Competitive Exams: Revision Terminology Part 25

Get top class preparation for competitive exams right from your home: get questions, notes, tests, video lectures and more- for all subjects of your exam.

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