Question

1. a process that occurs in the human body is shown in the diagram above. what would happen if a temperature change caused the shape of the active site to be altered?

a. the dipeptide would digest faster
b. the dipeptide would digest slower or not at all
c. the amino acids would combine faster
d. the amino acid would combine slower or not at all

1. the diagram above illustrates a biochemical process that occurs in organism the substance labeled catalyst is also known as

a. hormone
b. products
c. enzyme
d. a starch

1. enzymes are

a. nucleic acid
b. proteins
c. carbohydrates
d. lipids

Explanation:

1. Enzymes are highly specific in their shape - substrate interaction. The active site of an enzyme has a specific shape that fits the substrate (like a lock - key mechanism). If the shape of the active site is altered (e.g., by temperature change), the substrate (dipeptide in this case) will not be able to bind properly. Since the enzyme - substrate complex cannot form effectively, the digestion (a catabolic reaction where dipeptide is broken down) will slow down or stop.
2. Enzymes are biological catalysts. They speed up biochemical reactions in organisms. In the diagram, the substance that acts as a catalyst (lowering the activation energy of the reaction where sugar is broken down) is an enzyme. Hormones are chemical messengers, products are the end - results of a reaction (like simple sugars here), and starch is a type of carbohydrate (a polymer of glucose).
3. Enzymes are proteins. Most enzymes are proteinaceous in nature, although there are some RNA - based enzymes (ribozymes). Nucleic acids (like DNA and RNA) store genetic information. Carbohydrates are energy - providing molecules (e.g., glucose, starch). Lipids are involved in energy storage (e.g., fats), membrane formation (e.g., phospholipids), etc.

Answer:

1. b. The dipeptide would digest slower or not at all
2. c. Enzyme
3. b. Proteins