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Biology 12 > Enzymes > Flashcards

Enzymes Flashcards

1
Q

Reaction rate will increase with the addition of more substrate until all enzyme active sites are _____

A

Saturated

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2
Q

Components of the body that detect temperature changes?

A

Thermoreceptors

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3
Q

The enzyme Maltese decomposes the sugar _____

A

Maltose

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4
Q

This enzyme catalyze the decomposition of hydrogen peroxide.

A

Catalase

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5
Q

If your body temp. Drops below normal, your brain will send signals and u start to _____

A

Shiver

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6
Q

Components of the body which detect light

A

Photoreceptors

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7
Q

When an enzyme product binds to the ______ site it causes a change to the shape of the active site

A

Allosteric

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8
Q

______ glands secrete hormones directly into the blood

A

Endocrine gland

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9
Q

____ glands secrete hormones into ducts

A

Exocrine gland

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10
Q

An ___ Ocurs to correct the situation when a receptor detects that conditions on the body are out of the normal range

A

Adaptive response

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11
Q

The idea that the active site modified its shape as it forms the enzyme substrate complex

A

Induced fit

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12
Q

Every enzyme has an optimal ____ at which it will work in the body

A

PH

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13
Q

Enzymes require an additional substance called a ____

A

Co-enzyme

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14
Q

Co-factors can belong to this group of substances

A

Metals

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15
Q

Some enzymes are ___ because each enzyme catalyze only one type of reaction

A

Specific

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16
Q

Enzyme activity can be reduced when temperatures become to ____. This can be reversed

A

Cold

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17
Q

A biological catalyst is called an ______

A

Enzyme

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18
Q

A word used to describe a substance which will combine with the active site of an enzyme during reaction

A

Substrate

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19
Q

Negative feedback _____ occurs when the increase in the enzyme (product) catalyze reaction causes the rate of reaction to slow by inhibiting the enzyme

A

Inhibition

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20
Q

Maintaining the internal environment of the body at equilibrium

A

Homeostasis

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21
Q

The model that considers the substrate and active site to be a perfect fit.

A

Lock and key

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22
Q

Components of the body which detect chemical changes

A

Chemoreceptors

23
Q

_____ like mercury and lead can cause the denaturation of enzymes

A

Heavy metal

24
Q

The protein portion of an enzyme is called the ____

A

Apoenzyme

25
Q

Components of the body which detect changes in blood pressure

A

Pressoreceptors

26
Q

Insulin is an example of a ____ hormone

A

Peptide

27
Q

Blood pressure, blood pH, and blood glucose levels are all part of ____ feedback

A

Negative

28
Q

The ____ energy that is required to get a chemical reaction started

A

Activation

29
Q

Metabolic rate is controlled by the hormone thyroxine which is produced by the ____ gland

A

Thyroid

30
Q

An organic, but non-protein substance which place a role in forming a functioning enzyme

A

Co-factor

31
Q

In order for your body to cool, blood vessels near the surface of your skin will ____

A

Dilate

32
Q

____ feedback systems are very rare in humans but are present in situations like childbirth

A

Positive

33
Q

All enzymes end in the suffix ____

A

ASE

34
Q

This element is required for thyroxin

A

Iodine

35
Q

____ are chemical messengers that help cells communicate with eachother

A

Hormones

36
Q

The receptors for regulating body temperature are in this part of the brain

A

Hypothalamus

37
Q

This happens to a protein when it changes shape due to heat

A

Denature

38
Q

The body’s sensory receptors are connected to the _____

A

Nervous system

39
Q

Organic but non-protein co factors are often derived from this substance

A

Vitamins

40
Q

Enzyme activity can be greatly reduced when it gets to ____. This situation is irreversible

A

Hot

41
Q

This enlargement of the neck to 10 because due to Hypothyroidism or hyperthyroidism

A

Goitre

42
Q

Lipid based hormones are composed of _____

A

Steroids

43
Q

The portion of an enzyme that binds with the substrate

A

Active site

44
Q

A ____ Increases the rate of a chemical reaction by lowering the activation energy

A

Catalyst

45
Q

A solution with a higher _____ Will provide a faster reaction rate than a solution with one that is lower

A

Concentration

46
Q

A factor affecting the rate of a chemical reaction

A

Temperature

47
Q

Many ____ Our inhibitors that permanently blind to the active site of enzymes, rendering them in active

A

Poisons

48
Q

The term metabolic ____ Refers to a sequence of enzyme catalyzed chemical reactions which are all linked to each other

A

Pathway

49
Q

This word refers to the combination of all chemical reactions that are occurring within an organism

A

Metabolism

50
Q

Increasing this factor will increase the rate of a chemical reaction

A

Surface area

51
Q

Respond to mechanical forces

A

Mechanoreceptors

52
Q

Too little thyroxin

A

Hypothyroidism

53
Q

Too much thyroxin

A

Hyperthyroidism

54
Q

Thyroid gland fails to develop during infancy this happens

A

Cretinism

Biology 12 (1 decks)

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