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Chemistry of Life

Total questions: 41

Worksheet time: 25mins

Name
Class
Date
1.
What particle is found in the nucleus and has no charge?
a)
electron
b)
neutron
c)
proton
d)
atom
2.
A negatively charged particle moving around the nucleus of an atom
a)
neutron
b)
proton
c)
electron 
d)
ion
3.

What makes a chemical reaction?

a)

matter is conserved

b)

breaking and forming of chemical bonds

c)

when products form reactants

d)

when you do a lab

4.
The 4 macromolecules are
a)
vitamins, lipids, water, micronutrients
b)
micronutrients, macronutrients, water, vitamins
c)
Lipids, Waxes, Vitamin A, Water
d)
Carbohydrates, Lipids, Proteins, Nucleic Acids
5.
Which is NOT a unique property of water?
a)
Frozen water floats on liquid water.
b)
Water covers most of the Earth’s surface and retains a large amount of heat.
c)
Water molecules stick to each other through hydrogen bonds.
d)
Water cools very rapidly.
6.
The attraction that causes water and other liquids to form drops on thin films is called ________________. This is also water’s ability to be attraction to other water molecules.
a)
adhesion
b)
capillary action
c)
cohesion
d)
surface tension
7.
What property of water helps to moderate earth's temperature?
a)
adhesion
b)
chohesion
c)
Specific heat capacity
d)
Latent heat of vaporization
8.
Which biomolecule is made of nucleotides and contain you DNA?
a)
Carbohydrate
b)
Lipids
c)
Protein
d)
Nucleic Acid
9.
Which biomolecule has sugars and starches?
a)
Lipids
b)
Proteins
c)
Carbohydrates
d)
Nucleic Acid
10.
Which biomolecule functions include enzymes­ which speeds the rate of chemical reactions, structural components in cells, mechanical functions in muscles and cytoskeleton, cell signaling, and immune response; provides structure and helps with chemical reactions 
a)
Protein
b)
Lipids
c)
Carbohydrate
d)
Nucleic Acid
11.
Which biomolecule is important source of energy for humans; glucose for human cells, tissues, and organs; provides fiber, sugar, and starches; provides structural support, cell wall, and cell membrane maker?
a)
Nucleic Acid
b)
Lipid
c)
Carbohydrate
d)
Protein
12.
Which biomolecule includes fats, such as triglycerides, oils, waxes, and steroids (cholesterol); insoluble in water; provides energy storage, insulation, part of cell membrane, and hormones 
a)
Nucleic Acid
b)
Lipids
c)
Carbohydrate
d)
Protein
13.
What is the monomer for a protein?
a)
Monosaccharide
b)
Triglyceride
c)
Amino Acid
d)
Nucleotide
14.
Lipids are made up of which of the following?
a)
glycerol and fatty acids tails
b)
glycerol and monolipids
c)
fatty acids and phosolipids
d)
amino acids and nucleotides
15.
The waxy, organic substances used by aquatic birds to coat their feathers, when analyzed consists mostly of 
a)
lipids
b)
proteins
c)
carbohydrates
d)
nucleic acids
16.

A water strider can skate along the top of a pond because:

a)

Low surface tension of water

b)

Hydrogen bonds result in water cohesion (surface tension)

c)

Covalent bonds result in water cohesion

d)

Water striders have adapted to take advantage of water cohesion

17.

Water is often called the “universal solvent” because many substances can be dissolved in water. What property of water allows it to be such a universal solvent?

a)

Purity

b)

Polarity and cohesion

c)

High heat capacity

d)

Expansion upon freezing

18.

Any compound that removes H+ ions to an aqueous solution and measures more than 7 on the pH scale:

a)

Base

b)

Solvent

c)

Acid

d)

Solute

19.

Why does ice float?

a)

As water freezes, it expands and its density decreases.

b)

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

c)

As water freezes, it takes up more hydrogen from the atmosphere, causing it to have greater buoyancy (floating ability). 

d)

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

20.

Substance in a solution that dissolves the other substance and is present in the greater amount:

a)

Solute

b)

Acid

c)

Solution

d)

Solvent

21.

Water is polar because:

a)

The molecule has two poles, at which it is colder than the other regions of the molecule.

b)

The water molecule is neutral

c)

The unequal sharing of electrons gives the water molecule a slight negative charge near its oxygen atom and a slight positive charge near its hydrogen atoms. 

d)

The unequal sharing of electrons gives the water molecule a slight negative charge near its hydrogen atoms and a slight positive charge near its oxygen atom.

22.

Any compound that donates H+ ions to an aqueous solution and measures less than 7 on the pH scale:

a)

Acid

b)

Base

c)

Solvent

d)

Solute

23.

Which of the following is a function of a carbohydrate?

a)

Provides long term energy to body

b)

Supports the body in building structures necessary for survival

c)

Provides short term energy to the body

d)

Gives the body instructions for how to build our body's structures

24.

How can you tell the difference in the structure of carbohydrates and lipids?

a)

Both have Carbon, Hydrogen, and Oxygen. Carbohydrates have ring structures and Lipids have line structures

b)

Both have Carbon, Hydrogen, and Oxygen. Lipids have ring structures and Carbohydrates have line structures

c)

Carbohydrates have more carbon than Lipids

d)

Both have Carbon, Hydrogen, and Oxygen. Lipids additionally have Nitrogen

25.

A scientist is analyzing different biomolecule structures. They notice an influx of Phosphorus. Which biomolecule are they looking at?

a)

Lipids

b)

Protein

c)

Carbohydrate

d)

Nucleic Acid

26.

Some proteins catalyze biochemical reactions. If a genetic defect prevented a protein catalyst from being produced, which of the following do you predict would happen in the cell?

a)

The cell would find a different type of protein to catalyze the reaction.

b)

The reaction the protein catalyzes would proceed very slowly or not at all.

c)

The reaction the protein catalyzes would only occur in some places in the cell.

d)

The reverse reaction of the one the protein catalyzes would begin to proceed.

27.

Carbohydrates, Lipids, Proteins, and Nucleic Acids are the biomolecules/macromolecules that make you up.

a)

True

b)

False

28.

Simple sugars, or monosaccharides, such as glucose are the building blocks of

a)

Lipids

b)

Carboydrates

c)

Protein

d)

Nucleic Acids

29.

Monomers are

a)

Building blocks

b)

Houses

c)

Compounds

d)

Elements

30.

Which of the following is not considered a major element of life?

a)

Carbon

b)

Oxygen

c)

Nitrogen

d)

Calcium

e)

Hydrogen

31.

Amino Acids are monomers for

a)

Carbohydrates

b)

Lipids

c)

Protein

d)

Nucleic Acids

32.

Are lipids nonpolar? (hydrophobic)

a)

True

b)

False

33.

The function of Nucleic Acids is

a)

Store Energy

b)

Use energy

c)

to store and transmit genetic

info

d)

to transport oxygen throughout the body

34.

Atoms share pairs of Electrons in what kind of bond

a)

Covalent

b)

Ionic

c)

Electrical

d)

Cohesive

35.

A catalyzed reaction

a)

increases the products made

b)

uses less activation energy to get started

c)

has a slower reaction rate

d)

uses more reactants throughout the reaction

36.

Enzymes act on

a)

products

b)

proteins

c)

amino acids

d)

substrates

37.

Activation energy

a)

is the term for the amount of energy in each reactant

b)

helps the enzyme to increase the rate of the reaction

c)

is the term for the amount of energy that needs to be added for a chemical reaction to start

d)

is the term for the amount of energy released by the reaction after it starts

38.

What are the products in this chemical reaction?

a)

calcium and oxygen

b)

Ca and CaO

c)

2Ca and O2

d)

2CaO

39.

What is happening in this picture?

a)

an enzyme is binding a substrate together to form a product

b)

an enzyme is breaking down a substrate to release new products

c)

the active site of the enzyme does not fit the substrate

d)

a change in pH has damaged the enzyme

40.

The building blocks of most living things contain the element

a)

carbon

b)

nitrogen

c)

calcium

d)

sodium

41.

Changes in the pH, temperature, enzyme concentration, and/or substrate concentration can negatively affect

a)

the activation energy of chemical reactions

b)

the bond energy released by reactants in a reaction

c)

the efficient function of an enzyme or catalyzed reaction

d)

the polarity of water used for evaporative cooling

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