Lactase and carbonic anhydrase are examples of what type of substance? a. substrate b. reactant c. product d. enzyme

D. enzyme

Explanation:

Lactase and carbonic anhydrase are enzymes.

D.enzyme

Explanation:

The enzymes are the macromolecules which functions as catalysts in the chemical reactions occurring in the biological systems. The enzymes speed up the reaction. The molecules over which the enzymes act are called as the substrates and these substrates are covered by the enzymes into products.  

Lactase is an enzyme which is located in the borders of the small intestine of humans and animals. The function of lactase is to conduct the complete digestion of lactose into sugar, the sugar is the simple substance which a body can digest easily.  

Carbonic anhydrase is the enzyme that causes the inter-conversion of substrates like carbon dioxide and water into carbonic acid, bicarbonate ions and protons.

the answer is d (apex) good luck : ))

step 1 ammonium can be absorbed by plants, but some is converted into nitrates which are better for plants to absorb. this is called nitrification. 2. step 2 the deer eats the plants and uses the nitrogen-containing proteins for cell growth. 3. step 3 bacteria in the soil conduct nitrogen fixation to convert nitrogen gas from the atmosphere into ammonium. 4. step 4 some of the nitrates are absorbed back into plants, but denitrification breaks down the nitrates into nitrogen gas released back into the atmosphere. 5. step 5 nitrogen is found in the urine, which gets broken down into ammonium through the process of ammonification. 6. step 6 plants absorb the ammonium and begin assimilation, the process to add the nitrogen to protein.