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TLS Online TPP Program

#Question id: 4169

The first amino acid incorporated into proteins __.

#SCPH06 I Botany

  1. can be any of the 20 standard amino acids

  2. is an N-formylmethionine in E. coli and methionine in other organisms

  3. is always inosinate

  4. is an amidated methionine residue that is cleaved following termination of translation

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TLS Online TPP Program

#Question id: 15656

#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. 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?
TLS Online TPP Program

#Question id: 11676

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

In humans, the transport epithelial cells in the ascending loop of Henle:
TLS Online TPP Program

#Question id: 295

#SCPH05 I Biotechnology

Which of the following pairs of amino acids could form a covalent disulfide bond to link two polypeptides together in a multi-subunit protein complex
TLS Online TPP Program

#Question id: 2923

#SCPH28 | Zoology

Injection of an immature Xenopus oocyte with MPF induces:
TLS Online TPP Program

#Question id: 3022

#SCPH28 | Zoology

Late log phase of the bacterial growth curve