Heterophyllous development in response to environment is an example of which of the following phenomena ?
1. Dedifferentiation
2. Elasticity
3. Redifferentiation
4. Plasticity
Subtopic:  Development |
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In racemose inflorescence, __________________.
1. the main axis terminates in a flower
2. the growth is limited
3. flowers are borne in an acropetal succession
4. flowers are solitary
Subtopic:  Inflorescence |
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Which one of the following disorders is caused by the substitution of Glutamic acid (Glu) by Valine (Val) at the sixth position of the beta globin chain of the haemoglobin molecule?
1. Haemophilia
2. Thalassemia
3. Sickle-cell anaemia
4. Phenylketonuria
Subtopic:  Mendelian Disorders: Sickle Cell Anemia |
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Match List-I with List-II:
List-I List-II
A. Incomplete dominance I. Human skin colour
B. Co-dominance II. Inheritance of flower colour in Antirrhinum sp.
C. Pleiotropy III. Phenylketonuria disease in humans
D. Polygenic inheritance IV. ABO blood groups
Choose the correct answer from the options given below:
1. A-II, B-IV, C-III, D-I
2. A-I, B-III, C-II, D-IV
3. A-II, B-I, C-III, D-IV
4. A-I, B-IV, C-III, D-II
Subtopic:  Miscellaneous |
 81%
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Arranging the following in the correct developmental sequence related to microsporogenesis:
A. Microspore tetrads
B. Sporogenous tissue
C. Pollen grains
D. Pollen mother cells
Choose the correct answer from the options given below:
1. D, A, C, B
2. B, D, C, A
3. B, D, A, C
4. A, D, C, B
Subtopic:  Stamen: Microsporangium |
 76%
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Arrange the following steps of DNA fingerprinting in a correct sequence.
A. Isolation of DNA and its digestion by restriction endonucleases.
B. Hybridisation using a labelled VNTR probe.
C. Transferring of separated DNA fragments to synthetic membranes.
D. Detection of hybridised DNA fragments by autoradiography.
E. Separation of DNA fragments by electrophoresis.
Choose the correct answer from the options given below:
1. A, E, C, B, D
2. A, E, B, C, D
3. A, B, D, C, E
4. A, D, B, E, C
Subtopic:  DNA Fingerprinting |
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Exploring molecular, genetic and species-level diversity for products of economic importance is called:
1. Biomagnification
2. Biofortification
3. Bioremediation
4. Bioprospecting
Subtopic:   Biodiversity Conservation |
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Which of the following statements are true with reference to the sex-determination in honeybees?
A. An offspring formed from the union of a sperm and an egg, develops as a female (queen or worker).
B. An unfertilized egg develops as a male by parthenogenesis.
C. A male has half the number of chromosomes than that of a female.
D. Males produce sperm by meiosis.
E. Honeybees have a haplodiploid sex-determination system.
Choose the correct answer from the options given below:
1. B, C, D and E only
2. A, B, C and D only
3. A, B, D and E only
4. A, B, C and E only
Subtopic:  Sex Determination |
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Identify the correct sequence of steps in each cycle of Polymerase Chain Reaction :
1. Denaturation → Annealing → Extension
2. Denaturation → Extension → Annealing
3. Extension → Annealing → Denaturation
4. Annealing → Denaturation → Extension
Subtopic:  Polymerase Chain Reaction: PCR |
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Which of the following statements are correct with respect to DNA separation, isolation and visualization ?
A. The cutting of DNA is done by molecular scissors.
B. The DNA fragments separate according to their size in an agarose gel, upon electrophoresis.
C. The separated DNA fragments can be seen without staining when exposed to UV light.
D. The separated DNA fragments, when stained with ethidium bromide, can be seen in visible light.
Choose the correct answer from the options given below:
1. A and D only 2. B and D only
3. B and C only 4. A and B only
Subtopic:  Separation and Isolation of DNA fragments |
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