Study Set Content:
1- Flashcard

are organic catalysts produced by living organisms.

ENZYMES

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2- Flashcard

Enzymes are_____that functions as biological catalysts

proteins

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3- Flashcard

a substance that speeds up a chemical reaction and is not changed by the reaction)

Catalyst

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4- Flashcard

usually end in “

ase “ or “ in “

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5- Flashcard

discovered in ___ in yeasts

1900

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6- Flashcard

in human cells

40,000

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7- Flashcard

controls almost every metabolic reaction in living organism.

ENZYMES

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8- Flashcard

PROPERTIES

Enzymes are

colloids

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9- Flashcard

Soluble in water and dilute alcohol but are precipitated by

concentrated alcohol.

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10- Flashcard

Most enzymes act best at temperatures between

35 and 400C

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11- Flashcard

Certain heavy metals, ____retard the enzyme’s activity

formaldehyde and free iodine

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12- Flashcard

Each enzyme speeds up only

1 kind of reaction

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13- Flashcard

Possess an active site such as a ____ in the molecule onto which other substrate molecules can bind to form enzyme-substrate complex.

cleft

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14- Flashcard

their presence does not affect the nature and properties of the

end product

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15- Flashcard

Sensitive to change in

pH, temp, & substance concentrate

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16- Flashcard

FACTORS THAT AFFECT ENZYME ACTIVITY

 TEMPERATURE

 pH

 ENZYME CONCENTRATION

 SUBSTRATE CONCENTRATION

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17- Flashcard

The specific action of an enzyme with a single substrate can be explained using a

Lock and Key analogy

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18- Flashcard

first postulated in 1894 by

Emil Fischer.

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19- Flashcard

In this analogy, the lock is the enzyme and the key is the substrate. Only the correctly sized ____fits into the____ of the lock (enzyme).

key (substrate), key hole (active site), lock (enzyme).

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20- Flashcard

The basic mechanism by which enzymes catalyze chemical reactions begins with the binding of the____ (or substrates) to the active site on the enzyme.

substrate

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