Answer:
ubiquitin targets CDKs
Explanation:
Cyclins are named such because they undergo a constant cycle of synthesis and degradation during cell division. When cyclins are synthesized, they act as an activating protein and bind to Cdks forming a cyclin-Cdk complex. This complex then acts as a signal to the cell to pass to the next cell cycle phase.
Cyclins drive the events of the cell cycle by partnering with a family of enzymes called the cyclin-dependent kinases (Cdks). A lone Cdk is inactive, but the binding of a cyclin activates it, making it a functional enzyme and allowing it to modify target proteins.
<span>The formation of the fertilization envelope (slow-block to polyspermy) requires an increase in the availability of </span>calcium ions.
Slow-block to polyspermy is also called cortical reaction. In this reaction, the sperm will be permanently blocked by cortical granules. The release of calcium ion will trigger this reaction.
Snake goes to frog frog goes to bug bug goes to leaf and leaf goes to soil
The process by which different kinds of living organisms are thought to have developed and diversified from earlier forms during the history of the earth.
Answer:
The term matter refers to something that consumes space and has mass, the "stuff" of which the universe is made, in other words. All matter consists of substances called atoms, which have different chemical and physical properties and can not be broken down by ordinary chemical reactions into other substances.
Explanation:
