For each of the diagrams below, indicate which enzyme catalyzes which reaction s

Question

For each of the diagrams below, indicate which enzyme catalyzes which reaction step by placing the number of the enzyme (from the list provided) in the proper position on the reaction sequence provided

A. Step-wise reduction of chlorinated ethene compounds by reduction (removal of a single chlorine atom) is accomplished by the following enzymes in Dehalococcoides:

1. Vinyl chloride reductase

2. Trichloroethene reductase

3. Dichloroethene reductase

Reaction Sequence:

Enzymes that break down starch molecules into simpler sugars (disaccharides and monosaccharides) work in a variety of ways on one form of starch known as amylose. One such action occurs by the first enzyme cleaving off disaccharides at the end of the chain, and then a subsequent enzyme breaks each disaccharide into monosaccharides (single-ring sugars)

1. Maltose hydrolase

2. Beta ()-amylase

Reaction Sequence:

Amylose    Maltose glucose

Explanation / Answer

Answer

1. Trichloroethane ---- (Trichloroethene reductase)--- Dichloroethene ---- (Dichloroethene reductase) -- Vinyl chloride ----- (Vinyl chloride reductase) --- Ethene

2. Amylose ---- (Beta ()-amylase) ----   Maltose ---- (Maltose hydrolase) glucose

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