Page 1 of 2: biochem doubts

zolt · Credits: 9209 My Scrapbook My Reading List 40 Books

1.Schlesinger's test is done to detect :
a.bile pigment
b.hemoglobinuria
c.urobilinogen
d.urobilin

the key says lugol's sol'n transforms urobilinogen to urobilin which then reacts with alcoholic zinc acetate to form greenish fluoresence so the test finally detects urobilin & hence d. is the ans.?

2.the % of bacterial chromosome usually involved in transformation is
1. 1%
2. 10 %
3. 25%
4. 50 to 100%
i have no clues regarding this ans.the key says 10 to 50 would have been an ideal ans.

3.xeroderma pigmentosa is due to deficiency of
1. dna polymerase
2. dna dependent rna polymerase
3. dna ligase
4. specific dna endonuclease
now this is a very oft repeated question but ans varies between 1,3 & 4
plz help

4.daily excretion of iron in urine is
1. nil
2. 0.01 - 0.04 mg
3. 0.06 - 0.1 mg
4. 0.1 - 0.8 mg
now deb says adult male 0.5 to 1.5 mg
satyanaran -iron is not excreted thru urine
plz help

draditithegreat · Credits: 1248020 My Scrapbook

hey Zolt pls put one question per post so as to have systematic discussion!!!!

zolt · Credits: 9209 My Scrapbook My Reading List 40 Books

ok from next time i will do so.but now any of the above questions can be discussed here.its not necessary to discuss all the questions at once.

draditithegreat · Credits: 1248020 My Scrapbook

stiill i suggest u to repost them in 4 different post!!!

bhavu · Credits: 9491 My Scrapbook

in xerderma question answer is 4 see uv mediated damage to dna repain in page 343,2411 in harison 15th, harper 26th 337. you will under stand
on question of iron. i will go for nil.

naina2006 · Credits: 292 My Scrapbook

the answer for deficiency leading to xero pig is excision endonuclease/exinuclease,since the recognition and removal of thymine dimers is primarily affected by this alone.

vimoj · Credits: 27341 My Scrapbook My Reading List 85 Books

shleisinger test if for UROBILIN.
REF BHATIA REVIEW

vimoj · Credits: 27341 My Scrapbook My Reading List 85 Books

PERCENTAGE OF BACTERIAL CHROSOME INVOLVED IN TRANSFORMATION IS 1%
AGAIN ;- REF BHATIA REVIEW

vimoj · Credits: 27341 My Scrapbook My Reading List 85 Books

0.06-0.1mg is the daily excretion of iron in urien... same reference

Bruno · Credits: 45896 My Scrapbook My Reading List 50 Books

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