Enzymes are colloidal proteins having catalytic properties. Buchner was awarded Nobel Prize for isolating enzyme zymase from yeast. Sumner catalyzes the first enzyme urease from jack beans. Some similarities between enzyme and catalyst -both remain unchanged during the reaction, both are required in minute quantity, both do not initiate any reaction, both are short-lived compounds and both lower the activation energy. Some differences between enzyme and catalyst- enzymes are protein in nature whereas catalyst is minerals, enzymes catalyzed specific reaction whereas catalysts catalyze a large number of reactions, enzymes are very sensitive to PH and temperature whereas categories are less sensitive to PH and temperature. So take this quiz on enzyme and increase your knowledge about it.
1. Who coined the term enzymes?
A. Kuhne
B. Sumner
C. Altman
D. Buchner
2. Which one of the following physiological active, functional proteins?
A. Vitamin
B. Collagen
C. Ossein
D. Enzymes
3. Enzyme bromelain is found in...
A. Papaya
B. Pineapple
C. Guava
D. Apple
4. If enzyme catalyzes only specific reaction they are said to be...
A. Absolute substrate specific
B. Absolute reaction specific
C. Absolute group specific
D. Absolute chemical specific
5. The turnover number actually determines the effect of the enzyme on...
A. Denaturation rate
B. Reaction rate
C. Renaturation rate
D. None of the above
6. No cell can live without...
A. Fats
B. Proteins
C. Enzymes
D. Pigments
7. Many enzymes are secreted in an inactive form to protect...
A. Cell DNA
B. Mitochondria
C. Cell membrane
D. Cell protein
8. Lock and key hypothesis put forward by...
A. Koshland
B. Kuhne
C. Sumner
D. Emil Fischer
9. The enzyme exists in the cells as...
A. Solid
B. Crystals
C. Colloid
D. Solution
10. Which are not a trait of enzymes?
A. Proteinaceous nature
B. Specific in nature
C. Speed up of biochemical reaction
D. Used up in reaction
11. Enzyme functional in cells are called...
A. Endoenzymes
B. Apoenzymes
C. Exoenzymes
D. Coenzymes
12. Nomenclature of the enzyme consists of...
A. Only reaction name
B. Only product name
C. First product then reaction name
D. First reaction and then product name
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