Answer:
enzymes loose their form in both unsuitable ph and temprature.
Explanation:
at very high tempratures enzyme molecules denatures due to high speed movements, at low tempratures enzymes works too slow to be useful enough.
low ph solotions contain lot of H+ and high ph solutions have few H+ , and the number of these H+ ions have polar effects on enzymes. some Enzymes like pepsin works perfect in acidic environment ( ph=2) while others might work at high ph or average ph( like Trypsin works well at ph=7).
They all have three pairs of chromosomes at both mitosis and ate first meiotic metaphase
The chromosomes migrate to the equator of the spindle apparatus, they line up in the middle. meta means middle
"Catalyst" isn't the proper term
It is Catalysis.
That is the answer