger gain bandwidth product and response is flat and 40db slope sides 7.The refractive index of glass is 3/2 and of water is 4/3. The refractive index of water with respect to glass is: options-[1]1/2 [2]9/8 [3]8/9 [4]2 8.The electrolyte used in a nickel-cadmium battery is distilled water and options-[1]diluted sulfuric acid [2]potassium hydroxide [3]lead sulfate [4]zinc oxide 9. Two resistances of 25 ohm and 75 ohm are connected in series across a source of 120V. Potential difference across 25 ohm resistance will be options-[1]20v [2]30v [3]90v [4]100v 10.A wire fixed at the upper end by length 'L' by applying a force F.The work done in stretching is options-[1]2FL/2 [2]2FL [3]FL [4]FL/2 answer will be posted on 16th may.