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TLS Online TPP Program

#Question id: 694

Thr and/or Leu residues tend to disrupt an alpha helix when they occur next to each other in a protein because:

#Unit 1. Molecules and their Interaction Relevant to Biology

  1. an amino acids like Thr is highly hydrophobic.

  2. covalent interactions may occur between the Thr side chains.

  3. electrostatic repulsion occurs between the Thr side chains.

  4. steric hindrance occurs between the bulky Thr side chains.

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TLS Online TPP Program

#Question id: 7056

#Unit 5. Developmental Biology

In mammalian development, Only trophoblast cells synthesize the transcription factor Cdx2, which:
TLS Online TPP Program

#Question id: 2003

#Unit 4. Cell Communication and Cell Signaling

The number of MHC protein combinations possible in a given population is enormous. However, an individual in that population has only a couple of MHC possibilities. Why?
TLS Online TPP Program

#Question id: 26363

#Unit 2. Cellular Organization

Which of the type of reactions performed in Inserting DNA into a phage head
TLS Online TPP Program

#Question id: 4001

#Unit 1. Molecules and their Interaction Relevant to Biology

Which is not true about the lac repressor?
TLS Online TPP Program

#Question id: 21276

#Unit 12. Applied Biology

Which one of the following is a protein with a high molar mass?