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TLS Online TPP Program

#Question id: 11205

What would probably happen if a long neuron had one continuous myelin sheath down the length of the axon with no nodes of Ranvier?

#I Life Science/ Life Sciences Group – I-V
  1. The action potential would be propagated nearly instantaneously to the synapse.
  2. There could be no action potential generated at the axon hillock.

  3. The signal would fade because it is not renewed by the opening of more sodium channels.

  4. Only potassium could move across the membrane, but not sodium.
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TLS Online TPP Program

#Question id: 672

#SCPH28 | Zoology

An ideal α-helix has a pitch of 0.54 nm and a rise of 0.15 nm. What is the length along the helix axis for a segment of an ideal α-helix that contains 30 amino acids?
TLS Online TPP Program

#Question id: 7767

#SCPH28 | Zoology

How can evolution select for phenotypes that postpone reproduction or sexual maturity?” There is often a trade-off between reproduction and maintenance, and in many species reproduction and senescence are closely linked. Recent studies of mice, Caenorhabditis elegans, and Drosophila suggest that there is a conserved genetic pathway that regulates aging and that it can indeed be selected for. This pathway involves the response to insulin and insulin-like growth factors, Name of these transcription factors are
TLS Online TPP Program

#Question id: 13030

#SCPH28 | Zoology

The mutation in Vir F will cause the interference in –
TLS Online TPP Program

#Question id: 19369

#SCPH28 | Zoology

Genes are transferred from prokaryotes into plants this phase is considered as 
TLS Online TPP Program

#Question id: 2140

#SCPH06 I Botany

According to the current model for HIV infection, which of the following is not involved in the process of membrane fusion?