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.
Organism a is the parent and b and c are siblings
The cerebrum is the largest brain<span> structure in humans and </span>accounts<span> for about two-thirds of the </span><span>brain’s mass</span>
Silk worms are an invasive species in the UK. They cover trees and kill them….. silk comes out of their butt and we call it silk thread. Silk thread is silk spun into thread, or silk worm pooo pooooooo
Answer:
for a celestial body to be a planet of the solar system, it must meet three conditions: it must be in orbit around the Sun, have been molded by its own gravity into a round or nearly round shape, and have “cleared the neighbourhood around its orbit,
Explanation: