You are studying regulation of the yeast enzyme glutamine synthetase (GS), which is encoded by the GLN1 gene. You have isolated two mutants, designated gln2– and gln3–, that give decreased GS activity. Mating of either gln2– or gln3– haploids to wild type produces heterozygous diploids that show normal amounts of GS expression. When you cross either a gln2– or gln3– haploid to a gln1– strain the resulting diploids show normal expression of GS.              

How many units of ß-galactiosidase would you expect to be expressed from deletion 1 in a gln2– mutant? 

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#Question id: 580

#Unit 1. Molecules and their Interaction Relevant to Biology

In a first order chemical reaction, the velocity of the reaction is proportional to the ________, while in a zero order reaction, the velocity of the reaction is proportional to the ________.

TLS Online TPP Program

#Question id: 581

#Unit 1. Molecules and their Interaction Relevant to Biology

The main difference between chemical and enzyme kinetics is that

TLS Online TPP Program

#Question id: 582

#Unit 1. Molecules and their Interaction Relevant to Biology

When two different substrates react to form two different products, the rate constants for each separate substrate can be determined by

TLS Online TPP Program

#Question id: 583

#Unit 1. Molecules and their Interaction Relevant to Biology

When there are two substrates in a reaction, the reaction is said to be second order if ________.

TLS Online TPP Program

#Question id: 584

#Unit 1. Molecules and their Interaction Relevant to Biology

The non-enzymatic hydrolysis of sucrose into glucose and fructose is an example of a pseudo first-order reaction because

TLS Online TPP Program

#Question id: 585

#Unit 1. Molecules and their Interaction Relevant to Biology

In an enzyme reaction involving one enzyme and one substrate, the rate of the reaction depends on