Active guanylyl cyclase causes the sperm cell to produce more cGMP, that activates a calcium channel in the cell membrane of the sperm tail.

TLS Online TPP Program

#Id: 9025

#Unit 6. System Physiology – Plant

TLS Online TPP Program

#Id: 4734

#Unit 5. Developmental Biology

TLS Online TPP Program

#Id: 9792

#Unit 6. System Physiology – Plant

Effect of light is Photomorphogenesis

 A decrease in the rate of stem elongation

The beginning of apical-hook straightening

The initiation of the synthesis of pigments

TLS Online TPP Program

#Id: 7449

#Unit 5. Developmental Biology

For induction of prespore differentiation and control of spore germination cAMP is produced by adenylate cyclase G (ACG)

TLS Online TPP Program

#Id: 5894

#Unit 3. Fundamental Processes

When a nucleotide binds, the fingers domain rotates 60° toward the palm, with the tops of the fingers moving by 30 Å. The thumb domain also rotates toward the palm by 8°. 

These changes are cyclical:

They are reversed when the nucleotide is incorporated into the DNA chain, which then translocates through the enzyme to recreate an empty site.