1. A
   (a), (b), (c) Only
2. B
   (b), (c) Only
3. C
   (d), (e) Only
4. D
   (c), (d), (e) Only

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1. A
   *Rhizobium*
2. B
   *Frankia*
3. C
   *Rhodospirillum*
4. D
   *Beijerinckia*

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1. A
   (a), (b) and (d) Only
2. B
   (b), (c), (d) and (e) Only
3. C
   (a), (b), (c) and (d) Only
4. D
   (a), (c), (d) and (e) Only

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1. A
   Pollination by water is quite rare in flowering plants
2. B
   Pollination by wind is more common amongst abiotic pollination
3. C
   Flowers produce foul odours to attract flies and beetles to get pollinated
4. D
   Moths and butterflies are the most dominant pollinating agents among insects

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1. A
   The process of extraction of separated DNA strands from gel is called elution.
2. B
   The separated DNA fragments are stained by using ethidium bromide.
3. C
   The presence of chromogenic substrate gives blue coloured DNA bands on the gel.
4. D
   Bright orange coloured bands of DNA can be observed in the gel when exposed to UV light.

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1. A
   ABA
2. B
   Gibberellin
3. C
   Ethylene
4. D
   Cytokinin

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1. A
   Approximately 15%
2. B
   More than 18%
3. C
   About 10%
4. D
   Less than 7%

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1. A
   (a) and (b) Only
2. B
   (c) and (d) Only
3. C
   (d) and (e) Only
4. D
   (b) and (d) Only

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1. A
   Synaptonemal complex
2. B
   Bivalent
3. C
   Sites at which crossing over occurs
4. D
   Terminalization

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1. A
   Both Statement I and Statement II are correct
2. B
   Both Statement I and Statement II are incorrect
3. C
   Statement I is correct but Statement II is incorrect
4. D
   Statement I is incorrect but Statement II is correct

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1. A
   Polymerase Chain Reaction
2. B
   Gene Silencing
3. C
   Autoradiography
4. D
   Gene sequencing

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1. A
   Predation
2. B
   Amensalim
3. C
   Commensalism
4. D
   Competition

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1. A
   A $\rightarrow$ Mesocarp
2. B
   B $\rightarrow$ Endocarp
3. C
   C $\rightarrow$ Thalamus
4. D
   D $\rightarrow$ Seed

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1. A
   (a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
2. B
   (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
3. C
   (a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
4. D
   (a)-(ii), (b)-(iv), (c)-(i), (d)-(iii)

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1. A
   (a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)
2. B
   (a)-(i), (b)-(iii), (c)-(ii), (d)-(iv)
3. C
   (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
4. D
   (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)

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1. A
   raise its water potential
2. B
   lower its water potential
3. C
   make its water potential zero
4. D
   not affect the water potential at all

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1. A
   Sickle cell anaemia
2. B
   Myotonic dystrophy
3. C
   Haemophilia
4. D
   Thalessemia

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1. A
   Burning of fossil fuels
2. B
   Volcanic activity
3. C
   Weathering of rocks
4. D
   Rain fall and storms

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1. A
   5'GATACT3'; 3'CTATGA5'
2. B
   5'GAATTC3'; 3'CTTAAG5'
3. C
   5'CTCAGT3'; 3'GAGTCA5'
4. D
   5'GTATTC3'; 3'CATAAG5'

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1. A
   (a), (b) and (c) only
2. B
   (a), (d) and (e) only
3. C
   (c), (d) and (e) only
4. D
   (a), (b) and (d) only

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1. A
   To provide the site for photorespiratory pathway
2. B
   To increase the number of chloroplast for the operation of Calvin cycle
3. C
   To enable the plant to tolerate high temperature
4. D
   To protect the vascular tissue from high light intensity

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1. A
   Sequence annotation
2. B
   Gene mapping
3. C
   Expressed sequence tags
4. D
   Bioinformatics

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1. A
   Both (A) and (R) are correct and (R) is the correct explanation of (A)
2. B
   Both (A) and (R) are correct but (R) is not the correct explanation of (A)
3. C
   (A) is correct but (R) is not correct
4. D
   (A) is not correct but (R) is correct

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1. A
   (a), (b), (d) and (e) Only
2. B
   (a), (c), (d) and (e) Only
3. C
   (a), (b) and (d) Only
4. D
   (c), (d) and (e) Only

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1. A
   CNG burns more efficiently than diesel
2. B
   The same diesel engine is used in CNG buses making the cost of conversion low
3. C
   It is cheaper than diesel
4. D
   It cannot be adulterated like diesel

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