Which of following is true regarding the Transketolase and Transaldolase

a. Transketolase catalyzes the transfer of a two-carbon fragment from a ketose donor to an aldose acceptor with TPP

b. Transketolase catalyzes the transfer of a three-carbon fragment from a ketose donor to an aldose acceptor with TPP

c. Transaldolase catalyses the transfer of a two-carbon fragment

d. Transaldolase catalyses the transfer of a three-carbon fragment

#Question id: 620

#Unit 1. Structure and Function of Biomolecules

Which of the following statements about a plot of V0 vs. [S] for an enzyme that follows Michaelis-Menten kinetics is false?

#Question id: 621

#Unit 1. Structure and Function of Biomolecules

Michaelis and Menten assumed that the overall reaction for an enzyme-catalyzed reaction could be written as Using this reaction, the rate of breakdown of the enzyme-substrate complex can be described by the expression:

#Question id: 622

#Unit 1. Structure and Function of Biomolecules

An enzyme-catalyzed reaction was carried out with the substrate concentration initially a thousand times greater than the Km for that substrate.  After 9 minutes, 1% of the substrate had been converted to product, and the amount of product formed in the reaction mixture was 12 micromol.  If, in a separate experiment, one-third as much enzyme and twice as much substrate had been combined, how long would it take for the same amount (12 micromol) of product to be formed?

#Question id: 623

#Unit 1. Structure and Function of Biomolecules

Which of these statements about enzyme-catalyzed reactions is false?

#Question id: 624

#Unit 1. Structure and Function of Biomolecules

The following data were obtained in a study of an enzyme known to follow Michaelis-Menten kinetics: The Km for this enzyme is approximately:

#Question id: 625

#Unit 1. Structure and Function of Biomolecules

For enzymes in which the slowest (rate-limiting) step is the reaction Km becomes equivalent to: