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Biochemistry Lab > Enzymes > Flashcards

Enzymes Flashcards

enzymes + nucleic acid

1
Q

a biomolecule group of mostly of

PROTEINS

A

enzymes

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2
Q

A substance that increases the rate of a chemical

reaction without being itself changed in the process.

A

catalyst

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3
Q

Once an enzyme binds to a substrate and catalyzes

the reaction, the enzyme is?

A

released

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4
Q

it helps to speed up chemical reactions

A

enzymes

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5
Q

Enzymes won’t change after the reaction takes place, it is

recycled! TRUE or FALSE?

A

TRUE

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6
Q

Enzymes are very specific and will only catalyze one

specific chemical reaction? true or false

A

true

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7
Q

Enzymes are mostly?

A

globular proteins

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8
Q

Enzymes react at mild reaction conditions at ?

A

37C

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9
Q

The names of most enzymes end in?

A

ase

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10
Q

Enzymes Lowers Reaction’s Activation Energy. true or false?

A

true

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11
Q

A three-dimensional cavity of the enzyme with specific chemical properties to accommodate the
substrate where the reaction takes place.

A

active site

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12
Q

If we keep the concentration of substrate constant and increase the concentration of enzyme, the rate?

A

increases linearly

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13
Q

there is great competition

for the active sites and the rate of reaction is LOW

A

low enzyme concentration

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14
Q

there are more active

sites and the reaction can proceed at a FASTER rate

A

high enzyme concentration

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15
Q

If we keep the concentration of enzyme constant and
increase the concentration of substrate, we get an
entirely different type of curve

A

saturation curve

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16
Q

substrate molecules are bound to

all available active sites of the enzymes

A

saturation point

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17
Q

Too high temperature above the optimum temperature

cause the enzymes to be?

A

denatured

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18
Q

As temperature rises, enzyme activity also speeds up? True or False

A

True

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19
Q

All enzymes don’t have a certain narrow range of pH where they perform best. True or False?

A

False

20
Q

Most active between?

A

4.5-8

21
Q

Extremes of pH can affect the enzyme by denaturing it or affecting the charge of critical amino acids in its active
site? true or false

A

true

22
Q

It is an enzyme that catalyzes the hydrolysis of starch?

A

amylase

23
Q

Largest salivary gland found inside the cheeks

A

Parotid gland

24
Q

This enzyme is found in human saliva and has a shape that can recognize the polysaccharide
amylose (starch)

A

salivary amylase

25
Q

A polysaccharide
composed of glucose
subunits.

A

starch

26
Q

Iodine Test = Blue-black

A

presence of starch

27
Q

Iodine Test = Yellowish brown

A

presence of amylase

28
Q

an enzyme found in most cells and serves to break down peroxides

A

catalase

29
Q

Enzyme that catalyzes the reaction which hydrogen peroxide is decomposed to water and oxygen

A

catalase

30
Q

a waste product of cellular activity. It is poisonous to cells.

A

hydrogen peroxide

31
Q

if you ever applied hydrogen
peroxide to an open cut. The white foam produced is
due to the action of the enzyme on the hydrogen
peroxide releasing oxygen; the reaction is faster than
without the catalyst. True or False.

A

True

32
Q

Nucleic acids also known as?

A

polynucleotides

33
Q

a macromolecule composed of chains of

monomeric nucleotides.

A

nucleic acid

34
Q

monomers of nucleic acid

A

nucleotides

35
Q

3 parts of nucleotide?

A

nitrogenous base, sugar and phosphate

36
Q

2 types of nucleic acid BASES?

A

pyrimidines and purines

37
Q

3 types of pyrimidine bases?

A

cytosine, thymine, uracil

38
Q

2 common purines bases?

A

adenine and guanine

39
Q

sugar component of RNA?

A

D-ribose

40
Q

sugar component of DNA?

A

2-deoxy-d-ribose

41
Q

The third component of nucleic acids is?

A

phosphate

42
Q

When nucleoside bond with a phosphate ester the

result compound is a?

A

nucleotide

43
Q

does the backbone in DNA consists of alternating
deoxyribose(Sugar) and phosphate groups?
True or False?

A

True

44
Q

2 most common types of nucleic acids

A

DNA and RNA

45
Q

one of the major biomolecules in living cells have
no common structure unlike proteins, carbohydrates,
and nucleic acids

A

Lipids

Biochemistry Lab (3 decks)

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