1. What is the enzyme classification number for dichloromethane dehalogenase and

Question

1. What is the enzyme classification number for dichloromethane dehalogenase and what type of enzyme is it?

A. 4.5.1.3; transferase

B. 4.5.1.3; lyase

C. 5.5.1.11; lyase

D. 5.5.1.11; isomerase

2. What is the subclass for catalase and which organism contains the catalase with the lowest temperature optimum?

A. 1; Pencillium cyclopium

B. 11; Pencillium cyclopium

C. 1; Homo sapiens

D. 13; Homo sapiens

3. Hydrogen peroxide is used as a substrate by enzymes from which of the following classes of enzymes?

A. oxidoreductases and transferases

B. oxidoreductases

C. oxidoreductases and hydrolases

D. transferases and lyases

4. Which of the following enzymes has the lowest pH optimum?

A. acid phosphatase from Aspergillus ficuum

B. shikimate dehydrogenase from Capsicum annum

C. shikimate dehydrogenase from Gluconobacter oxydans

D. acid phosphatase from Aspergillus niger

5. What are the activating compound and products for 4.5.1.3 from Methylobacterium extorquens?

A. Glutathione is the activating compound; formaldehyde and chloride are products.

B. Glutathione is the activating compound; dichloromethane and water are products.

C. Valinomycin is the activating compound; formaldehyde and chloride are products.

D. Valinomycin is the activating compound; dichloromethane and water are products.

6. ____________ and _____________ are alternative names for isomerases.

A. Racemases, epimerases

B. Racemases, hydrolases

C. Cis-trans isomerases, esterases

D. Glycosydases, esterases

7. According to enzyme nomenclature rules, formate-tetrahydrofolic acid ligase is an alternative name for formate-tetrahydrofolate ligase.

A. True.

B. False.

8. Nitrilase catalyzes

A. nitrile amidation reaction.

B. nitrile hydrolysis reaction.

C. nitrate hydrolysis reaction

. D. nitrile reductase reaction.

9. How many enzymes are known to be involved in purine metabolism pathways in all life?

10. The enzyme preQ1 synthase is an oxidoreductase. What does it oxidize and what does it reduce?

Explanation / Answer

1). B. 4.5.1.3; lyase

The Enzyme Commission number (EC number) of dichloromethane dehalogenase is,  4.5.1.3. It is a lyase enzyme that is involved in the synthesis of formaldehyde.

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