Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 11238
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:

#Section 2: General Biology

  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.

More Questions
TLS Online TPP Program

#Question id: 14359

#Section 5: Bioprocess Engineering and Process Biotechnology

How many enzyme units are there in 1 katal? 
TLS Online TPP Program

#Question id: 12997

#Section 2: General Biology

Which of the given reason is correct to minimize the repulsion in an α-helix
a) positively charged amino acids are often found near the amino terminus of the helical segment
b) negatively charged amino acids are often found near the amino terminus of the helical segment
c) positively charged amino acids are often found near the C-terminus of the helical segment.
d) negatively charged amino acids are often found near the C-terminus of the helical segment.
TLS Online TPP Program

#Question id: 4132

#Section 3: Genetics, Cellular and Molecular Biology

In E. coli, aminoacyl-tRNA synthetases:
TLS Online TPP Program

#Question id: 17210

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology

which one of the following tools can reliably establish an evolutionary link between two proteins and align them even if they share very low degree of sequence similarity?
TLS Online TPP Program

#Question id: 10136

#Section 2: General Biology

A protein complex contain a Rieske protein known as