Recent questions tagged botany

Photosynthetic Active Radiation (PAR) has the following range of wavelengths

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Which of the following is not true for a species -

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Why is vivipary an undersirable character for annual crop plants -

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A woman with normal vision, but whose father was colour bind, marries a colour blind man. Suppose that the fourth child of this couple was a boy. This boy -

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More than 70% of world's fresh water is contained in –

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In order to find out the different types of gametes produced by a pea plants having the genotype AaBb, it should be crossed to a plant with the genotype -

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Telomerase is an enzyme which is a -

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Three crops that contribute maximum to global food grain production are -

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Which one of the following represents an ovule, where the embryo sac becomes horse- shoe shaped and the funiculus and micropyle are close to each other -

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Animals have the innate ability to escape from predation. Examples for the same are given below. Select the incorrect example

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Which one of the following hydrolyses internal phosphodiester bonds in a polynucleotide chain-

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The salivary gland chromosomes in the dipteran larva, are useful in gene mapping because -

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The net pressure gradient that causes the fluid to filter out of the glomeruli into the capsule is -

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One of the most important functions of botanical gardens is that -

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Which of the following is generally used for induced mutagenesis in crop plants -

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Chemiosmotic theory of ATP synthesis in the chloroplasts and mitochondria is based on

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Using imprints from a plate with complete medium and carrying bacterial colonies, you can select streptomycin resistant mutants and prove that such mutations do not originates as adaptation. These imprints need to be used -

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Match items in Column I with those in Column II - Column I Column II s - (A) Peritrichous (J) Ginkgo flagellation (B) Living fossil (K) Macrocystes (C) Rhizophore (L) Escherichia coli (D) Smallest flowering plant (M) Selaginella (E) Largest (N) Wolffia Perennial alga Select the correct answer with the following

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At a particular locus, frequency of 'A' allele is 0.6 and that of 'a' is 0.4. What would be the frequency of heterozygotes in a random mating population at equilibrium -

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All of the following statements concerning the Actinomycetous filamentous soil bacterium Frankia are correct EXCEPT that Frankia -

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In a type of apomixis known as adventive embryony, embryos develop directly from the -

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Golden rice is a transgenic crop of the future with the following improved trait -

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Which one of the following pairs in mismatched-

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Which of the following represents the edible part of the fruit of Litchi -

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G-6-P dehydrogenase deficiency is associated with haemolysis of -

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Ectophloic siphonostele is found in -

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During which stage in the complete oxidation of glucose are the greatest number of ATP molecules formed from ADP -

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The ability of the Venus Flytrap to capture insects is due to -

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Potometer works on the principle of -

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A man and a women, who do not show any apparent signs of a certain inherited disease, have seven children (2 daughter and 5 sons). Three of the sons suffer from the given disease but none of the daughters are affected. Which of the following mode of inheritance do you suggest for this disease

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A women with 47 chromosomes due to three copies of chromosome 21 is characterized by -

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In which one pair both the plants can be vegetatively propagated by leaf pieces -

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Which one of the following pairs in mismatched-

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Chlorophyll in chloroplasts is located in -

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The main organelle involved in modification and routing of newly synthesized proteins to their destinations is -

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At what stage of the cell cycle are histone proteins synthesized in a eukaryotic cell -

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Photosynthesis in $C_4$ plants is relatively less limited by atmospheric $CO_2$ levels because

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Which of the following is not a hereditary disease -

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In a woody dicotyledonous tree, which of the following parts will mainly consist of primary tissues -

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There exists a close association between the alga and the fungus within a lichen. The fungus -

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According to widely accepted "fluid mosaic model" cell membranes are semi-fluid, where lipids and integral proteins can diffuse randomly. In recent years, this model has been modified in several respects. In this regard, which of the following statements are incorrect -

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Centromere is required for -

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Protein synthesis in an animal cell occurs -

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Top-shaped multiciliate male gametes, and the mature seed which bears only one embryo with two cotyledons, are characteristic features of -

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The name of Norman Borlaug is associated with-

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Auxospores and hormocysts are formed respectively, by -

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Secretin and cholecystokinin are digestive hormones. They are secreted in -

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As compared to a $C_3$-plant, how many additional molecules of ATP are needed for net production of one molecule of hexose sugar by $C_4$-plants -

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A student wishes to study the cell structure under a light microscope having 10X eyepiece and 45X objective. He should illuminate the object by which one of the following colours of light so as get the best possible resolution -

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Which one of the following makes use of RNA as a template to synthesize DNA -

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