Practice Questions

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:

#XL - Q Biochemistry

glucose has more —OH groups per molecule than does water.
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.
the —OH group of water is attached to an inhibitory H atom, while the glucose —OH group is attached to C.
water and the second substrate, ATP, compete for the active site resulting in a competitive inhibition of the enzyme.

More Questions

#Question id: 4207

#XL - T Zoology

If there is more globin than heme present in a reticulocyte, globin synthesis is stopped by

#Question id: 4161

#XL - T Zoology

The link between an activated amino acid and tRNA is an __ bond between the __ of the amino acid and a hydroxyl group of the tRNA.

#Question id: 27262

#XL - U Food Technology

#Question id: 3480

#XL - T Zoology

Which of the following statements about learning and behavior is correct?

A) Operant conditioning involves associating a behavior with a reward or punishment.

B) Associative learning involves linking one stimulus with another.

C) Behavior can be modified by learning, but some apparent learning is due to maturation.

D) Imprinting is a learned behavior with an innate component acquired during a sensitive period.

#Question id: 1041

#XL - T Zoology

The lactobacilli, in their role as normal flora of the vagina, help the vagina resist infection by contributing to