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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:

#SCPH06 I Botany

  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: 20100

#SCPH05 I Biotechnology

Ice — Water mass ratio is maintained as 1 : 1 in a given system containing water in equilibrium with ice at constant pressure. If CP (ice) = CP (water) = 4.18 J mol-1 K-1 molar heat capacity of such a system is 
TLS Online TPP Program

#Question id: 40

#SCPH01 Biochemistry

Given that the standard free-energy change for the reaction glucose + Pi → glucose 6-phosphate is 13.8 kJ/mol, and the standard free-energy change for the reaction ATP → ADP + Pi is −30.5 kJ/mol, what is the free-energy change for the reaction glucose + ATP → glucose 6-phosphate + ADP?
TLS Online TPP Program

#Question id: 1772

#SCPH01 Biochemistry

J chain is present in?
TLS Online TPP Program

#Question id: 2628

#SCPH05 I Biotechnology

Choose true statement about lac repressor;
TLS Online TPP Program

#Question id: 2138

#SCPH28 | Zoology

Integrins are