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TLS Online TPP Program

#Question id: 7124

Neural crest cells that follow a dorso-lateral route of migration under the skin will become melanocytes; how is their differentiation into melanocytes triggered during their migration?

#Unit 5. Developmental Biology
  1. The neural crest cells are already determined to become melanocytes before they leave the neural tube
  2. N-cadherin and E-cadherin are lost from the neural crest cells when they initiate their migration, and this signals the cells to become melanocytes.
  3. BMP and noggin control the fate of neural crest cells.
  4. The cells in the skin express a ligand (stem cell factor, SCF, also known as Steel) on their surface, which interacts with a receptor (Kit, also known as white spotting) on the surface of the neural crest derived cells; this interaction triggers their differentiation as melanocytes.
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TLS Online TPP Program

#Question id: 27968

#Unit 1. Molecules and their Interaction Relevant to Biology

As intermediates of the citric acid cycle are removed to serve as biosynthetic precursors, they are replenished by
TLS Online TPP Program

#Question id: 27969

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following is correct overall reaction for ETS
TLS Online TPP Program

#Question id: 27970

#Unit 1. Molecules and their Interaction Relevant to Biology

For the redox pair NAD/NADH, E is -0.320 V, and for the pair O2/H2O, E is 0.816 V.  The DE for this reaction is therefore 1.14 V, and the standard free-energy change ā–³Gā€™0 is
TLS Online TPP Program

#Question id: 27971

#Unit 1. Molecules and their Interaction Relevant to Biology

What is the electron transfer series between complex I to Q
TLS Online TPP Program

#Question id: 27972

#Unit 1. Molecules and their Interaction Relevant to Biology

This is the order of electron transfer in complex-I NADH - FMN - Fe-S ā€“ Q to Prevent electron transfer from Fe-S center to ubiquinone 

a. Myxothiazol

b. Rotenone

c. Amytal

d. Piericidin A

Which of the following can be used
TLS Online TPP Program

#Question id: 27973

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following is responsible to Blocks electron transfer with in complex III from cytochrome b to cytochrome c