15287372
Descrição
Quiz por Jessica Dewald, atualizado 27 dias atrás
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Criado por Jessica Dewald
aproximadamente 6 anos atrás
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Questão 1
Questão
An enzyme _____ the activation energy to speed up a chemical reaction.
Responda
-
stabilizes
-
raises
-
lowers
-
eliminates
Questão 2
Questão
An appropriate enzyme to catalyze a reaction involving the imaginary substance camelsine would be ___.
Responda
-
camelose
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cameline
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camelise
-
camelase
Questão 3
Questão
The charge of the oxygen atom that makes up water is slightly ___.
Responda
-
positive
-
negative
-
unstable
-
neutral
Questão 4
Questão
A substance that produces an excess of hydroxide (OH-) ions in water is a [blank_start]base[blank_end].
Responda
-
base
Questão 5
Questão
Water is classified as a [blank_start]polar[blank_end] molecule because it has a negatively charged oxygen and positively charged hydrogens.
Responda
-
polar
Questão 6
Questão
A substance that produces an excess of hydrogen (H+) ions in water is a(n) [blank_start]acid[blank_end].
Responda
-
acid
Questão 7
Questão
The term hydrophobic means water fearing.
Responda
- True
- False
Questão 8
Questão
The type of bond which holds water molecules to each other is called a [blank_start]hydrogen bond.[blank_end]
Responda
-
hydrogen bond
Questão 9
Questão
A pH of 7 signifies?
Responda
-
a salt solution
-
an acidic solution
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a neutral solution
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a basic solution
Questão 10
Questão
The polar compound which is the universal solvent and has the unique properties of adhesion, capillary action, and cohesion is [blank_start]water[blank_end].
Responda
-
water
Questão 11
Questão
Which of the following is NOT a property of water?
Responda
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nonpolar
-
cohesion
-
hydrogen bonding
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capillary action
-
adhesion
Questão 12
Questão
A protein catalyst that speeds up the chemical reaction within an organism
Responda
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homeostasis
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protein
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enzyme
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metabolism
Questão 13
Responda
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Substrate
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Product
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Enzyme
Questão 14
Questão
A water molecule is made up of [blank_start]2[blank_end] hydrogen atoms and [blank_start]1[blank_end] oxygen atom.
Responda
-
1
-
2
-
1
-
2
Questão 15
Questão
Water’s ability to stick to itself is [blank_start]cohesion[blank_end],
Responda
-
cohesion
Questão 16
Questão
Water striders have the ability to walk on water because of [blank_start]surface tension[blank_end].
Responda
-
surface tension
Questão 17
Questão
Which property of water does NOT play a role in water's ability to climb the xylem of a plant?
Responda
-
cohesion
-
adhesion
-
surface tension
-
capillary action
Questão 18
Questão
Water can hang as a dew drop from the underside of a leaf due to [blank_start]adhesion[blank_end].
Responda
-
adhesion
Questão 19
Questão
Water is known as a universal solvent because
Responda
-
It dissolves so many substances
-
It exists in all three states on Earth
-
It can cling to fibers of cloth and paper
-
Its frozen form floats on its liquid form
Questão 20
Questão
The properties of water make it essential for supporting life on Earth. One of its properties helps it to act as a buffer for temperature changes, which stabilizes the environment for creatures that live in water. Which property is this?
Responda
-
High heat of vaporization
-
High specific heat
-
Surface tension
-
Cohesion
Questão 21
Questão
What binds to the enzyme at the active site?
Responda
-
Product
-
Substrate
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Inhibitor
-
Competitor
Questão 22
Questão
What environmental conditions can cause an enzyme to denature?
Responda
-
Salinity
-
pH
-
Temperaure
-
Substrate concentration
Questão 23
Questão
Most Enzyme names end in -ase.
Responda
- True
- False
Questão 24
Questão
Enzymes are not reusable after a chemical reaction.
Responda
- True
- False
Questão 25
Questão
Inhibitors that bind to an enzyme and alters the shape of the active site are called [blank_start]noncompetitive[blank_end], while inhibitors that bind and block active site are called [blank_start]competitive[blank_end].
Responda
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Noncompetitive
-
Competitive
-
Noncompetitive
-
Competitive
Questão 26
Questão
The optimal pH of Chymotrypsin is [blank_start]7.5[blank_end].
Responda
-
7.5
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