I assume that this is your question with the options:
Proteins scan chromosomes for damage during:
A) the G1 checkpoint
B) Beginning of the synthesis phase
C) Apoptosis phase
D) G2 checkpoint
E) Metaphase checkpoint.
Answer:
The answer is option A): G1 checkpoint.
Explanation:
During the internal checkpoints for regulation of a cell cycle, proteins usually scan chromosomes for damage to DNA and evaluate other external factors at the G1 checkpoint in order to ascertain whether conditions are inadequate. If conditions are inadequate and damages exist, cells will not be allowed to continue to the next phase.
I believe the answer to your question would be: Homeostasis.
Explanation:
I'm guessing the answer is oxygen.
Answer:
Pinocytosis is the mechanism by which living cells consume liquid droplets. Endocytosis is the general mechanism by which cells ingest foreign substances and collect them in special membrane-bound vesicles within the cell. Pinocytosis is one form of endocytosis.