TLS Online TPP Program

#Question id: 4664


Which one of the following statements about E.coli RNA poymerase is false?

#Unit 3. Fundamental Processes
  1. The holoenzyme includes the sigma factor

  2. The core enzymes includes the sigma factor

  3. It requires Mg2+ for its activity

  4. It requires Zn2+ for it activity

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TLS Online TPP Program

#Question id: 11120

#Unit 7. System Physiology – Animal

The release of neurotransmitter at a chemical synapse in the central nervous system is dependent upon which of the following?

TLS Online TPP Program

#Question id: 11121

#Unit 7. System Physiology – Animal

Which of the following statements concerning the mechanoreceptive receptor potential is/are true?

TLS Online TPP Program

#Question id: 11122

#Unit 9. Diversity of Life Forms

Phylogenetic hypotheses (such as those represented by phylogenetic trees) are strongest when

TLS Online TPP Program

#Question id: 11123

#Unit 9. Diversity of Life Forms

Cladograms (a type of phylogenetic tree) constructed from evidence from molecular systematics are based on similarities in

TLS Online TPP Program

#Question id: 11124

#Unit 9. Diversity of Life Forms

A researcher compared the nucleotide sequences of a homologous gene from five different species of mammals with the homologous human gene. The sequence homology between each speciesʹ version of the gene and the human gene is presented as a percentage of similarity.

What probably explains the inclusion of rabbits in this research?

TLS Online TPP Program

#Question id: 11125

#Unit 7. System Physiology – Animal

In chemical synapses that involve a so-called second messenger, typically a G-protein linked to the postsynaptic receptor is activated when neurotransmitter binds to that receptor. Which of the following represents an activity performed by the activated second messenger?