Enzymes and Their Functions Quiz

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Enzymes in biology: key concepts

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Hasan Thijeel

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Enzymes and Their Functions Quiz


Enzymes and Their Functions QuizVersion en ligne Enzymes in biology: key concepts par Hasan Thijeel 1 What is an enzyme? a A molecule that slows reactions b A catalyst that is alive and multiplies c A protein that speeds up a chemical reaction without being used up d A carbohydrate that stores energy 2 Where does the substrate bind in an enzyme? a The enzyme’s tail end b The product site c The active site on the enzyme d The allosteric site 3 Why does an enzyme typically act on only one substrate type? a All substrates fit equally b Temperature determines specificity c Only one substrate can exist at a time d The active site shape fits only that substrate 4 What is the approximate optimum temperature for many human digestive enzymes? a -20°C b Around 37°C c 0°C d 100°C 5 Which statement best defines denaturation? a Enzyme replication in the cell b Enzyme production increase c Substrate becoming an enzyme d Unfolding of the enzyme causing loss of active site shape 6 Which enzyme breaks down starch? a Pepsin b Lipase c Protease d Amylase 7 Which enzyme digests proteins in the stomach? a Lipase b Maltase c Protease/pepsin d Amylase 8 Which enzyme breaks down fats (lipids)? a Amylase b Lactase c Lipase d Protease 9 True or False: Enzymes are living cells that are consumed in reactions. a Only in heat b Sometimes c True d False 10 What happens when an enzyme is exposed to heat or pH far from optimum? a It multiplies b It becomes more active indefinitely c Substrate becomes enzyme d The enzyme can denature and lose activity Feedback 1 Enzymes are biological catalysts, usually proteins, that speed reactions without being consumed. 2 The substrate fits into the enzyme's active site, forming the enzyme–substrate complex. 3 Specificity arises because only matching shapes fit the active site. 4 Most human enzymes function best near normal body temperature (~37°C). 5 Denaturation alters structure, destroying the active site and activity. 6 Amylase specifically hydrolyses starch into sugars. 7 Pepsin (a protease) is active in the acidic stomach to break down proteins. 8 Lipase hydrolyses fats into fatty acids and glycerol. 9 Enzymes are typically non-living proteins and are not consumed in reactions. 10 Extreme conditions disrupt structure, reducing or destroying function.

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Enzymes and Their Functions Quiz

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Créé par

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Enzymes and Their Functions QuizVersion en ligne

par Hasan Thijeel

What is an enzyme?

Where does the substrate bind in an enzyme?

Why does an enzyme typically act on only one substrate type?

What is the approximate optimum temperature for many human digestive enzymes?

Which statement best defines denaturation?

Which enzyme breaks down starch?

Which enzyme digests proteins in the stomach?

Which enzyme breaks down fats (lipids)?

True or False: Enzymes are living cells that are consumed in reactions.

What happens when an enzyme is exposed to heat or pH far from optimum?

Feedback