TLS Online TPP Program

#Question id: 7192


The following are statements regarding the development and maintenance of anterior and posterior compartments in each segment of Drosophila. Which of the following is correct?

#Unit 5. Developmental Biology
  1. Expression of wingless and engrailed is activated by pair-rule genes.
  2. Continued expression of wingless and engrailed is maintained by interaction between the cells expressing frizzled and Wingless proteins.
  3. Hedgehog is expressed in wingless expressing cells and forms short range gradient.
  4. Engrailed is a secretory factor and binds with the patched receptor of the wingless expressing cells.

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TLS Online TPP Program

#Question id: 27078

#Unit 1. Molecules and their Interaction Relevant to Biology

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. Molecules and their Interaction Relevant to Biology

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. Molecules and their Interaction Relevant to Biology

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: 27569

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following is the most prominent type of interaction found between two molecule of water

TLS Online TPP Program

#Question id: 27570

#Unit 1. Molecules and their Interaction Relevant to Biology

Some of the following's statement is made regarding the Van der Waals interaction

a. Van der Waals interaction is the weakest of all intermolecular attractions between molecules.

b. The van der Waals interaction primarily depends on interatomic distance.

c. Fundamental Behind VWI is DIPOLE 

d. Fundamental Behind VWI is orbital overlapping

Choose which of the above is incorrect

TLS Online TPP Program

#Question id: 27571

#Unit 1. Molecules and their Interaction Relevant to Biology

As atom "A" approaches, the electrons of atom "B" will be attracted by the positive end of atom "A". As a result, the electrons of atom "B" will migrate to the left side and make the left side slightly negative, such given condition leads to the formation of