TLS Online TPP Program

#Question id: 11203


Which of the following statements about action potentials is correct?

#I Life Science/ Life Sciences Group – I-V
  1. Action potentials for a given neuron vary in magnitude.
  2. Action potentials for a given neuron vary in duration.
  3. Action potentials are propagated down the length of the axon.
  4. Movement of ions during the action potential occurs mostly through the sodium pump.
More Questions
TLS Online TPP Program

#Question id: 4762

#SCPH12 I Genetics

a semilethal allele is an example of which of the following extensions of mendelian genetics?

TLS Online TPP Program

#Question id: 4763

#SCPH01 Biochemistry

in a rare blood type referred to as the bombay phenotype, individuals are unable to attach the a or b antigens to their red blood cells. individuals that are homozygous recessive for gene "h" have the bombay phenotype and their blood type is type "o" regardless of their abo genotype. this is an example of what extension of mendelian inheritance?

TLS Online TPP Program

#Question id: 4763

#SCPH12 I Genetics

in a rare blood type referred to as the bombay phenotype, individuals are unable to attach the a or b antigens to their red blood cells. individuals that are homozygous recessive for gene "h" have the bombay phenotype and their blood type is type "o" regardless of their abo genotype. this is an example of what extension of mendelian inheritance?

TLS Online TPP Program

#Question id: 4764

#SCPH01 Biochemistry

Which of the following is the best example of overdominance?

TLS Online TPP Program

#Question id: 4764

#SCPH12 I Genetics

Which of the following is the best example of overdominance?

TLS Online TPP Program

#Question id: 4765

#SCPH01 Biochemistry

The recessive mutant allele that causes cystic fibrosis is much more frequent in Caucasians population than in other world populations. Some scientists believe heterozygotes must have had a survival advantage during plagues such as cholera that occasionally swept through this population. What concept does this illustrate?