Coprophagy is important for the nutritional balance of ________.

TLS Online TPP Program

#Question id: 15658

#SCPH01 Biochemistry

You are studying a new strain of E. coli that can utilize the disaccharide melibiose very efficiently. You find that utilization depends on the enzyme melibiase, which is encoded by the gene Mel1. Mel1 is not expressed unless melibiose is present in the growth medium.

Next, you isolate a third mutant, MelC–, which gives constitutive melibiase expression. The MelC– mutation is closely linked to Mel1 and MelB–. Genetic tests of the MelC– mutation yield the following:

 

As above, classify the MelC– mutation in terms of its basic genetic properties and explain how you arrived at your conclusions.

TLS Online TPP Program

#Question id: 15658

#SCPH06 I Botany

You are studying a new strain of E. coli that can utilize the disaccharide melibiose very efficiently. You find that utilization depends on the enzyme melibiase, which is encoded by the gene Mel1. Mel1 is not expressed unless melibiose is present in the growth medium.

Next, you isolate a third mutant, MelC–, which gives constitutive melibiase expression. The MelC– mutation is closely linked to Mel1 and MelB–. Genetic tests of the MelC– mutation yield the following:

 

As above, classify the MelC– mutation in terms of its basic genetic properties and explain how you arrived at your conclusions.

TLS Online TPP Program

#Question id: 15661

#SCPH12 I Genetics

Which of the following is NOT true of a maternal effect gene?

TLS Online TPP Program

#Question id: 15666

#SCPH12 I Genetics

Which of the following could NOT be used to describe a sex limited trait:

TLS Online TPP Program

#Question id: 15668

#SCPH12 I Genetics

How is genetic transfer different from sexual reproduction?

TLS Online TPP Program

#Question id: 15669

#SCPH12 I Genetics

 Which of the following is a description of generalized transduction?