Question

any factor that changes the shape of an enzyme can affect the enzymes activity. which of the following two factors affect an enzymes operation the most?
a. amount of light and pressure
b. temperature and ph
c. blood glucose level and ph
d. amount of light and temperature

the graph below shows the relationship between ph and three different digestive enzymes.
pepsin
a
b
c
d
salivary amylase
arginase
enzyme activity
1 2 3 4 5 6 7 8 9 10 11 12
acidic
ph
basic

pepsin is found in the stomach. salivary amylase is found in the mouth. and arginase is found in the liver. what does the graph indicate about the relative acidity of these three locations?
a. the stomach is more acidic than the liver, which is more acidic than the mouth.
b. the mouth is more acidic than the stomach, which is more acidic than the liver.
c. the liver is more acidic than the mouth, which is more acidic than the stomach.
d. the stomach is more acidic than the mouth, which is more acidic than the liver.

glucose is an example of which of the following types of organic molecule?
a. protein
b. nucleic acid
c. lipid
d. carbohydrate

Explanation:

1. Enzymes are proteins and their activity is highly influenced by temperature and pH. Extreme values of either can denature the enzyme, changing its shape and reducing its functionality. Light and pressure have minimal direct impact on enzyme - operation compared to temperature and pH. Blood glucose level affects metabolic processes but not as directly as temperature and pH on enzyme shape and activity. So, for the first question, temperature and pH are the most influential factors.
2. For the second question, pepsin has its optimal activity at a lower (more acidic) pH range compared to salivary amylase and arginase. Since pepsin is in the stomach, salivary amylase in the mouth, and arginase in the liver, the graph indicates that the stomach is more acidic than the mouth, which is more acidic than the liver.
3. Glucose is a monosaccharide, which is a type of carbohydrate. Proteins are made of amino - acids, nucleic acids are composed of nucleotides, and lipids are a diverse group including fats, oils, etc., but glucose does not fall into these categories.

Answer:

1. B. temperature and pH
2. A. The stomach is more acidic than the liver, which is more acidic than the mouth.
3. D. carbohydrate