living cells can be the trigger for cancers. What is the missing word in this sentence?

Which of the following statements is true of enzymes? a)they dont provide an active site for substrates to bind in a reaction b)they act on a specific type of substrate in a reaction c)they unusable after a reaction d)they change shape after a reaction

What feature of cell theory is best demonstrated in the image

This is a scaffolding of protein fibers that us sell keep it shape in a cell division and cell movement