Practice Questions

TLS Online TPP Program

#Question id: 552

Which of the following is true of the binding energy derived from enzyme-substrate interactions?

#I Life Science/ Life Sciences Group – I-V

It cannot provide enough energy to explain the large rate accelerations brought about by enzymes.
It is sometimes used to hold two substrates in the optimal orientation for reaction.
It is the result of covalent bonds formed between enzyme and substrate.
Most of it is derived from covalent bonds between enzyme and substrate.

More Questions

TLS Online TPP Program

#Question id: 1117

#SCPH01 Biochemistry

At puberty, an adolescent female body changes in both structure and function of several organ systems, primarily under the influence of changing concentrations of estrogen and other steroid hormones. How can one hormone, such as estrogen, mediate so many effects?

TLS Online TPP Program

#Question id: 844

#SCPH05 I Biotechnology

It is a given set of conditions that are required for the maintenance of the active set of cellular proteins

TLS Online TPP Program

#Question id: 3873

#SCPH05 I Biotechnology

The excision (splicing) of many group I introns requires, in addition to the primary transcript RNA:

TLS Online TPP Program

#Question id: 15617

#SCPH01 Biochemistry

Wild type E. coli metabolizes the sugar lactose by expressing the enzyme ß-galactosidase. You have isolated a mutant that you call lac1–, which cannot synthesize ß-galactosidase and cannot grow on lactose (Lac–). During an condition you have a wild type (Lac+) strain carrying a Tn5 insertion known to be near several Lac genes on the E. coli chromosome. You grow P1 phage on this strain and use the resulting phage lysate to infect the lac1– strain, selecting for kanamycin resistance (Kanr). Among 100 Kanr transductants, you find that 82 are Lac– and 18 are Lac+. Express the distance between Tn5 and the lac1– mutation as a cotransduction frequency;