In sea urchins, the "fast block" and the longer lasting "slow block" to polyspermy, respectively, are ________.

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#Question id: 14736

#SCPH05 I Biotechnology

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: 14736

#SCPH06 I Botany

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

#SCPH05 I Biotechnology

Which structures are involved in formation of biofilms

TLS Online TPP Program

#Question id: 14737

#SCPH06 I Botany

Which structures are involved in formation of biofilms

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#Question id: 14741

#SCPH05 I 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

#SCPH05 I 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 k_pA =0.38 and k_pB= 0.15. If the eluting flow rate is 0.7 I/h, what is the retention time for each hormone?