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TLS Online TPP Program

#Question id: 16966

CCR5 that plays a role in inflammatory response. Unfortunately, this protein is also a key to human immunodeficiency virus (HIV) infection. The virus binds to a loop of the CCR5 protein and then enters the cell. Some people have an allele called Δ32 at the CCR5 locus in which 32 bp are deleted. The missing part of the gene codes for the loop in the protein to which the virus attaches. Which statements is true for CCR5?

#Unit 11. Evolution and Behavior
  1. both homozygous and heterozygous partly resistant to HIV
  2. People who are homozygous for the deletion are partly resistant to HIV, while highly heterozygotes are resistant.
  3. People who are homozygous for the deletion are highly resistant to HIV, while heterozygotes are partly resistant.
  4. both homozygous and heterozygous highly resistant to HIV
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TLS Online TPP Program

#Question id: 27077

#Unit 1. Molecules and their Interaction Relevant to Biology

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: 27075

#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. This phenomenon can be explained by 
TLS Online TPP Program

#Question id: 27074

#Unit 1. Molecules and their Interaction Relevant to Biology

Choose the incorrect statement of the following about the Spontaneous dipole-dipole interaction 
TLS Online TPP Program

#Question id: 27073

#Unit 1. Molecules and their Interaction Relevant to Biology

The potential energy of the interaction for the given pair of the image below is represented by the equation
TLS Online TPP Program

#Question id: 27072

#Unit 1. Molecules and their Interaction Relevant to Biology

Choose the incorrect statement regarding the Van der Waals interactions & Hydrogen bonds
1. In Van der Waals interactions greater the area of contact the stronger the interaction.
2. In Van der Waals interactions greater the area of contact the weaker  the interaction.
3. Hydrogen bonds Relative strength is inversely proportional to the polarity More polar atoms form weak H bonds.
4. Hydrogen bonds Relative strength is directly proportional to the polarity More polar atoms form stronger H bonds.
TLS Online TPP Program

#Question id: 27071

#Unit 1. Molecules and their Interaction Relevant to Biology

Bond forces and their strength are given match them correctly 

 Force Strength (kJ/mol) 
 1. Van der Waals interactions a. <40
 2. Hydrogen bonds b. 20
 3. Ionic interactions c. 12–30
 4. Hydrophobic interactions d. 0.4–4.0