The enzyme that helps to regulate the cell cycle is called?
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By injecting a protein found from a cell in mitosis into a non-dividing cell, a mitotic spindle forms. The protein was later called cyclin. Cyclins regulate the timing of the …cell cycle. (MORE)
Cyclins-a group of protein-regulate the timing of the cell cycle in eukaryotic cells. There are two types of these regulatory proteins: internal regulators and external regula…tors. (MORE)
Yes, cyclins along with cyclin-dependent kinases (Cdks) regulate the cell cycle, especially at G2 checkpoint. The activity of the kinases depends on the fluctuating concentrat…ion of the cyclins. At the G2 checkpoint, the Cdk complex called the maturation-promoting factor (MPF) triggers the cell's passage from the G2 checkpoint into the M phase. When the cyclin concentration increases during G2, the cyclin-dependent kinases combine with the cyclins, forming MPF molecules. These MPF molecules then initiate mitosis by phosphorylating a variety of proteins including proteins of the nuclear lamina, promoting fragmentation of the nuclear lamina and the nuclear envelope; MPF is the most active during metaphase. MPF may also contribute to chromosome condensation and spindle formation. But like many regulatory systems, the MPF also has an "off switch." During anaphase, the MPF initiates the degradation of its own cyclin, terminating the M phase. The cell then enters the G1 phase. Many regulatory processes are reversible and cyclins, and Cdks are no exception as the Cdk part of the MPF is recycled and remains in the cell in its inactive form until new cyclin molecules are synthesized during the next round of the cycle in the S and G2 phases. (MORE)
The female cycle or the menstrual cycle can last from 21 to 35 days and still be considered normal. It starts the first day of a woman's period and continues on through each p…hase of the menstrual cycle. The cycle ends on the first day of her next period. The (MORE)
A female dog goes into heat when she is ready to breed. There are four stages in a dog heat cycle. Knowing the stages of a dog heat cycle is essential for breeding dogs. It is… also important if you wish to prevent your female dog from getting pregnant. The (MORE)
Symptoms of the menstrual cycle can be scary, and even painful to girls, or women that have never gone through it before. The symptoms are different for everyone. Some people …will feel so badly, they may stay home from school or work. Others don't even notice any symptoms at all, (MORE)
They use inhibitors which can either be competitive or non-competitive. This essentially turns the enzyme on and off.
1). Chromosomal mutation: caused by extensive chemical change in the structure of chromosome.2). Gene mutation - Change in the nitrogenous base sequence of gene ( also called …point mutation): caused by a single change in molecular structure in a gene. Usually involves substitution/addition of one nucleotide for another, and the deletion of nucleotide.3) Mutagens such as chemical agents and exposure to radiation. (MORE)
internal regulators respond to events occurring inside of a cell and external regulators respond to the outside events