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The fact that a purine base is always paired with hydrogen bonds with a pyrimidine base in the DNA double helix, leads to
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Regulation of gene expression occurs at the level of
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The year $2003$ was celebrated as the $50^{th}$ anniversary of:
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Jan 5, 2017
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Study the two cases carefully. What would be the correct interpretation of the two cases?
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Depending upon the distance between any two genes which is inversely proportional to the strength of the linkage, cross over will vary from
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Among seven pairs of contrasting traits in pea plants as studied by Mendel, the number of traits related to flower pod and seed respectively were
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Polyembryony commonly occurs in
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Both autogamy and geitonogamy are present in
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In angiosperms, the female gametophyte is
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A dandelion produces seeds without meiosis or fertilization. The adult sporophyte forms diploid rather than haploid megaspores that develop into the ovules containing diploid, rather than haploid nuclei. One of the nuclei in each ovule becomes an egg and develops directly without fertilization in an embryo that is geneticall identical to its parent this type of reproduction is called
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The male gametes of rice plant have 12 chromosomes in their nucleus. The chromosome number in the female gamete, zygote and the cells of seedling will be respectively
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Jan 5, 2017
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Photoperiod stimulus is perceived by pigment
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Jan 5, 2017
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Value of RQ in succulents is
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Meiosis results in
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Which of these is a type of phycobilin pigments?
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Jan 5, 2017
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Which light range is most effective in photosynthesis?
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With regard to biological nitrogen fixation by Rhizobium in association with Soyabean, one of the following statements does not hold true.
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Which one of the following will not directly affect transpiration?
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Desmosomes are
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What does A,B and C represent in the given diagram of the chromosome?
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Jan 5, 2017
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Which of the following statements is not true for plasma membrane?
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Jan 5, 2017
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A common characteristic feature of plant sieve tube cells and most of the Mammalian erythrocytes is
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Jan 5, 2017
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Assertion: A vascular cambium is considered as lateral. Reason: It gives rise to lateral roots.
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Jan 5, 2017
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A transverse section of the stem is stained first with the safranin and then with fast green following the usual schedule of double staining for the preparation of a permanent slide. What would be the colour of the stained xylem and phloem?
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Jan 5, 2017
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2
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Select the mismatched pair
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Jan 5, 2017
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How many plants in the list given below have composite fruits that develop from an inflorescence: Walnut, Poppy, Raddish, Fig, Pineapple, Apple, Tomato, Mulberry
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Rearrange the following zones as seen in the root in the vertical section and choose the correct option.Root hair zone B. Zone of meristems C. Root cap zone D. Zone of maturation E. Zone of elongation
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Jan 5, 2017
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Protonema is
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If the chromosome number of a flowering plant is 36. What would be its in endosperm.
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Jan 5, 2017
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Fusion of two gametes that are dissimilar in size are termed as
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A prothallus is
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Which of the following statements about Mycoplasma is wrong?
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Dodo, passenger pigeon and Stellar’s cow became extinct in the last 500 years due to
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Jan 4, 2017
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Lions are found in
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Which of the following is considered as a pioneer community in xerarch?
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Term “Ecosystem” was coined by
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A protozoan reproduces by binary fission. What will be the number of protozoans in its population after six generations?
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Jan 4, 2017
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Percentage of individuals of a given age group in a given population is called
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Jan 4, 2017
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Which one of the following options is correct?
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In plant tissue culture, cytokinins are responsible for the growth of
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Totipotency refers to
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Jan 4, 2017
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2
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First artificial hybrid was obtained by crossing sweet William and Carnation in 1717 by
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Jan 4, 2017
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Which one of the following is most appropriate for sickle cell anaemia?
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Jan 4, 2017
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Match column I with column II and select the correct option from the codes given below.
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Jan 4, 2017
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Which of the phenomenon was proved experimentally byMesselson and Stahl?
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Jan 4, 2017
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In a dihybrid cross, igf you get $9:3:3:1$ ratio it denotes that
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Jan 4, 2017
by
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2
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Given diagram shows a pair of homologus chromosomes during meiosis Maximum crossing over will occur between genes
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Jan 4, 2017
by
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Which of the following characters was not chosen by Mendel?
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Jan 4, 2017
by
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The study of formation, growth and development of a new individual from an egg is known as
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Jan 4, 2017
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Persistant nucellus is called ________ and is found in ______
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Jan 4, 2017
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