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Water Properties & Enzymes Practice Test

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9th grade Biology Quiz on Water Properties & Enzymes Practice Test, created by Jessica Dewald on 26/09/2018.
Jessica Dewald
Quiz by Jessica Dewald, updated 27 days ago
Jessica Dewald
Created by Jessica Dewald about 6 years ago
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Resource summary

Question 1

Question
An enzyme _____ the activation energy to speed up a chemical reaction.
Answer
  • stabilizes
  • raises
  • lowers
  • eliminates

Question 2

Question
An appropriate enzyme to catalyze a reaction involving the imaginary substance camelsine would be ___.
Answer
  • camelose
  • cameline
  • camelise
  • camelase

Question 3

Question
The charge of the oxygen atom that makes up water is slightly ___.
Answer
  • positive
  • negative
  • unstable
  • neutral

Question 4

Question
A substance that produces an excess of hydroxide (OH-) ions in water is a [blank_start]base[blank_end].
Answer
  • base

Question 5

Question
Water is classified as a [blank_start]polar[blank_end] molecule because it has a negatively charged oxygen and positively charged hydrogens.
Answer
  • polar

Question 6

Question
A substance that produces an excess of hydrogen (H+) ions in water is a(n) [blank_start]acid[blank_end].
Answer
  • acid

Question 7

Question
The term hydrophobic means water fearing.
Answer
  • True
  • False

Question 8

Question
The type of bond which holds water molecules to each other is called a [blank_start]hydrogen bond.[blank_end]
Answer
  • hydrogen bond

Question 9

Question
A pH of 7 signifies?
Answer
  • a salt solution
  • an acidic solution
  • a neutral solution
  • a basic solution

Question 10

Question
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].
Answer
  • water

Question 11

Question
Which of the following is NOT a property of water?
Answer
  • nonpolar
  • cohesion
  • hydrogen bonding
  • capillary action
  • adhesion

Question 12

Question
A protein catalyst that speeds up the chemical reaction within an organism
Answer
  • homeostasis
  • protein
  • enzyme
  • metabolism

Question 13

Question
Drag and Drop the labels to their appropriate part.
Image:
Ks90e17 Yv47 (image/png)
Answer
  • Substrate
  • Product
  • Enzyme

Question 14

Question
A water molecule is made up of [blank_start]2[blank_end] hydrogen atoms and [blank_start]1[blank_end] oxygen atom.
Answer
  • 1
  • 2
  • 1
  • 2

Question 15

Question
Water’s ability to stick to itself is [blank_start]cohesion[blank_end],
Answer
  • cohesion

Question 16

Question
Water striders have the ability to walk on water because of [blank_start]surface tension[blank_end].
Answer
  • surface tension

Question 17

Question
Which property of water does NOT play a role in water's ability to climb the xylem of a plant?
Answer
  • cohesion
  • adhesion
  • surface tension
  • capillary action

Question 18

Question
Water can hang as a dew drop from the underside of a leaf due to [blank_start]adhesion[blank_end].
Answer
  • adhesion

Question 19

Question
Water is known as a universal solvent because
Answer
  • 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

Question 20

Question
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?
Answer
  • High heat of vaporization
  • High specific heat
  • Surface tension
  • Cohesion

Question 21

Question
What binds to the enzyme at the active site?
Answer
  • Product
  • Substrate
  • Inhibitor
  • Competitor

Question 22

Question
What environmental conditions can cause an enzyme to denature?
Answer
  • Salinity
  • pH
  • Temperaure
  • Substrate concentration

Question 23

Question
Most Enzyme names end in -ase.
Answer
  • True
  • False

Question 24

Question
Enzymes are not reusable after a chemical reaction.
Answer
  • True
  • False

Question 25

Question
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].
Answer
  • Noncompetitive
  • Competitive
  • Noncompetitive
  • Competitive

Question 26

Question
The optimal pH of Chymotrypsin is [blank_start]7.5[blank_end].
Image:
Life11e Fig 08 19 0 (image/jpeg)
Answer
  • 7.5
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