MSN 6050 Module 4 Quiz

Enzymes facilitate chemical reactions, but are destroyed in the process

• True

• False

Choose the correct answer:  Which of the following are functions of enzymes in the body?  Select all that apply.

• Break down complex molecules in the digestive system

• Hormone production

• Cell regulation& DNA replication

• Signal transduction

• All of the above

Match the enzymes with its function in the body.

• breaks down maltose to glucose in the saliva

• maltase

• breaks down lactose into glucose and galactose

• lipase

• breaks down starch in the saliva

• trypsin

• breaks down proteins into amino acids in the small intestine

• lactase

• catalyzes fat

• amylase

The optimal pH in the stomach is ____________ for enzymes to function best. 

The optimal pH of the intestines is _____________ for enzymes to function best.

Enzymes are biological catalysts that speed up or slow down reactions without being consumed in the reaction

• True

• False

Match the classes of enzymes with their function below.

Oxidoreductase

• remove atoms to form double bonds or add atoms to double bonds

• Lyases

• oxidation reduction reactions

• Transferases

• cleavage of bonds by addition of water

• Hydrolases

• move functional groups within a molecule

• Isomerases

• transfer of functional groups between molecules

• Oxidoreductase

Lactate dehydrogenase catalyzes the conversion of lactate to ___________ and back, converting NAD+ to NADH and back during the process.

In the nutrition pause, lactate dehydrogenase was discussed as a marker for various pathological conditions.  High levels of LDH can indicate tissue damage, whereas low can indicate hypoglycemia

• True

• False

What nutrient does the conversion of serine to glycine depend on as a cofactor?

• folate (THF)

• B6

• B1

• Vit C