Do all enzymes have the same optimum temperature? Yes or no Explain why.?

No, because they are not chemically identical.

Inuit on the northpole have the exact same enzymes as Igbo in Nigeria

No, enzymes require a certain fat complex to build to work in the snow.

No. All enzymes operate within a particular temperature range, and are so named according to their environmental tolerances (eg. mesophiles (medium-loving) operate within the temperature range of 20-45 degrees C).

With reference as to why enzymes are only able to operate within their particular temperature range relates to the biochemical composition of the protein structure. High temperatures disturb the weak hydrogen bonds and non-polar interactions which determine protein structure. Due to the change in protein structure, the enzyme s active site is no longer specific (to its substrate, or in some cases multiple substrates) and thus, an enzyme-substrate complex cannot be formed- the enzyme is denatured.

And so, to answer the second part of the question, the reason why enzymes don t all have the same optimum temperature is due to the biochemical composition of the protein, with particular reference to hydrogen bonding.

Of course not. There are organisms that live in icy waters, and their enzymes must work under such cold conditions. Enzymes found in tropical animals, OTOH, may not work at low temperatures. Enzymes work due to their 3 dimensional structure, so enzymes that operate at different temperatures, even if they are involved in the same reactions, are different in 3 dimensional shape.

No, some bacteria grow in snow. You should have got a whiff of the sulfurous bacteria in my lab cultured from snow. The bacteria need to enzymes for all sorts of biological processes and they work well in the frigid cold.

No, they do not. The examples generally given to students are enzymes that would function in mammals, including humans. The range of temperatures in most mammals is 36-40 °C. In birds temperatures are generally higher, say 40-42 °C. Consequently, the optimum temperature in birds would in generally be higher than in mammals.

There are bacteria that live in hot springs. At the temperature that is optimal for a human enzyme theirs would not function. Their enzymes will have optimal temperatures that are very high. On the other hand bacteria found in the Arctic would have their enzymes denatured even at the lowest temperature human enzymes will function. Their enzymes work best at very low temperatures.

No, they do not. Thermophiles, for example, can grow in extreme temperatures unlike many other organisms. Their enzymes function optimally at these extreme temperatures, and have proven useful for techniques such as PCR (polymerase chain reaction).