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TLS Online TPP Program

#Question id: 4143

It is possible to convert the Cys that is a part of Cys-tRNACys to Ala by a catalytic reduction.  If the resulting Ala-tRNACys were added to a mixture of (1) ribosomes, (2) all the other tRNAs and amino acids, (3) all of the cofactors and enzymes needed to make protein in vitro, and (4) mRNA for hemoglobin, where in the newly synthesized hemoglobin would the Ala from Ala-tRNACys be incorporated?

#SCPH05 I Biotechnology

  1. Nowhere; this is the equivalent of a nonsense mutation

  2. Wherever Ala normally occurs

  3. Wherever Cys normally occurs

  4. Wherever either Ala or Cys normally occurs

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TLS Online TPP Program

#Question id: 6994

#SCPH01 Biochemistry

Puberty is initiated by pulse release of _____________(hormone)
TLS Online TPP Program

#Question id: 696

#SCPH05 I Biotechnology

An alpha helix would be destabilized most by:
TLS Online TPP Program

#Question id: 3875

#SCPH01 Biochemistry

Splicing of introns in nuclear mRNA primary transcripts requires:
TLS Online TPP Program

#Question id: 2642

#SCPH05 I Biotechnology

We know that lactose has a positive impact on the activity of the lac operon. Tryptophan’s presence has a ________________
TLS Online TPP Program

#Question id: 5084

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

The first cavity formed during frog development is the ________.