Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 26317
TLS Online TPP Program

#Question id: 9596

The reaction centre chlorophyll is transiently in an oxidized state after losing an electron and before being re-reduced by its electron donor, what characteristics has been shown by chlorophylls in an oxidized state?

#Unit 6. System Physiology – Plant
  1. chlorophylls lose their characteristic low light absorbance in the red region of the spectrum; they become bleached
  2. chlorophylls lose their characteristic strong light absorbance in the red region of the spectrum; they become bleached
  3. chlorophylls lose their characteristic strong light absorbance in the far-red region of the spectrum; they become bleached
  4. chlorophylls lose their characteristic strong light absorbance in the far-red region of the spectrum; they become bleached
More Questions
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: 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.