In multiple sclerosis, the myelin sheaths around the axons of the brain and spinal cord are damaged and demyelination results. How does this disease manifest at the level of the action potential?

 I) Action potentials move in the opposite direction on the axon.

 II) Action potentials move more slowly along the axon.

 III) No action potentials are transmitted.

TLS Online TPP Program

#Question id: 12366

#Unit 1. Molecules and their Interaction Relevant to Biology

During nucleotide formation addition of purines and pyrimidines on sugar residue occurs at Nitrogen position no.

TLS Online TPP Program

#Question id: 12367

#Unit 1. Molecules and their Interaction Relevant to Biology

RNA contains ribose sugar. What could happen due the presence of extra hydroxyl group?

TLS Online TPP Program

#Question id: 12368

#Unit 1. Molecules and their Interaction Relevant to Biology

In Thymine base structure methyl group is present at position

TLS Online TPP Program

#Question id: 12369

#Unit 1. Molecules and their Interaction Relevant to Biology

Phosphoric acid attachment occur to ribose or deoxyribose at

A. C3 during phosphodiester bond formation

B. C5 during nucleotide formation

C. C2 during phosphodiester bond formation

D. C1 during nucleotide formation

Which of the combinations contains all incorrect statements?

TLS Online TPP Program

#Question id: 12370

#Unit 1. Molecules and their Interaction Relevant to Biology

Dideoxy ribose sugar contains

TLS Online TPP Program

#Question id: 12989

#Unit 1. Molecules and their Interaction Relevant to Biology

Choose the correct statement related to hydrogen bond and Van der Waals interactions

a. Hydrogen bond formation takes place between dipole-dipole interaction.

b. Van der waals interaction takes place between induced dipole-induced dipole.

c. Hydrogen bond formation takes place between induced dipole-induced dipole.

d. Van der waals interaction takes place between dipole-dipole interaction.