Which of the following statements is true of cyclin-dependent kinases? O O O O O They regulate the cell cycle by phosphorylating
other proteins They serve as receptors in signal-transduction pathways. They bring about apoptosis within cancer cells. They add methyl groups to histone proteins to assist in gene regulation. They speed up the cell cycle and cause abnormal cell proliferation. Which of the following statements is true of cyclins? O O O O O The levels of cyclin oscillate during the course of the cell cycle. They add methyl groups to histone proteins to assist in gene regulation. They regulate the cell cycle by phosphorylating other proteins. They normally speed up the cell cycle and cause abnormal cell proliferation. They function via an intracellular domain to which a signaling molecule can bind.
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.
The altered protein affected the function of the cell membrane. The cell membrane which contain a bilayer control the movement of substance in and out of the cell and organelles. Due to this it is selective permeable to ion and organic molecules.
