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The enzyme(s) called ____________ break(s) down the substrate called_________________.

A.

lactose; lactase

B.

lipases; micelles

C.

peptidases; proteins

D.

lactase; glucose

Answer and Explanation

The Correct Answer is C

A. Lactose; lactase: Lactase is the enzyme that breaks down lactose, not the other way around. 

 

B. Lipases; micelles: Lipases break down lipids (fats) into fatty acids and glycerol, not micelles. Micelles are formed as part of the digestion process but are not the substrate for lipases. 

 

C. Peptidases; proteins: Peptidases (or proteases) break down proteins into smaller peptides and amino acids. This is the correct answer.

 

D. Lactase; glucose: Lactase breaks down lactose into glucose and galactose, not just glucose. 


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View Related questions

Correct Answer is A

Explanation

A. The bicarbonate, phosphate, and protein: The major chemical buffer systems in the body are the bicarbonate, phosphate, and protein buffer systems.

B. Glucose is not a buffering system; it is a primary energy source.

C. Magnesium is a mineral with various physiological roles but not a major chemical buffer system.

D. Creatinine is a waste product of muscle metabolism, not a buffer system.

Correct Answer is D

Explanation

A. Amino acids; proteins: Amino acids are the end products of protein digestion, not the substrates that are broken down.

B. Polysaccharides; amino acids: Polysaccharides are broken down into simple sugars (monosaccharides), not amino acids.

C. Proteins; nucleotides: Proteins are broken down into amino acids, not nucleotides. Nucleotides are components of nucleic acids, not proteins.

D. Nucleic acids; nucleotides: Nucleic acids (such as DNA and RNA) are broken down into nucleotides.

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