Question

what is the relationship between enzymes and their substrates?enzymes work on any available substratesubstrates change the shape of enzymes permanentlyenzymes and substrates fit together like a lock and keysubstrates destroy enzymes after reactionwhat happens to lactase enzyme production when mammals are weaned from their mothers milk?it increases significantlyit remains constantit stops completelyit varies by individualin the digestive system, where does carbohydrate digestion begin?stomachsmall intestinemouthlarge intestinewhat makes enzymes specific to certain reactions?their active site shapetheir molecular sizetheir temperaturetheir ph level

Explanation:

• Enzymes are highly specific. The lock - and - key model explains that enzymes have an active site whose shape is complementary to the shape of their specific substrate. So, enzymes and substrates fit together like a lock and key.
• When mammals are weaned from their mother's milk, the production of lactase (the enzyme that digests lactose in milk) stops completely because there is no longer a need for it.
• Carbohydrate digestion begins in the mouth. Salivary amylase in saliva starts breaking down carbohydrates.
• Enzymes' specificity to certain reactions is due to their active site shape. Only substrates with a complementary shape can bind to the active site.

Answer:

• Enzymes and substrates fit together like a lock and key.
• It stops completely.
• Mouth.
• Their active site shape.