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: 10884

#Unit 10. Ecological Principles

Herbivore ingests plant material with 1000 k j energy form producer and 300 kJ loss as feces waste; additionally herbivore invests 300 k j energy in respiration. What is production efficiency of that herbivore?

TLS Online TPP Program

#Question id: 11005

#Unit 7. System Physiology – Animal

Which of the following phases of the cardiac cycle follows immediately after the beginning of the QRS wave?

TLS Online TPP Program

#Question id: 14474

#Unit 13. Methods in Biology

Probability of getting an even number in a single throw with a die is

TLS Online TPP Program

#Question id: 27387

#Unit 1. Molecules and their Interaction Relevant to Biology

Electron affinity depends on

TLS Online TPP Program

#Question id: 1250

#Unit 4. Cell Communication and Cell Signaling

Few mutants (column A) and their results (column B) are listed in the table given below:

Column A	Column B
A. Gain-of-function of Ski	I. Inhibits the ability of activated type I TGF-β receptors (RI) to phosphorylate R-Smad proteins
B. Loss-of-function of RII receptor	II. Transcription activation induced by TGF-β and mediated by Smad complexes is shut down
C. Gain-of-function of smad-7
D. Loss-of-function of R-smad

Match the correct mutation with the observe result?