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1. Which one, of the following statements about all the four of Spongilla, Leech, Dolphin and Penguin is correct.
1) Spongilla has special collared cells called choanocytes, not found in the remaining three
2) All are bilaterally symmetrical
3) Penguin is homoiothermic while the remaining three are poikilothermic
4) Leech is a fresh water form while all others atemaririe

2. Which one of the following statements about human sperm incorrect?
1) Acrosome servesas a sensory structure leading the sperm towards the ovum
2) Acrosome serves no particular function
3) Acrosome has a conical pointed structure used for piercing and penetrating the egg, resulting in fertilisation
4) The sperm lysins in the acrosome dissolve the egg envelope facilitating fertilisation

3. The nerve centres which control the body temperature and the urge for eating are contained in
1) Cerebellum
2) Thalamus
3) Hypothalamus
4) Pons

4. What is true about RBCs in humans ?
1) They frarisport about 80 per cent oxygen only and the rest; 20 per cent of it is transported in dissolved state in blood plasma
2) They do not carry CO2 at all
3) They carry about 20–25 per cent of CO2
4) They do not carry CO2 at all. They carry about 20-25 per cent of CO2. They transport 99.5 percent of O2

5. Which one of the following is used as vector for cloning genes into higher organisms?
1) Rhizopus nigriccans
2) Retrovirus
3) Baculovirus
4) Salmonella typhimurium
6. Select the two corret statements out of the four (a–d) given below about lac operon.
1) Glucose or galactose may bind with the repressor and inactivate it
2) In the absence of lactose the repressor binds with the operator region
3) The z-gene codes for permease
4) This was elucidated by Francois Jacob and Jacque Monod

7. The scutellum observed in a grain of wheat or maize is comparable to which part of the seed in other monocotyledons ?
1) Aleurone layer
2) Plumule
3) Cotyledons
4) Endosperm

8. Ringworm in humans is caused by:
1) Nematodes
2) Viruses
3) Bacteria
4) Fungi

9. The technical term used for the androecium in a flower of China rose (Hibiscus rosasinensis) is:
1) Polyandrous
2) Polyadelphous
3) Monadelphous
4) Diadelphous

10. Which one of the following is an example of ex-situ conservation ?
1) Sacred groves
2) National park
3) Wildlife sanctuary
4) Seed bank
11. Wind pollinated flowers are :
1) large producing abundant nectar and pollen
2) small, producing nectar and dry pollen
3) small, brightly coloured, producing large number of pollen grains
4) small, producing large number of dry pollen grains

12. Keel is characteristic of the flowers of :
1) Calotropis
2) Bean
3) Gulmohur
4) Cassia

13. The biomass available for consumption by the herbivores and the decomposers is called :
1) Standing crop
2) Gross primary productivity
3) Net primary productivity
4) Secondary productivity

14. Seminal plasma in human males is rich in :
1) DNA and testosterone
2) ribose and potassium
3) fructose and calcium
4) glucose and calcium

15. The principal nitrogenouse excretory compound in humans is synthesised:
1) in liver and also eliminated by the same through bile
2) in the liver, but eliminated mostly through kidneys
3) in kidneys but eliminated mostly through liver
4) in kidneys as well as eliminated by kidneys
16. Darwin’s finches are a good example of :
1) Adaptive radiation
2) Convergent evolution
3) Industrial melanism
4) Connecting link

17. Which one of the following statements about morula in humans is corect?
1) It has more or less equal quantity of cytoplasm and DNA as in uncleaved zygote
2) It has more cytoplasm and more DNA than an uncleaved zygote
3) It has almost equal quantity of cytoplams as an uncleaved zygote but much more DNA
4) It has far less cytoplasm as well as less DNA than in an uncleaved zygote

18. An element playing important role in nitrogen fixation is :
1) Manganese
2) Zinc
3) Molybdenum
4) Copper

19. The two gases making highest relative contribution to the greenhouse gases are :
1) CFC5 and N2O
2) CO2 and N2O
3) CO2 and CH4
4) CH4 and N2O

20. Toxic agents present in food which interfere with thyroxine synthesis lead to the development of :
1) simple goitre
2) thyrotoxicosis
3) toxic goitre
4) cretinism
101. The radii of circular orbits of two satellites A and B of the earth, are 4R and R, respectively. If the speed of satellite A is 3V, then the speed of satellite B will be :
1) 12V
2) 3V/2
3) 3V/4
4) 6V

102. A vibration magnetometer placed in magnetic meridian has a small bar magnet. The magnet executes oscillations with a time period of 2 sec in earth’s horizontal magnetic field of 24 microtesla. When a horizontal field of 18 microtesla is produced opposite to earth’s field by placing a current carrying wire, the new time period of magnet will be
1) 3s
2) 4s
3) 1s
4) 2s

103. The total radiant energy per unit area, normal to the direction of incidence, received at a distance R from the centre of a star of radius r, whose outer surface radiates as a black body at a temperature T K is given by
(Where σ is Stefan’s Constant)
1) σr4T4/r4
2) 4πσr2T4/R2
3) σr2T4/R2
4) σr2T4/4πr2

104. A thin ring of radius R meter has charge q coulomb uniformly spread on it. The ring rotates about its axis with a constant frequency of f revolutions/ s. The value of magnetic induction in Wb/m2 at the centre of the ring is:
1) µ0q/2fR
2) µ0qf/2R
3) µ0qf/2πR
4) µ0q/2πfR

105. Which of the following statement is false for the properties of electromagnetic waves?
1) Both electric and magnetic field vectors are parallel to each other perpendicular to the direction of propagation of wave
2) These waves do not require any material medium for propagation
3) Both electric and magnetic field vectors attain the maxima and minima at the same place and same time
4) The energy in electromagnetic wave is divided equally between electric and magnetic vectors
151. Which of the following statements about primary amines is ‘False’?
1) Aryl amines react with nitrous acid to produce phenols
2) Alkyl amines are stronger bases than ammonia
3) Alkyl amines are stronger bases than aryl amines
4) Alkyl amines react with nitrous acid to produce alcohols

152. The correct order of increasing reactivity of C–X bond towards nucleophile in the following compound is
1.

2.
3. (CH3)3C–X
4. (CH3)2CH–X
1) 4 < 3 < 1 < 2
2) 3 < 2 < 1 < 4
3) 1 < 2 < 4 < 3
4) 2 < 3 < 1 < 4

153. For an endothermic reaction, energy of activation is Ea and enthalpy of reaction is ∆H (both of these in kJ/mol). Minimum value of Ea will be
1) more than ∆H
2) equal to zero
3) less than ∆H
4) equal to ∆H
154. Which one is most reactive towards SN1 reaction ?
1) C6H6C(CH3)(C6H5)Br
2) C6H5CH2Br
3) C6H5CH(C6H5)Br
4) C6H5CH(CH3)Br
155. Oxidation states of P in H4P2O5, H4P2O6, H4P2O7, are respectively
1) +5, +4, +3
2) +3, +4, +5
3) +3, +5, +4
4) +5, +3, +4
1. Which one, of the following statements about all the four of Spongilla, Leech, Dolphin and Penguin is correct.
1) Spongilla has special collared cells called choanocytes, not found in the remaining three
2) All are bilaterally symmetrical
3) Penguin is homoiothermic while the remaining three are poikilothermic
4) Leech is a fresh water form while all others atemaririe

2. Which one of the following statements about human sperm incorrect?
1) Acrosome servesas a sensory structure leading the sperm towards the ovum
2) Acrosome serves no particular function
3) Acrosome has a conical pointed structure used for piercing and penetrating the egg, resulting in fertilisation
4) The sperm lysins in the acrosome dissolve the egg envelope facilitating fertilisation

3. The nerve centres which control the body temperature and the urge for eating are contained in
1) Cerebellum
2) Thalamus
3) Hypothalamus
4) Pons

4. What is true about RBCs in humans ?
1) They frarisport about 80 per cent oxygen only and the rest; 20 per cent of it is transported in dissolved state in blood plasma
2) They do not carry CO2 at all
3) They carry about 20–25 per cent of CO2
4) They do not carry CO2 at all. They carry about 20-25 per cent of CO2. They transport 99.5 percent of O2
5. Which one of the following is used as vector for cloning genes into higher organisms?
1) Rhizopus nigriccans
2) Retrovirus
3) Baculovirus
4) Salmonella typhimurium
11. Wind pollinated flowers are :
1) large producing abundant nectar and pollen
2) small, producing nectar and dry pollen
3) small, brightly coloured, producing large number of pollen grains
4) small, producing large number of dry pollen grains
View Answer
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Marks: 3

12. Keel is characteristic of the flowers of :
1) Calotropis
2) Bean
3) Gulmohur
4) Cassia

13. The biomass available for consumption by the herbivores and the decomposers is called :
1) Standing crop
2) Gross primary productivity
3) Net primary productivity
4) Secondary productivity

14. Seminal plasma in human males is rich in :
1) DNA and testosterone
2) ribose and potassium
3) fructose and calcium
4) glucose and calcium

15. The principal nitrogenouse excretory compound in humans is synthesised:
1) in liver and also eliminated by the same through bile
2) in the liver, but eliminated mostly through kidneys
3) in kidneys but eliminated mostly through liver
4) in kidneys as well as eliminated by kidneys