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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:

#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.

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TLS Online TPP Program

#Question id: 1835

#Section 2: General Biology

The HIV nef protein affects antigen presentation by:
TLS Online TPP Program

#Question id: 3559

#Section 3: Genetics, Cellular and Molecular Biology

Homozygous yellow was crossed with green seed plant. All F1 offspring having yellow seed plant were allowed to self fertilization to produced F2 plant. Further F2 plant self fertilized. What is phenotype ratio in F3 generation?
TLS Online TPP Program

#Question id: 16781

#Section 1: Engineering Mathematics

At Dunkin Donuts the number of donut holes in a bag can vary. Help Donald find the mode. 12,10,10,10,13,12,11,13,10
TLS Online TPP Program

#Question id: 5258

#Section 3: Genetics, Cellular and Molecular Biology

Which of the following processes are not correct for conjugation?
TLS Online TPP Program

#Question id: 4810

#Section 3: Genetics, Cellular and Molecular Biology

In a haploid organism, the C and D loci are 8 m.u. apart. From a cross C d X c D, which of the following proportion following progeny classes: (a) C D; (b) c d; (c) C d