TLS Online TPP Program

#Question id: 11822


The rate-limiting step in the Ethylene biosynthetic pathway is____

#Unit 6. System Physiology – Plant
  1. the conversion of ACC to Ethylene
  2. the conversion of methionine to AdoMet
  3. the conversion of AdoMet to ACC
  4. ACC to N-Malonyl ACC
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TLS Online TPP Program

#Question id: 27077

#Unit 1. Structure and Function of Biomolecules

The van der Waals interaction as a function of interatomic distance r (on x axis) which of the following graph is correctly representing the relation between attractive and repulsive region vs interatomic distance r


TLS Online TPP Program

#Question id: 27078

#Unit 1. Structure and Function of Biomolecules

The combined repulsive and attractive van der Waals terms are described by plots of the potential energy as a function of interatomic separation distance



Which of the following's assumptions can be drawn from given graph related phenomenon
1. As the interatomic distance increases attractive forces act dominantly by the factor of 1/r12 
2. As the interatomic distance increases attractive forces act dominantly by the factor of 1/r6 
3. As the interatomic distance decreases repulsive forces act dominantly by the factor of 1/r6 
4. As the interatomic distance decreases repulsive forces act dominantly by the factor of 1/r12 

TLS Online TPP Program

#Question id: 27079

#Unit 1. Structure and Function of Biomolecules

The van der Waals interaction as a function of interatomic distance r, then which of the following equation is correct 

TLS Online TPP Program

#Question id: 27080

#Unit 1. Structure and Function of Biomolecules

Choose the correct statement about Vander-wall interaction  
1. Van der Waals potential (Evdw) is the sum of all interactions over all atoms
2. Van der Waals potential (Evdw)  is calculated by
3. This type of interaction is often called a 6–12 interaction, or the Leonard Jones potential.
4. Van der Waals forces are extremely weak, especially when compared with other forces influencing protein conformation

TLS Online TPP Program

#Question id: 27081

#Unit 1. Structure and Function of Biomolecules

Which of the following is correctly describing the A dihedral angle or torsion angle 

TLS Online TPP Program

#Question id: 27082

#Unit 1. Structure and Function of Biomolecules

Choose the incorrect statement regarding β -turns