TLS Online TPP Program

#Question id: 563


Both water and glucose share an —OH that can serve as a substrate for a reaction with the terminal phosphate of ATP catalyzed by hexokinase.  Glucose, however, is about a million times more reactive as a substrate than water.  The best explanation is that:

#I Life Science/ Life Sciences Group – I-V
  1. glucose has more —OH groups per molecule than does water.

  2. the larger glucose binds better to the enzyme; it induces a conformational change in hexokinase that brings active-site amino acids into position for catalysis.

  3. the —OH group of water is attached to an inhibitory H atom, while the glucose —OH group is attached to C.

  4. water and the second substrate, ATP, compete for the active site resulting in a competitive inhibition of the enzyme.

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TLS Online TPP Program

#Question id: 474

#SCPH05 I Biotechnology

Glycolysis in the erythrocyte produces pyruvate that is further metabolized to:

TLS Online TPP Program

#Question id: 27195

#SCPH05 I Biotechnology

the rate constant for a first order reaction is 2 x 10-2min-1 the half-life period of reaction is

TLS Online TPP Program

#Question id: 23168

#SCPH06 I Botany

What are the advantages of using secondary antibodies in indirect immunofluorescence?
1.  It makes easy to choose a different conjugate no matter the primary antibody
2. Enhance detection by localizing more conjugate at the antigen
3. Conjugation of fluorophore can interfere with the primary antibody’s recognition of the antigen
Which of the following options is correct?

TLS Online TPP Program

#Question id: 11272

#SCPH06 I Botany

Measurement of phytoplankton production, take sample of phytoplankton suspended in three bottles in lake. One bottle as control assumed as initial, second bottle (D) was kept in dark while third bottle (L) was kept in light. After some time productivity measure fallow

A- Difference in dissolved oxygen between light bottle and dark bottle yield NET primary productivity

B- Difference in dissolved oxygen between light bottle and initial bottle yield NET primary productivity

C- Difference in dissolved oxygen between light bottle and initial bottle yield Grass primary productivity

D- Difference in dissolved oxygen between light bottle and dark bottle yield total oxygen produced by photosynthesis

Which above combination of statement are correct?

TLS Online TPP Program

#Question id: 4727

#SCPH12 I Genetics

if mendal had studied the seven trait using a plant with 12 chromosome instead of 14, in what manner would his interpretation have been different ?