Quiz about Macromolecules ,pH, Properties of Water - Biology

Question 1

Proteins are made of monomers called ___________

Accepted Answer

Amino Acids

Answer

Nucleotides

Answer

Monosaccharides

Answer

Glycerol and fatty acids

Question 2

Which macromolecule is shown?

Accepted Answer

carbohydrate

Answer

lipid

Answer

protein

Answer

nucleic acid

Question 3

Carbohydrates are made of...

Accepted Answer

C H O

Answer

C H O N

Answer

C H O N P

Answer

C H O N S

Question 4

Lipids are made primarily of...

Accepted Answer

C H O

Answer

C H O N

Answer

C H O N P

Answer

C H O N S

Question 5

Each amino acid in a protein is made of...

Accepted Answer

C H O N

Answer

C H O

Answer

C H O N P

Answer

C H O N S

Question 6

This is one job proteins do NOT have in the body

Accepted Answer

insulation

Answer

structure for tissues and organs

Answer

speed up chemical reactions

Answer

transport things through cell membrane

Question 7

Which macromolecule stores energy, insulates us, and makes up the cell membrane?

Accepted Answer

lipids

Answer

proteins

Answer

carbohydrates

Answer

nucleic acids

Question 8

What type of macromolecule is being represented in this image?

Accepted Answer

protein

Answer

carbohydrate

Answer

lipid

Answer

nucleic acid

Question 9

This molecule is classified as___________________.

Accepted Answer

polysaccharide

Answer

Triglyceride

Answer

protein

Answer

monosaccharide

Question 10

The diagram illustrates a biochemical process that occurs in organisms.

What is another name for the substance labeled "catalyst"?

Accepted Answer

enzyme

Answer

hormone

Answer

antibody

Answer

inorganic compound

Question 11

The effect of temperature on the relative rate of action of an enzyme is represented in the graph.

The optimum temperature for the action of this enzyme is approximately

Accepted Answer

37 C

Answer

50 C

Answer

22 C

Answer

15 C

Question 12

What does letter "C" represent in the diagram?

Accepted Answer

Active Site

Answer

Enzyme

Answer

Substrate

Answer

Products

Question 13

What does letter "B" represent in the diagram?

Accepted Answer

substrate

Answer

enzyme

Answer

active site

Answer

enzyme/substrate complex

Question 14

Enzymes are capable of increasing the rate of a chemical reaction within a living cell. Enzymes accomplish this through which of the following means?

Accepted Answer

reducing the activation energy

Answer

reducing the number of products

Answer

increasing the temperature of the cell

Answer

increasing the concentration of reactants

Question 15

Many aquatic birds secrete waxy organic substances that repel water. The birds use these substances to coat their feathers. An analysis of these substances would reveal that they are composed mostly of

Accepted Answer

lipids.

Answer

nucleic acids.

Answer

proteins.

Answer

carbohydrates.

Question 16

Macromolecules are formed by a process called polymerization, in which large compounds are built by joining smaller ones together.

The smaller units, or _____, join together to form _____.

Accepted Answer

monomers, polymers

Answer

polymers, monomers

Answer

molecules, atoms

Answer

cells, molecules

Question 17

Four groups of organic compounds found in living things are

Accepted Answer

carbohydrates, lipids, nucleic acids, and proteins

Answer

water, vitamins, minerals, air

Answer

carbon, hydrogen, oxygen, and nitrogen

Answer

sunlight, chlorophyll, photosynthesis, and glucose

Question 18

Which macromolecule do living things use as their main source of energy?

Accepted Answer

carbohydrates

Answer

lipids

Answer

nucleic acids

Answer

proteins

Question 19

Single sugar molecules are called _____.

Accepted Answer

monosaccharides

Answer

disaccharides

Answer

triglycerides

Answer

polysaccharides

Question 20

Large macromolecules formed from monosaccharides are called _____.

Accepted Answer

polysaccharides

Answer

disaccharides

Answer

triglycerides

Answer

glucose

Question 21

Plants store excess sugar as starch. Many animals store excess sugar in a polysaccharide called _____.

Accepted Answer

glycogen

Answer

glucose

Answer

protein

Answer

amino acid

Question 22

Which macromolecule is used to store energy and makes up a large portion of cell membranes?

Accepted Answer

lipids

Answer

carbohydrates

Answer

nucleic acids

Answer

proteins

Question 23

A lipid molecule is composed of

Accepted Answer

a glycerol molecule and 3 fatty acid chains

Answer

monosaccharides and disaccharides

Answer

nucleotides (phosphate, sugar, nitrogenous base)

Answer

amino acids

Question 24

Which macromolecule is used to store and transmit hereditary/genetic information?

Accepted Answer

nucleic acids

Answer

carbohydrates

Answer

lipids

Answer

proteins

Question 25

Nucleic acids are composed of monomers called _____.

Accepted Answer

nucleotides

Answer

starch

Answer

glycerol

Answer

DNA

Question 26

Proteins are composed of monomers called _____.

Accepted Answer

amino acids

Answer

monosaccharides

Answer

glycerol molecule

Answer

nucleotides

Question 27

What is the pH range for acidic solutions?

Accepted Answer

0 to 6

Answer

1 to 5

Answer

7 to 14

Answer

2 to 8

Question 28

What is buffering capacity in water and why is it important?

Accepted Answer

Ability to resist changes in pH; important for maintaining stable pH levels

Answer

Ability to increase changes in pH; important for maintaining unstable pH levels

Answer

Ability to resist changes in temperature; important for maintaining stable temperature levels

Answer

Inability to resist changes in pH; important for maintaining stable pH levels

Question 29

Discuss the impact of pH on biological processes.

Accepted Answer

pH can affect the structure and function of enzymes, proteins, and other biomolecules, impacting biological processes such as metabolism, cell signaling, and gene expression.

Answer

Biological processes are not influenced by pH

Answer

pH has no impact on biological processes

Answer

pH only affects non-essential biological functions

Question 30

If a substance has a pH less than 7, it is

Accepted Answer

acidic

Answer

neutral

Answer

basic

Answer

water

Question 31

If a substance has a pH more than 7, it is

Accepted Answer

basic

Answer

neutral

Answer

acidic

Answer

water

Question 32

When water is attracted to other water molecules, this is known as

Accepted Answer

cohesion

Answer

covalent bonding

Answer

electron sharing

Answer

adhesion

Question 33

When water is attracted to non-polar molecules, this is known as

Accepted Answer

adhesion

Answer

covalent bonding

Answer

electron sharing

Answer

cohesion

Question 34

What is an enzyme?

Accepted Answer

A protein that speeds up chemical reactions

Answer

A protein that breaks apart molecules

Answer

A protein needed for cell structure

Answer

A neurological protein involved in cell signaling

Question 35

What is activation energy

Accepted Answer

The energy required to activate an enzyme

Answer

The energy released after chemical reactions

Answer

Energy absorbed by chemical reactions

Question 36

An enzyme speeds up a reaction by

Accepted Answer

lowering the activation energy.

Answer

raising the activation energy.

Answer

releasing energy.

Answer

absorbing energy.

Question 37

In a chemical reaction, a reactant binds to an enzyme at a region known as the

Accepted Answer

active site.

Answer

catalyst.

Answer

product.

Answer

substrate.

Question 38

Which of the factors does NOT affect enzymatic activity?

Accepted Answer

Color

Answer

Temperature

Answer

pH

Answer

Concentration

Question 39

An enzyme is a catalyst.

Accepted Answer

True

Answer

False

Question 40

What is a substance called if it speeds up a chemical reaction?

Accepted Answer

catalyst

Answer

reusable

Answer

specific

Answer

fragile

Question 41

With what 3 letters do enzymes typically end?

Accepted Answer

-ase

Answer

-ose

Answer

-ese

Answer

-tic

Question 42

Where do substrates bind on an enzyme?

Accepted Answer

active site

Answer

voltage-gated channels

Answer

surface receptor

Answer

calcium channels

Question 43

The graph shows how enzymes affect reactions in cells. Which statement best summarizes the information shown in the graph?

Accepted Answer

Enzyme decrease the activation energy of the reaction.

Answer

Enzymes increase the energy of the reactants.

Answer

Enzymes decrease the energy level of the products.

Answer

Enzymes reverse the direction of the reaction.

Question 44

Which of these is most likely an enzyme?

Accepted Answer

Amylase

Answer

Sucrose

Answer

Galactose

Answer

Fructose

Question 45

Based on the graph, what is the optimal temperature for this enzyme?

Accepted Answer

30oC

Answer

15oC

Answer

40oC

Answer

35oC

Question 46

What happens when enzymes are heated to a high temperature?

Accepted Answer

The shapes of the enzyme are altered or denatured

Answer

The enzymes die.

Answer

The enzymes' amino acid sequence changes.

Answer

The enzymes remain the same

Question 47

The pH scale is a range from:

Accepted Answer

0-14

Answer

1-7

Answer

1-5

Answer

1-20

Question 48

A(n) ______ is a substance with a pH less than 7

Accepted Answer

Acid

Answer

Alkaline

Answer

Base

Answer

Buffer

Question 49

Bleach is a strong base, what is the pH level of bleach?

Accepted Answer

13

Answer

14

Answer

1

Answer

2

Question 50

What word describes when water is attracted to other substances?

Accepted Answer

adhesion

Answer

cohesion

Answer

capillary action

Answer

surface tension

Question 51

What two elements make up water?

Accepted Answer

Hydrogen and oxygen

Answer

Helium and oxygen

Answer

helium and carbon

Answer

oxygen and carbon

Question 52

Attractions between the negative Oxygen atom of one water molecule and the positive Hydrogen atom of another water molecule are called

Accepted Answer

Hydrogen bonds

Answer

Covalent bonds

Answer

Ionic bonds

Answer

Polar bonds

Question 53

Why does ice float?

Accepted Answer

As water freezes, it expands and its density decreases.

Answer

As water freezes, it takes up more hydrogen from the atmosphere, causing it to have a greater buoyancy.

Answer

As water freezes, air becomes trapped between the hydrogen bonds of water molecules.

Answer

As water freezes, it takes up more oxygen from the atmosphere, causing it to have a greater buoyancy.

Question 54

Water is a universal solvent because it...

Accepted Answer

Dissolves most substances

Answer

It can be found anywhere

Answer

It freezes when it gets cold

Answer

floats when frozen

Question 55

Which of the following is LEAST likely to dissolve in water?

Accepted Answer

nonpolar fats and oils

Answer

polar sugar molecules

Answer

salt made of a positive sodium ion and a negative chloride ion

Answer

all of the substances will dissolve easily in water

Question 56

Large bodies of water, such as lakes and oceans, do not quickly fluctuate in temperature. What is the reason for this phenomenon?

Accepted Answer

Water has a high heat capacity.

Answer

Water is an acid.

Answer

Water is a versatile solvent.

Answer

Water acts as a buffer.

Question 57

Small insects can walk across the surface of calm water. Their feet push the surface of the water down slightly, somewhat like a person walking across a trampoline, but they do not break the surface. What is the best explanation for why this happens?

Accepted Answer

The insects are light enough so that they do not break the hydrogen bonds holding the water molecules together

Answer

The insects actually use their wings to hover slightly above the water's surface and they only skim it with their feet

Answer

The insects' feet are non-polar, so they are repelled by the polar water molecules and are pushed away from the water's surface

Answer

The insects are small enough to see the individual water molecules, so they are able to step carefully from one molecule to the next

Question 58

The tightness across the surface of water that enables paper clips to float is ____________.

Accepted Answer

surface tension

Answer

adhesion

Answer

capillary action

Answer

polarity

Question 59

Which statement explains why water molecules stick together?

Accepted Answer

one side has a positive charge and the other side has a negative charge

Answer

both sides are negative

Answer

one side has a negative charge adn the other side has a neutral charge

Answer

both sides are positive

Question 60

When a molecule has an opposite electrical charge on each end, it is known as what?

Accepted Answer

polar molecule

Answer

cohesion

Answer

hydrogen bond

Answer

solution

Question 61

Tomato juice has a pH of 4. Determine if it's an acid, base, or neutral.

Accepted Answer

acid

Answer

base

Answer

neutral

Question 62

The amount of energy required to raise the temperature of 1 gram of a substance by 1 degree Celsius is called...

Accepted Answer

specific heat

Answer

polar molecule

Answer

capillary action

Answer

surface tension

Question 63

Glucose is an example of a

Accepted Answer

Carbohydrate

Answer

Lipid

Answer

Protein

Answer

Nucleic Acid

Question 64

The word saccharide means:

Accepted Answer

sugar

Answer

glucose

Answer

sweetener

Answer

carbohydrate

Macromolecules ,pH, Properties of Water - Biology

Create a free account and access millions of resources

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Science