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TLS Online TPP Program

#Question id: 2179

Ion channels achieve selectivity in transport through all of the following mechanisms EXCEPT:

#XL - S Microbiology

  1. evolution from distinct and different parent proteins.

  2. divergent evolution from a single type of channel protein.

  3. low activation energy for selective passage of the dehydrated ion.

  4. use of P segments to form an ion selectivity filter.

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TLS Online TPP Program

#Question id: 2922

#XL - T Zoology

Human genes/proteins that regulate the cell cycle are most easily isolated by:
TLS Online TPP Program

#Question id: 8928

#XL - R Botany

An adult animal that possesses bilateral symmetry is most certainly also
TLS Online TPP Program

#Question id: 20201

#XL - P Chemistry

Which of the following statements in relation to the hydrogen atom is correct?
TLS Online TPP Program

#Question id: 2200

#XL - Q Biochemistry

A neurotransmitter that binds to a postsynaptic cell and opens K+ channels:
TLS Online TPP Program

#Question id: 16488

#XL - R Botany

Advantages of organ culture are