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TLS Online TPP Program

#Question id: 10131

The detailed chemical mechanism of the oxidation of water to O2 is not yet well understood, but with structural information shows_one electron carrier, generally identified as Yz, functions between the oxygen-evolving complex and P680 to function in this region, Yz needs to have a very strong tendency to retain its electrons, this species has been identified as;

#Section 2: General Biology
  1. A radical formed from a tyrosine residue in the D1 protein of the PSII reaction center
  2. Formed from Aromatic amino acid residue in the D2 protein of the PSII reaction center
  3. A radical formed from a Histidine residue because of its +ve charge in the D1 protein of the PSII reaction center
  4. A radical formed from a tyrosine residue in the D2 protein of the PSII reaction center
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TLS Online TPP Program

#Question id: 14734

#Section 2: General Biology

Among the following which bacteria shows corkscrew movement?
1. Treponema pallidum
2. Leptospira
3. Borrelia burgdorferi
4. Brachyspira pilosicoli
Which among the following combination is correct?
TLS Online TPP Program

#Question id: 14735

#Section 2: General Biology

Large surface are a to volume ratio of bacterial cell give advantage for
TLS Online TPP Program

#Question id: 14736

#Section 2: General Biology

In basal structure of flagella of gram positive bacteria?
1. L
2. P
3. S
4. M
Which combination is not found in above bacteria? Choose the option with both incorrect rings.
TLS Online TPP Program

#Question id: 14737

#Section 2: General Biology

Which structures are involved in formation of biofilms
TLS Online TPP Program

#Question id: 14741

#Section 5: Bioprocess Engineering and Process Biotechnology

Microbial cell recovery is carried out in a continuous disc-stack centrifuge. The centrifuge is operated at 5000 rpm for separation of baker's yeast. At a feed rate of 60 1/min, 50% of the cells are recovered. At constant speed, solid recovery is inversely proportional to flow rate. What operating speed is required to recover 90% of cells if the flow rate in the centrifuge is maintained at 601/min? 
TLS Online TPP Program

#Question id: 14742

#Section 5: Bioprocess Engineering and Process Biotechnology

Gel chromatography is used for hormone separation. A pilot-plant scale gel chromatography column packed with sephacryl resin is used to separate two hormones, A and B. The column is 5 cm in diameter and 30 cm in height: V, = 1.9x 10-4m3, Wr = 3x10-3m3 /kg dry sephacryl, ps =1.25 x 103 kg/m3 . The partition coefficients are kpA =0.38 and kpB= 0.15. If the eluting flow rate is 0.7 I/h, what is the retention time for each hormone?