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TLS Online TPP Program

#Question id: 11203

Which of the following statements about action potentials is correct?

#Unit 7. System Physiology – Animal
  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.
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TLS Online TPP Program

#Question id: 10984

#Unit 7. System Physiology – Animal

Which of the following are caused by acetylcholine?
TLS Online TPP Program

#Question id: 4891

#Unit 8. Inheritance Biology

plantlike organism on the planet Pandora can have three recessive genetic traits: bluish leaves, due to an allele (a) of gene A; a feathered stem, due to an allele (b) of gene B; and hollow roots due to an allele (c) of gene C. The three genes are linked and recombine. A geneticist performed a testcross with an organism that had been found to be heterozygous for the three recessive traits, and she was able to identify progeny of the following phenotypic distribution (+ = wild type):

 A) Genes are in the order: a-c-b

B) Genes are in the order: a-b-c.

C) Genes are in the order: b-a-c

D) Interference is one

E) Greatest distance between gene a and b
TLS Online TPP Program

#Question id: 26449

#Unit 3. Fundamental Processes

Ability of core and holoenzyme to transcribe DNAs differs, so choose which of the following is correct
a.With  subunit, the holoenzyme worked equally well on both intact as well as nicked types of DNA
b.With  subunit, the holoenzyme worked unequally on both intact as well as nicked types of DNA
c.Core subunit α2ββσ can not perform polymerization on to the intact DNA while perform some of the activity on to the nicked DNA
d.Core subunit α2ββσ can not perform polymerization on to the intact DNA AS WELL AS  to the nicked DNA
TLS Online TPP Program

#Question id: 727

#Unit 1. Molecules and their Interaction Relevant to Biology

26-residue peptide composed of alanine and leucine shows a circular dichroism (CD) spectrum characteristic of α-helix at 50°C in 5 mM phosphate buffer at pH 7.4. When the peptide solution is cooled gradually to 25°C, and the CD spectra are recorded at different temperatures, the most likely observation will be that
TLS Online TPP Program

#Question id: 2995

#Unit 2. Cellular Organization

 Which of the following incorrect pair?