26. Which one of the following plants shows vexillary aestivation and diadelphous stamens?
(1) Allium cepa
(2) Solanum nigrum
(3) Colchicum autumnale
(4) Pisum sativum
27. DNA polymorphism forms the basis of
(1) Both genetic mapping and DNA
finger printing
(2) Translation
(3) Genetic mapping
(4) DNA finger printing
28. What amount of energy is released from
glucose during lactic acid fermentation?
(1) About 10%
(2) Less than 7%
(3) Approximately 15%
(4) More than 18%
29. Identify the correct set of statements :
(a) The leaflets are modified into
pointed hard thorns in Citrus and Bougainvillea
(b) Axillary buds form slender and
spirally coiled tendrils in cucumber and pumpkin
(c) Stem is flattened and fleshy in
Opuntia and modified to perform the function of leaves
(d) Rhizophora shows vertically upward
growing roots that help to get oxygen for respiration
(e) Subaerially growing stems in
grasses and strawberry help in vegetative propagation
Choose the correct Ans: from the
options given below :
(1) (b), (c), (d) and (e) Only
(2) (a), (b), (d) and (e) Only
(3) (b) and (c) Only
(4) (a) and (d) Only
30. Which one of the following statements
cannot be connected to Predation?
(1) Both the interacting species are
negatively impacted
(2) It is necessitated by nature of
maintain the ecological balance
(3) It helps in maintaining species
diversity in a community
(4) It might lead to extinction of a
species
31. Given below are two statements :
Statement I :
Cleistogamous flowers are invariably
autogamous
Statement II :
Cleistogamy is disadvantageous as
there is no chance for cross pollination
In the light of the above statements,
choose the correct answer from the options given below :
(1) Statement I is correct but
Statement II is incorrect
(2) Statement I is incorrect but
Statement II is correct
(3) Booth Statement I and Statement II
are correct
(4) Both Statement I and Statement II
are incorrect
32. Application of which of the following
phytohormones has resulted in this increased yield as the hormone is known to
produce female flowers in the plants :
(1) Ethylene
(2) Cytokinin
(3) ABA
(4) Gibberellin
33. Match List -I with List - II
List –I List -II
(a) Manganese (i) Activates the
enzyme catalase
(b) Magnesium (ii) Required for pollen
germination
(c) Boron (iii) Activates
enzymes of respiration
(d) Iron (iv) Function in
splitting of water during photosynthesis
Choose the correct answer from the
options given below :
(1) (a)-(vi), (b)-(i), (c)-(ii),
(d)-(iii)
(2) (a)-(iii), (b)-(i), (c)-(ii),
(d)-(iv)
(3) (a)-(iii), (b)-(iv), (c)-(i),
(d)-(ii)
(4) (a)-(iv), (b)-(iii), (c)-(ii),
(d)-(i)
34. Which one of the following never occurs
during mitotic cell division?
(1) Pairing of homologous chromosomes
(2) Coiling and condensation of the
chromatids
(3) Spindle fibres attach to
kinetochores of chromosomes
(4) Movement of centrioles towards
opposite poles
35. The gaseous plant growth regulator is used
in plants to :
(1) help overcome apical dominance
(2) kill dicotyledonous weeds in the
fields
(3) speed up the malting process
(4) promote root growth and root hair
formation to increase the absorption surface
36. Match the plant with the kind of life
cycle it exhibits:
List-I List-II
(a) Spirogyra (i) Dominant diploid
sporophyte vascular plant, with highly
reduced male or female gametophyte
(b) Fern (ii) Dominant haploid
free-living gametophyte
(c) Funaria (iii) Dominant diploid
sporophyte alternating with reduced
gametophyte called prothallus
(d) Cycas (iv) Dominant haploid leafy
gametophyte alternating with
partially dependent multicellular
sporophyte
Choose the correct answer from the
options given below :
(1) (a)-(iii), (b)-(iv), (c)-(i),
(d)-(ii)
(2) (a)-(ii), (b)-(iv), (c)-(i),
(d)-(iii)
(3) (a)-(iv), (b)-(i), (c)-(ii),
(d)-(iii)
(4) (a)-(ii), (b)-(iii), (c)-(iv),
(d)-(i)
37. Which part of the fruit, labelled in the
given figure makes it a false fruit?
(1) C → Thalamus
(2) D → Seed
(3) A → Mesocarp
(4) B → Endocarp
38. Which one of the following will accelerate
phosphorus cycle?
(1) Weathering of rocks
(2) Rain fall and storms
(3) Burning of fossil fuels
(4) Volcanic activity
39. Match List-I with List-II.
List-I List-II
(a) Metacentric chromosome (i) Centromere situated close to the end forming one extremely short and one very long arms
(b) Acrocentric chromosome (ii)
Centromere at the terminal end
(c) Submetacentric (iii) Centromere in
the middle forming two equal arms of
chromosomes
(d) Telocentric chromosome (iv) Centromere slightly away from the middle forming one shorter arm and one longer arm
Choose the correct Ans: from the
options given below :
(1) (a)-(ii), (b)-(iii), (c)-(iv),
(d)-(i)
(2) (a)-(i), (b)-(ii), (c)-(iii),
(d)-(iv)
(3) (a)-(iii), (b)-(i), (c)-(iv),
(d)-(ii)
(4) (a)-(i), (b)-(iii), (c)-(ii),
(d)-(iv)
40. The anatomy of springwood shown some
peculiar features. Identify the correct set of statements about springwood.
(a) It is also called as the earlywood
(b) In spring season cambium produces
xylem elements with narrow vessels
(c) It is lighter in colour
(d) The springwood along with
autumn wood shown alternate concentric rings forming annual rings
(e) It has lower density
Choose the correct answer from the
options given below :
(1) (a), (b) and (d) Only
(2) (c), (d) and (e) Only
(3) (a), (b), (d) and (e) Only
(4) (a), (c), (d) and (e) Only
Ans: (4)
41. Given below are two statements : one is
labelled as
Assertion (A) and the other is
labelled as Reason (R).
Assertion (A) : Mendel’s law of
Independent assortment does not hold good for the genes that are located
closely on the same chromosome.
Reason (R) : Closely located genes
assort independently.
In the light of the above statements,
choose the correct Ans: from the options given below:
(1) (A) is correct but (R) is not
correct
(2) (A) is not correct but (R) is
correct
(3) Both (A) and (R) are correct and
(R) is the correct explanation of (A)
(4) Both (A) and (R) are correct but
(R) is not the correct explanation of (A)
42. Read the following statements on lipids
and find out correct set of statements:
(a) Lecithin found in the plasma
membrane is a glycolipid
(b) Saturated fatty acids possess one
or more c = c bonds
(c) Gingelly oil has lower melting
point, hence remains as oil in winter
(d) Lipids are generally insoluble in
water but soluble in some organic solvents
(e) When fatty acid is esterified
with glycerol, monoglycerides are formed
Choose the correct answer from the
option given below:
(1) (c), (d) and (e) only
(2) (a), (b) and (d) only
(3) (a), (b) and (c) only
(4) (a), (d) and (e) only
43. What is the role of large bundle sheath cells found around the vascular bundles in C4 plants?
(1) To enable the plant to tolerate
high temperature
(2) To protect the vascular tissue
from high light intensity
(3) To provide the site for
photorespiratory
(4) To increase the number of
chloroplast for the operation of Calvin cycle
44. In the following palindromic base
sequences of DNA, which one can be cut easily by particular restriction enzyme?
(1) 5'CTCAGT3; 3GAGTCA5'
(2) 5'GTATTC3; 3CATAAG5'
(3) 5'GATACT3; 3CTATGA5'
(4) 5'GAATTC3; 3CTTAAG5'
45. The entire fleet of buses in Delhi were
converted to CNG from diesel. In reference to this, which one of the following
statements is false?
(1) It is cheaper than diesel
(2) It can not be adulterated like
diesel
(3) CNG burns more efficiently than
diesel
(4) The same diesel engine is used in
CNG buses making the cost conversion low
46. Addition of more solutes in a given solution
will :
(1) make its water potential zero
(2) not affect the water potential at all
(3) raise its water potential
(4) lower its water potential
47. Transposons can be used during which one
of the following ?
(1) Autoradiography
(2) Gene sequencing
(3) Polymerase Chain Reaction
(4) Gene Silencing
48. While explaining interspecific interaction of population, (+) sign is assigned for beneficial interaction, (–) sign is assigned for detrimental interaction and (0) for neutral interaction. Which of the following interactions can be assigned (+) for one specifies and (–) for another specifies involved in the interaction ?
(1) Commensalism
(2) Competition
(3) Predation
(4) Amensalim
49. If a geneticist uses the blind approach for sequencing the whole genome of an organism, followed by assignment of function to different segments, the methodology adopted by him is called as :
(1) Expressed sequence tags
(2) Bioinformatics
(3) Sequence annotation
(4) Gene mapping
50. Which of the following occurs due to the
presence of autosome linked dominant trait ?
(1) Haemophilia
(2) Thalessemia
(3) Sickle cell anaemia
(4) Myotonic dystrophy