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TLS Online TPP Program

#Question id: 11201

Why are action potentials usually conducted in one direction?

#I Life Science/ Life Sciences Group – I-V
  1. The nodes of Ranvier conduct potentials in one direction.
  2. The brief refractory period prevents reopening of voltage-gated sodium channels.
  3. The axon hillock has a higher membrane potential than the terminals of the axon.
  4. Voltage-gated channels for both Na+ and K+ open in only one direction.
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TLS Online TPP Program

#Question id: 4180

#SCPH28 | Zoology

The anticodon of tRNAala can bind to three different codons for alanine (GCU, GCC and GCA) because
TLS Online TPP Program

#Question id: 3260

#SCPH28 | Zoology

Consider a diploid population at Hardy-Weinberg equilibrium. For a locus with two alleles, the frequency of the A1A1 genotype is 0.04) The frequency of A2 allele is
TLS Online TPP Program

#Question id: 1567

#SCPH06 I Botany

Which of the following cell types are responsible for initiating a secondary immune response?
TLS Online TPP Program

#Question id: 4160

#SCPH05 I Biotechnology

Different tRNA molecules that bind the same amino acid are called __ tRNA molecules.
TLS Online TPP Program

#Question id: 412

#I Life Science/ Life Sciences Group – I-V

All of the following contribute to the large, negative, free-energy change upon hydrolysis of “high-energy” compounds except: