Recent questions tagged botany

Arrange the various steps of DNA fingerprinting technique in the correct order, i.Separation of DNA fragments by electrophoresis ii.Digestion of DNA by restriction endonucleases iii.Hybridization using VNTR probe iv.Isolation of DNA v.Detection of hybridized DNA fragments by autoradiographing. vi.Transferring separated DNA fragments to nitrocellulose membrane

asked Jan 18, 2017 by meena.p

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Given diagram represents the components of transcription unit. Select the correct answer regarding it.

asked Jan 18, 2017 by meena.p

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Assertion: In pigeons, females are heterogametic and males are homogametic. Reason: In pigeons, females have ZW * chromosomes and males have ZZ * chromosomes.

asked Jan 18, 2017 by meena.p

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Rate of mutation is affected by

asked Jan 18, 2017 by meena.p

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Read the following statements and select the correct option: i. Percentage of homozygous dominant individuals obtained by selfing Aa individuals is $25 \;\%$. ii. Types of genetically different gamete produced by genotypes AABbcc are 2 iii. Phenotypic ratio of monohybrid $F_2$ progeny in case of Mirabilis jalapa is 3:1

asked Jan 18, 2017 by meena.p

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Among the terms listed below, those are not technically correct names for a floral whorl are: $i. Androecium \\ii.Carpel \\ iii. Corolla \\iv.Sepal$

asked Jan 18, 2017 by meena.p

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Scutellum of a grass embryo is

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The embryosac of a typical dicot at the time of fertilization is

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The pollination of two flowers on different plants is known as

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Appearance of vegetative propagules from the nodes of the plants such as sugarcane and ginger is mainly because

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Select the pair that consists of plant growth regulators only

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Assertion: Glycolysis is also called EMP pathway Reason: It is the only process of respiration in aerobic organisms.

asked Jan 18, 2017 by meena.p

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The herbicide DCMU kills the weeds because it inhibits

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When $CO_2$ is added to PEP, the first stable product synthesised is

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Technique of hydroponics was first demonstrated by

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Translocation of photosynthetic end products in sieve tubes is

asked Jan 12, 2017 by meena.p

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Mitosis is characterised by

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Assertion: The number of cells in a multi cellular organism is inversely proportional to body size Reason: All the cells in the biological world are of same size

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The figures of cork cells as seen by Robert Hooke was published in the book

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Satellite of the chromosome is

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Which one of the following dye best suited for staining chromosomes?

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Cells of the tissues are living and show angular wall thickenings. They also provide mechanical support. The tissue is

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Match the following and choose the correct option

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Pineapple fruit develops from

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Parasitic roots are found in

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A fruit developed from a condensed inflorescence

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Edible part of the mango is

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Five kingdom and six kingdom classifications were proposed by _________ respectively

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Hormogonia are vegetative reproductive structures of

asked Jan 11, 2017 by meena.p

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Selaginella and Salvia are considered to represent a significant step towards evolution of seed habit because

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Examine the given figure and select the right option giving all the four parts (a,b,c,d) correctly identified.

asked Jan 11, 2017 by meena.p

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Which one of the following is considered important in the development of seed habit?

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The most names in biological nomenclature of organisms are taken from

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Assertion: A tiger is a rare species. Reason: Tiger population is very small.

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Breeding place of Flamingo (Hamsawar) in India is

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An ecosystem can be easily damaged but can recover afyer sometime if damaging effect stops, will be having

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Which one of the following is most important in water cycle?

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Which one of the following exhibits least productivie?

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Which of the following is a partial root parasite?

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The population growth is generally described by the following equation: $ \large\frac{dn}{dt} =rN\bigg[\large\frac{K-N}{K}\bigg]$ . What does "K" represent in the given equation ?

asked Jan 11, 2017 by meena.p

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Which one of the following statement is incorrect?

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Somatic hybrids in plants were first obtained between the species of ___ by Carlson et al. in 1972.

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Select the correct statement out of the following:

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black rust of wheat is caused by

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In some viruses, DNA is synthesised by using RNA as a template. Such a DNA is called

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An organism uses 20 aminoacids while its DNA is made up of only 6 types of nitrogenous bases. What would be the minimum size of the codon?

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Match column I with Column II and select correct options from the codes given below

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Occasionally, a single gene may express more than one effect. This phenomenon is called

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Haplodiploidy is found in

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Fruit shape in Shepherd’s purse (Capsella bursa) is of two types- triangular and top shaped. Triangular fruit shape (T) is dominant over top shape (t). Following table summarizes the results of the several crosses. Which pair of strains possess genotype Tt?

asked Jan 11, 2017 by meena.p

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