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Enzymes speed up chemical reactions by ________________.

Many antibiotic drugs such as Penicillin blocks the active site of a bacterial enzyme. Such drugs are therefore represent examples of ______________. 

What structures in land plants allow carbon dioxide to enter & oxygen to be released?

What would happen if activation energy barriers didn’t exist?

Select the true statement regarding metabolism in plant and animal cells.

Substrates of photosynthesis are 

Anaerobic respiration has only two stages, Glycolysis and fermentation and it occurs entirely within the cytoplasm. There is no involvement of mitochondria. 

What two energy products are produced from the light reaction? Hint: these two products provide energy for the dark reaction.

The part of an enzyme to which the substrate(s) binds is called___________________.

Which enzyme is critically important in dark reaction (Calvin cycle) of photosynthesis?