Enzyme Technology Mock Test 8

10%

Question 1 of 10

1. Many enzymes are not totally specific for their natural substrates.

True

False

Question 1 of 10

Question 2 of 10

2. Which of the following doesn’t cause enzyme inactivation?

Proteolysis

Sub-optimal pH

Heat

Centrifugation

Question 2 of 10

Question 3 of 10

3. Which of the following is not a basis for classifying enzymes as regarded by the Food Additives and Contaminants Committee (FACC) of the Ministry of Agriculture, UK?

Acceptable for use in food

It is not possible to express an opinion as to their acceptability for use in food

There should be a market for the biosensor

Definite or probable toxicity and which ought not to be permitted for use in food

Question 3 of 10

Question 4 of 10

4. Which of the following is not added as a preservative for liquid enzyme preparation?

Antibiotic

Carboxymethylcellulose

Benzoic acid esters

Thiols

Question 4 of 10

Question 5 of 10

5. _______________ is a reaction which involve carboxyl group exchange between esters and carboxylic acids by use of transferases.

Isomerization

Transesterifications

Alcoholyses

Acidolyses

Question 5 of 10

Question 6 of 10

6. What is represented in the following diagram?

Protein engineering cycle

Transcription

Replication

Site directed mutagenesis

Question 6 of 10

Question 7 of 10

7. Which of the following is not Generally Regarded as Safe (GRAS) by the FDA, USA?

Cannabidiol

Trypsin

Catalase

Papain

Question 7 of 10

Question 8 of 10

8. Cocoa butter may be produced by using ________ acting as transacylases.

lipases

papain

transferase

dextransucrase

Question 8 of 10

Question 9 of 10

9. Which of the following is not true for coenzymes?

Coenzymes may be derivatized for adequate immobilization and regeneration

They are referred to as artificial enzymes

Coenzymes may be immobilized/regenerated with the use of whole-cell systems

Membrane reactors may be used to immobilize the coenzyme

Question 9 of 10

Question 10 of 10

10. ____________ is an art and is a method used to stabilize enzyme preparations.

Chromatography

Formulation

Filtration

Centrifugation

Question 10 of 10