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TLS Online TPP Program

#Question id: 1121

Which of the following provides the best evidence that cell-signaling pathways evolved early in the history of life?

#XL - Q Biochemistry

  1. Cell-signaling pathways are seen in "primitive" cells such as bacteria and yeast.

  2. Bacteria and yeast cells signal each other in a process called quorum sensing.

  3. Signal transduction molecules identified in distantly related organisms are similar.

  4. Most signals in all types of cells are received by cell surface receptors.

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TLS Online TPP Program

#Question id: 16493

#XL - R Botany

35S promoter sequences derived from cauliflower mosaic virus shows which type of expression.
TLS Online TPP Program

#Question id: 19642

#XL - P Chemistry

Molecular mass of volatile substance is determined by
TLS Online TPP Program

#Question id: 4979

#XL - S Microbiology

The dicynodonts that survived the Permian extinction would initially have had to endure (or escape from) the physical effects of __________, and subsequently, the biological effects of __________.
TLS Online TPP Program

#Question id: 1771

#XL - Q Biochemistry

Anti-Rh antibody?
TLS Online TPP Program

#Question id: 364

#XL - S Microbiology

 A solution contains 0.0000001 (10-7) moles of hydrogen ions [H+] per liter. Which of the following best describes this solution?