Practice Questions

TLS Online TPP Program

#Question id: 11206

Tetrodotoxin blocks voltage-gated sodium channels, and ouabain blocks sodium-potassium pumps. If you added both tetrodotoxin and ouabain to a solution containing neural tissue, what responses would you expect?

#Unit 7. System Physiology – Animal

immediate loss of resting potential
immediate loss of action potential with gradual shift of resting potential
slow decrease of resting potential and action potential amplitudes
No effect; the substances counteract each other.

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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

TLS Online TPP Program

#Question id: 27572

#Unit 1. Molecules and their Interaction Relevant to Biology

Nitrogenous Base pairs & aromatic amino acids stack together through pi, pi-electronic interactions, These stacking interactions are best example of

TLS Online TPP Program

#Question id: 27573

#Unit 1. Molecules and their Interaction Relevant to Biology

Interaction type, Distance dependence of potential energy, and Typical energy (kJ mol-1) are given

Interaction type	Distance dependence of potential energy	Typical energy (kJ mol⁻¹)
1. Ion-ion	a. 1/r⁶	i. 2
2. Ion-dipole	b. 1/r⁶	ii. 15
3. Dipole-dipole (rotating polar molecule)	c. 1/r²	iii. 0.3
4. London (dispersion)	d. 1/r	iv. 250

Match them correctly

TLS Online TPP Program

#Question id: 27574

#Unit 1. Molecules and their Interaction Relevant to Biology

Misplaced Dispersion forces are responsible for

a. Sickle-Cell Anemia

b. Alzheimer's disease

c. CFTR

d. Huntington disease

Choose which of the above set of diseased caused by Misplaced Dispersion

TLS Online TPP Program

#Question id: 27575

#Unit 1. Molecules and their Interaction Relevant to Biology

Which kind of interactions occur between the side chains of oppositely charged residues as well as between the NH3+ and COO− groups at the ends of polypeptide