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19 Mar 2009 20:50:44 IST
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hi guyz.. maybe u have seen the enormous sucess of the inorganic thread...so, i'm starting this here.... all we have to do is keep on posting new quesns after giving answers to previous ones.....even if the answer is known to u.. let me start wid the quesn... bacteria also produce ATP like eukarya.. and it also uses proton gradient for converting ADP to ATP ... mitochondria pumps it into the perimitochondrial space... my quesn is.. where does the bacteria pump the H+ ions from its matrix.... options will be given 2morow if no one is able to answer....
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size doesnt matter, brains do...
vignesh, MAMC |
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I think in bacteria the protons are accumulated between the cell membrane and the cell wall. So, the proton should enter from this gap into the cytoplasm......correct me if i am wrong.
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19 Mar 2009 22:34:37 IST
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Its matrix means cytoplasmic matrix or mitochondrial matrix ???
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20 Mar 2009 20:17:02 IST
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yep.... answer by jps is right... space b/w cell wall and cell membrane... and bacteria doesnt have mitochondria.. so, it must be cytoplasmic matrix.....
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20 Mar 2009 20:31:48 IST
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Some que related to genetics.......... 1. If a chiasma forms etween the loci of genes A and B in 20% of the tetrads of an individual of genotype AB/ab, the percentage of gametes expected to be Ab is a. 5 b. 10 c. 20 d. 40 2.Cis-trans expression of genes is an example of ............. (This is a doubt). Also explain what is CHIMAERA? 3.If 4 chromosomes synapse into a cross- shaped config. during meiotic prophase, the prganism is heterozygous for a a. deletion b. pericentric inversion c. translocation d. paracentric inversion 4.A ring of 3 chromosomes and 6 bivalents are observed in pea plant. What type of cytological abnormality is present in this plant? It is a. triploid b. primary trisomic c. secondary trisomic d. inversion homozygote 5. Which of the following will cause more effective mutation? a. one codon b. one base deletion c. base substitution d. base deamination
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20 Mar 2009 20:42:02 IST
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for 1st, i think answer is 10 % .. i.e out of the 20 % recombinant gametes, 10% will be Ab and other 10% will be aB ... for 2nd...cis expression of gene ..AB/ab and trans expression of gene = Ab / aB chimaera is some mythological creature which has mixture of traits.. like claws of lion, wings of eagle or something like that... u can call it as an organism created by mixing many organism... hence, chimaeric DNA is the one which has DNA of some other organism too mixed with DNA of a particular organism.. eg. in Bt cotton.. for quesn 5.. answer wud be 1 base deletion as the amino acid sequence will be changed ... EDITED .. sorry for the 1st one.. my answer for 1st is wrong... for the first one, answer shud be 5% ... because it is given 20% of tetrad and not 20% chromosomes show recombination .... and in tetrad, out of 4 chromatids, only 2 recombine... so, answer shude be 20 / 2 = 10% recombination value... and that means 5% is Ab and other 5 % is aB
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size doesnt matter, brains do...
vignesh, MAMC |
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20 Mar 2009 22:58:10 IST
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The chemicals used in the scanning process of a object by a Scanning Electron Microscope ( SEM ) are ------> 1. formaldehyde and acetone 2. propane and formaldehyde 3. propane and alcohol 4. ethane and acetone. [Ans will be given 2mrw night......] ....plz try dis...
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21 Mar 2009 10:46:26 IST
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ethanol nd acetone r used to prevent the collapse of the sample while undergoin dehydration. Formaldehyde is also used for the fixation of the sample. The correct option would have to be (d).
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Guys...go for trial-n-error..u'll be happy u tried, n the gals will point out the error ;) |
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21 Mar 2009 10:47:21 IST
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wait.....(d) gives ethane.... should be (a) then.
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Guys...go for trial-n-error..u'll be happy u tried, n the gals will point out the error ;) |
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21 Mar 2009 20:56:43 IST
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No,,,, the ans is (3)propane and alcohol.
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26 Mar 2009 23:44:28 IST
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quesn.. how many ATP are need to fix 2 CO2 molecules by hatch and slack pathway.. options .. 10 , 6 , 4 , 2
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27 Mar 2009 07:40:02 IST
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5 molcules for each CO2 fixed, so in total 10 for 2 molecules.
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27 Mar 2009 20:58:49 IST
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silk thread is produced by adult moths caterpillar pupa imagorichest source pf protein is egg milk fish chicken this one is viral disease in silk wormmaggot diseaseflacheriepebrine disease muscurdine what are other names of maggot disease
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29 Mar 2009 11:38:23 IST
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hey JPS bro.. see how u and i did same mistake.... for the above quesn, which u answered..answer is 4 CO2... now, again read the quesn.. answer will be clear why it is.. i also gave answer as 10 CO2... and got -1 marks for that..
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29 Mar 2009 12:16:44 IST
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10silk thread is produced by 1 adult moths 2 caterpillar 3 pupa 4imago 11 richest source pf protein is 1egg 2 milk 3 fish 4 chicken 12 this one is viral disease in silk worm 1maggot disease 2flacherie 3 pebrine disease 4muscurdine what are other names of maggot disease
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29 Mar 2009 16:30:31 IST
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quesn 10.. silk threads are produced by silk glands of caterpillar while undergoing the initial stages of metamorphosis.. quesn 11 ... i think fish is the richest source...only a guess... quesn 12.. flacherie is a viral disease.... maggot = caterpillar = grub = earwig ..all these are not exactly synonyms.. but they all represent the larval stages on some flying and related insects...
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size doesnt matter, brains do...
vignesh, MAMC |
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30 Mar 2009 12:02:55 IST
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another quesn which of the following steps dont occure in cytoplasm of gurad cel during stomatal opening.. 1. decrease in pH of ctoplasm 2. PEP + CO2 ----> OAA 3. OAA + NADPH2 ----> malic acid + NADP 4. synthesis of PEP from starch by multistep process
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size doesnt matter, brains do...
vignesh, MAMC |
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30 Mar 2009 12:19:56 IST
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i think its 1 bcoz during opening there is increase in cytoplasmic pH.
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30 Mar 2009 13:34:39 IST
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for que12 flacherie is bacterial disease is n't i t help me out,,,,,,,,,,,in some books ans given is flacherie in some other books ans given is maggot diseaese.............
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9 Apr 2009 23:15:40 IST
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flacherie is a viral disease.. i'm sure abt it.... hey.. okay.. a very good quesn..u wudnt believe i came across this one in NCERT.. which one of the following hormones results in enormous internodal elongation in deep water rice plant?? 1) Auxin ..2) gibberelin ..3) cytokinin .. 4) ethylene ....
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