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TLS Online TPP Program

#Question id: 4148

Which of the following is true about the sorting pathway for proteins destined for incorporation into lysosomes or the plasma membrane of eukaryotic cells?

#SCPH28 | Zoology

  1. Binding of SRP to the signal peptide and the ribosome temporarily accelerates protein synthesis.

  2. The newly synthesized polypeptides include a signal peptide at their carboxyl termini.

  3. The signal peptide is cleaved off inside the mitochondria by signal peptidase.

  4. The signal recognition particle (SRP) binds to the signal peptide soon after it appears outside the ribosome.

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TLS Online TPP Program

#Question id: 4154

#SCPH06 I Botany

How many possible codons (of normal size) are possible using the bases found in DNA?
TLS Online TPP Program

#Question id: 16104

#SCPH28 | Zoology

The most potent mechanism for increasing heat production is
TLS Online TPP Program

#Question id: 13037

#SCPH05 I Biotechnology

Which of the following proteins will be most far away from the positively charged electrode during isoelectric focusing in a buffer with pH of 5?
TLS Online TPP Program

#Question id: 11418

#SCPH28 | Zoology

Use the following diagram of five islands formed at around the same time near a particular mainland, as well as MacArthur and Wilson's island equilibrium model principles


Which island would likely have the lowest extinction rate?
TLS Online TPP Program

#Question id: 5755

#SCPH06 I Botany

A researcher studying bacterial toxin predicts that a lysine within the toxin is important for binding it’s target cell.  She used site-directed mutagenesis to change a codon for lysine (AAA) to one for asparagine (AAU).  However, the mutant toxin still binds to its target cell just as well as the wild-type toxin bound and appears to have no other changes. This type of mutation is probably