Practice Questions

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?

#SCPH01 Biochemistry

Cell-signaling pathways are seen in "primitive" cells such as bacteria and yeast.
Bacteria and yeast cells signal each other in a process called quorum sensing.
Signal transduction molecules identified in distantly related organisms are similar.
Most signals in all types of cells are received by cell surface receptors.

More Questions

TLS Online TPP Program

#Question id: 5548

#SCPH06 I Botany

Vertebrate lungs are derived from

TLS Online TPP Program

#Question id: 8917

#SCPH28 | Zoology

The Hox genes came to regulate each of the following in what sequence, from earliest to most recent?

1. identity and position of paired appendages in protostome embryos

2. formation of water channels in sponges

3. anterior-posterior orientation of segments in protostome embryos

4. positioning of tentacles in cnidarians

5. anterior-posterior orientation in vertebrate embryos

TLS Online TPP Program

#Question id: 435

#SCPH06 I Botany

What defines a near-equilibrium reaction?

TLS Online TPP Program

#Question id: 3894

#SCPH28 | Zoology

Which of the following is a DNA sequence?

TLS Online TPP Program

#Question id: 1680

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

Where are the MHC class II region genes in the mouse located?