Answer: B) cyclin and cyclin - dependant kinase (CDK)
Explanation: MPF also known as mitosis promoting factor is the cyclin-CDK complex, It stimulates the mitotic and meiotic phases of the cell cycle. MPF promotes the entrance into mitosis (the M phase) from the G2 phase by phosphorylating multiple proteins needed during mitosis. MPF is activated at the end of G2 by a phosphatase, which removes an inhibitory phosphate group added earlier during the cycle.
MPF is composed of two subunits:
Cyclin-dependent kinase 1 (CDK1), the cyclin-dependent kinase subunit uses ATP to phosphorylate specific serine and threonine residues of target proteins.
Cyclin is a regulatory subunit. The cyclins helps to regulate the function of the kinase subunit with the appropriate substrate. The mitotic cyclins can be grouped as cyclins A & B. These cyclins have 9 residue sequence in the N-terminal region called the “destruction box”, which can be recognized by the ubiquitin ligase enzyme which destroys the cyclins when appropriate.
The process of mitosis, or cell division, is also known as the M phase. This is where the cell divides its previously-copied DNA and cytoplasm to make two new, identical daughter cells. Mitosis consists of four basic phases: prophase, metaphase, anaphase, and telophase.
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Answer:
Both 1 and 2 are Latin.
Explanation:
The translator detected Latin.
In English, they translate to:
1. Now answer this question below.
2. How are you doing today?
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Answer:
D. A joint in the spine that is slightly movable and separated by cartilage.
Explanation:
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1. Balances fluids.
2. Structure. Support for tissues.