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TLS Online TPP Program

#Question id: 15656

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. Explain the two regulatory pathways for Mel1 that can explain the behavior of the MelA– and MelB– mutations. For each regulatory pathways what is a role for the inducer melibiose?

#SCPH06 I Botany
  1. melibiose and MelB both have a net negative effect on Mel1 activity, and MelA has a net positive effect on Mel1 activity.
  2. melibiose and MelB both have a net positive effect on Mel1 activity, and MelA has a net negative effect on Mel1 activity.
  3. melibiose and MelB both have a net positive effect on Mel1 activity, and MelA also has a net positive effect on Mel1 activity.
  4. melibiose and MelB both have a net negative effect on Mel1 activity, and MelA also has a net negative effect on Mel1 activity.
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TLS Online TPP Program

#Question id: 1592

#SCPH01 Biochemistry

Which of these molecules is incorrectly paired with a source?
TLS Online TPP Program

#Question id: 4379

#SCPH05 I Biotechnology

Bromodomains are found in chromosome-associated proteins that contribute to transcriptional activation. To facilitate this activation, the bromodomains bind to histones, specifically their lysine residues that have been post-translationally modified by:
TLS Online TPP Program

#Question id: 3883

#SCPH06 I Botany

Which of the following is correct about reverse transcriptase:
TLS Online TPP Program

#Question id: 15698

#SCPH05 I Biotechnology

Which of the following does not describe global alignment algorithm?
TLS Online TPP Program

#Question id: 3860

#SCPH06 I Botany

Guide RNAs: