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TLS Online TPP Program

#Question id: 801

Identify the type of DNA from the structures given below and match the correct form with its characteristics described.

#Part-B Specialized Branches in Biotechnology

  1. (ii) – The more compact A form of DNA has 11 bp per turn and shows a large tilt of the base pairs with respect to the helix axis.

  2. (i) – The B form, which is observed at high humidity, most closely corresponds to the average structure of DNA under physiological conditions.

  3. (iii) – Z DNA is a left-handed helix and has a zigzag (hence “Z”) appearance and has an anti-conformation of glycosyl bond.

  4. (i) – The A form which is observed under low humidity has a structure similar to the structure that RNA adopts when double-helical.

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TLS Online TPP Program

#Question id: 11219

#Part-B Specialized Branches in Biotechnology

The amino acid that operates at most inhibitory synapses in the brain is ________.
TLS Online TPP Program

#Question id: 11220

#Part-B Specialized Branches in Biotechnology

The botulinum toxin, which causes botulism, reduces the synaptic release of ________.
TLS Online TPP Program

#Question id: 11222

#Part-B Specialized Branches in Biotechnology

A chemical that affects neuronal function but is not stored in presynaptic vesicles is ________.
TLS Online TPP Program

#Question id: 11223

#Part-B Specialized Branches in Biotechnology

Of those listed, which event occurs first following a depolarizing stimulus applied to the presynaptic membrane of an axon terminal?
TLS Online TPP Program

#Question id: 11224

#Part-B Specialized Branches in Biotechnology

How could you increase the magnitude of excitatory postsynaptic potentials (EPSPs) generated at a synapse?
TLS Online TPP Program

#Question id: 11225

#Part-B Specialized Branches in Biotechnology

What happens if twice as many inhibitory postsynaptic potentials (IPSPs) as excitatory postsynaptic potentials (EPSPs) arrive in close proximity at a postsynaptic neuron?