Energy
they could be producers or consumers
producers make their own food/energy
consumers get energy from other living things
The answer would most likely be B
Hope this helps :)
Answer:
Cell membrane
If this helped can i have Brainliest
Answer:
They regulate the cell cycle by phosphorylating other proteins
Explanation:
they are serine-threonine kinases, they play an important role in the phosphorylation of other proteins. Cyclin-CDK complexes phosphorylate substrates appropriate for a particular cell cycle phase and without that, the cycle cannot continue.