ICSE/ISC Board Exam: Revision Terminology Part 25

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  • High auxin concentration – stimulatory for stem
  • High auxin concentration – inhibiroty for root
  • Auxin ⇾ female flower increase & parthmograpy induced
  • IAA promote liberation of water soluble xyloglucan from cell wall.
  • Benzoic acid derivations – powerful weed killer
  • 2 – 4 D – Selective weed killer (kills dicots) , Flowering in litchi, prevents food drop.
  • IBA – induce rooting of cuttings
  • IPA – induce rooting of cutting, natural fruit setting
  • NAA – induce rooting cutting, natural fruit setting, prevent sprouting of polatoes.
  • Gibberllic acid – terepenes, move by xylem sap. Most effective when applied on whole body, in apical of young leaves & roots, stein elongation, break bud dormancy.
  • Bolting of cabbage, promote flower in LDP, increase fruit size & bunch length of grapes.
  • Antigibberllics/growth retardants – maleic hydrazide, phosphon D, chlorocholine chloride (CCC)
  • C + Auxin ➾ cell division in non meristamitic parts also induce inorphogenesis.
  • Ethylene – not move through air spaces induce flowering, ripening, no of female flower , ethephone is broken to relase ethglene in plants.
  • ABA – terpenoids, inhibit mitosis, induce dormancy, stress hormone, regulate fruit drop.
  • Synergism – when combined effect of growth hormone > individual effect.
  • Pea seeds in dark contain a lot ethylene but not in light.
  • Cytokine prevent chl degradation – Richmond Lang effect.
  • Auxanometer – measures growth.
  • Crescograph – measures growth in seconds.
  • Clinostat – eliminate effect of geotropism.
  • Tromatotropism – movement due to injury
  • Auxin & Cytokinin – retaord abscission
  • ABA & ethylene – accelerate abscission
  • Time between perception of stimulus & reaction = presentation time
  • Red region of light is best for seed germination.
  • Infrared region of light is best for seed domains.
  • Senescence
  • Whole plant – whole plant die after seed product, monocarpic, rice, wheat, gram mustone.
  • Sequential – older & latered regions die & apical produces perennial plant.
  • Shoot – aboveground portion dies after producing fruits banana, gladiolus.
  • Simull aneous/Synchronoers-elm, maple – all leaf shed in late autumn (Oct) .
  • Control of development of form by light = morphogenesis (photo)
  • Defoliation of forest tree = 2 – 4 dichlorophynoxy acetic acid
  • Fruit ripening – 80 % C2H4 + 20 % CO2
  • Agent orange – weedicide containing dioxin.
  • Lethal genes are mostly recessive (eg. Thallesemia)
  • Manx cat (without tonil) is heterozygous for dominate allde which cause notail, in homozygous it is lethal
  • Expressivity – intersity of phenotypic expression of genes may
  • Percentages freq with which a gene manifests its phonotypic effect = penetrance
  • Colour of pea, wing of Drosophila = Complete Penetrance, Diabetes milletus = incomplete penetrance.
  • Gene pool = seem of genes in reproduction gametes of popl.
  • Mutation, selection & migration causes changes in genetic drift.
  • Only one Y-chr is sufficient to induce maleness
  • Controlled sex mechanism = melandrium
  • Genes cocated on mitrochondria generally show maternal inheritance
  • Epistatis – dominant of are allele on another allele of both loci
  • Crossing over is resp. for recombination of linked alleles.
  • Bacteria – prokaryotes without ehla.
  • Louis pastear – formder of modern bacteriology
  • Old Cultures of Gm positive bacteria lose the ability to retain crystal violet.
  • Iodine solution act as mordant & help to fix the primary dye to bacteria.
  • If mendel studied the T traits with 12 chr instead of 14 chr he would have disc the law of independent assortment
  • Rain water is free from bacteria Gm negative fail to retain primary crystal violet stain.
  • Bactria flagella – much thinner, rotate round base life propeller hollow, non helical filamentous made of protein pilin.
  • Bacteria – peptidoglycan – N acetyl glucosamine (NAG) & N – acetylmuromic
  • Acid (NAM) held by 1, linkages 4AA – lalanine, D – Glutamic acid, Hysine, D alanine

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