Answer: 1. Cyclin-dependent kinases.
2. The activation process is in two steps: binding of cyclin to cdk and then phosphorylation of cdk cyclin.
3. They are activated when cdks sends signals to cell that is pass already into the next stage of the cell cycle.
4. They are inactivated by the combination of P21 and Thr-14/Tyr-15 phosphorylation after uv induced DNA damage.
5. Changes are seen in target protein level when cdks level rises.
6. The targets are protein that promotes cell divisions.
Explanation:
The best and most correct answer among the choices provided by your question is the third choice or letter C.
Plant cells are usually box-shaped, while animal cells tend to be irregularly shaped because u<span>nlike plant cells, animal cells lack a cell wall. </span>
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D.
Viruses are not considered to be living organisms but they can function inside living cells and multiply by using things in the cells. They can cause diseases in living organism and studying them is important in the medical field.
Answer: Animals are able to identify specific types of smell through specialised receptors that absorb a particular type of energy and transform such energies into action potential.
Stimuli in the environment also active specialised receptors in animals.
The sensory of animals are not fully developed like those in humans ,they therefore follow different pathways.
Therefore very few sensory cells generate active potential.
Explanation:There are different types of action potential for each sensory for the central nervous system to work with.
