TLS Online TPP Program

#Question id: 7310


Which statement best describes the mechanism for circadian rhythm?

#I Life Science/ Life Sciences Group – I-V
  1. There is an alternation between enhanced and inhibited expression of clock genes.
  2. Clock genes inhibit gene expression of positive elements.
  3. Clock genes inhibit expression of negative elements.
  4. The time-keeping mechanism depends only on the breakdown of negative elements.