What is the main difference between purines and pyrimidines?

Identify any four organelles that should be present in the eukaryotic organism and describe the function of each organelle

Which statement correctly identifies the scientific question and describes why the question is scientific? question 1 refers to the supernatural.question 2 reflects a moral or social value.question 3 refers to something that can be measured.question 4 reflects a question that can’t be observed.

When lactate builds up in a runners muscles it causes a burning sensation what causes this to occur