WorksheetsChemistry concepts - biology
Total questions: 48
Worksheet time: 1hrs 4mins
Name
Class
Date
1.
Proteins are made of monomers called ___________
a)
Nucleotides
b)
Monosaccharides
c)
Amino Acids
d)
Glycerol and fatty acids
2.
The element _______is found in all of the organic compounds.
a)
Iron
b)
Nitrogen
c)
Carbon
d)
Oxygen
3.
DNA and RNA are examples of
a)
Carbohydrates
b)
Lipids
c)
Proteins
d)
Nucleic Acids
4.
Waxes, oils and fats are examples of
a)
Carbohydrates
b)
Lipids
c)
Proteins
d)
Nucleic Acids
5.
What is the function of nucleic acids?
a)
store genetic information
b)
store energy (long-term)
c)
store energy (short-term)
d)
build skin, hair, nails, muscles
6.
Which macromolecule stores energy, insulates us, and makes up the cell membrane?
a)
lipids
b)
proteins
c)
carbohydrates
d)
nucleic acids
7.
Subunit (monomer) is to Macrocolecule like ___ is to ____
a)
Building is to Bricks.
b)
Brick is to Building.
c)
Carpenter is to Building.
d)
Building is to Carpenter.
8.
Examples include glucose and fructose.
a)
Lipids
b)
Carbohydrates
c)
Nucleic Acids
d)
Proteins
9.
What does POLY- mean?
a)
Two
b)
A name for a parrot
c)
Many
d)
One
10.
What are the four types of Macromolecules
a)
carbohydrates, proteins, lipids, amino acids
b)
carbohydrates, lipids, nucleic acids, proteins
c)
carbohydrates, monosaccharides, proteins, lipids
d)
carbohydrates, amino acids, lipids, proteins
11.
What are the monomers (building blocks) of NUCLEIC ACIDS?
a)
Monosaccharides (simple sugars)
b)
Amino Acids
c)
Nucleotides
d)
Triglycerides/No true monomer
12.
What are the monomers (building blocks) of CARBOHYDRATES?
a)
Monosaccharides (simple sugars)
b)
Amino Acids
c)
Nucleotides
d)
Triglycerides/No true monomer
13.
Which of the following is NOT a biological macromolecule?
a)
Water
b)
Lipid
c)
Carbohydrate
d)
Nucleic Acid
14.
Carbohydrates are made of...
a)
C H O
b)
C H O N
c)
C H O N P
d)
C H O N S
15.
Lipids are made of...
a)
C H O
b)
C H O N
c)
C H O N P
d)
C H O N S
16.
Which molecule is shown?
View Figure 1 (if not visible)
View Figure 1 (if not visible)
a)
lipid
b)
protein
c)
nucleic acid
d)
carbohydrate
17.
_________ are composed out of carbon (C), hydrogen (H), oxygen (O), nitrogen (N), and phosphorus (P)
a)
Carbohydrates
b)
Lipids
c)
Proteins
d)
Nucleic Acids
18.
All polymers are made up of...
a)
monosaccharides
b)
monomers
c)
proteins
d)
None of these
19.
Why is carbon so special compared to other elements?
a)
Carbon can bond to other carbon
b)
Only carbon can dissolve in water
c)
Carbon has 4 valence electrons and can bond with four other atoms
d)
Only carbon can bond with oxygen
20.
What shapes can carbon compounds form?
a)
squares, triangles, and circles
b)
chains, branched chains, and rings
c)
rings, squares, and chains
d)
chains, triangles, and circles
21.
Enzymes are considered to be
a)
Lipids
b)
Carbohydrate
c)
Protein
d)
Nucleic Acid
22.
What is the purpose of an enzyme?
a)
give permission for the reaction
b)
raise activation energy
c)
speed up reactions
d)
control how many reactions occur
23.
Where do substrates bind on an enzyme?
a)
voltage-gated channels
b)
surface receptor
c)
calcium channels
d)
active site
24.
Enzymes are capable of increasing the rate of a chemical reaction within a living cell. Enzymes accomplish this through which of the following means?
a)
reducing the number of products
b)
reducing the activation energy
c)
increasing the temperature of the cell
d)
increasing the concentration of reactants
25.
What is a substance called if it speeds up a chemical reaction?
a)
reusable
b)
catalyst
c)
specific
d)
fragile
26.
What 3 letters do enzymes typically end in?
a)
-ose
b)
-ase
c)
-ese
d)
-tic
27.
What is the name for the model of enzyme activity?
a)
Lock and key
b)
jigsaw puzzle
c)
hammer and nail
d)
two hands pattern
28.
Any substance that is acted upon by an enzyme is called a(n)?
a)
Coenzyme
b)
Substrate
c)
Vitamin
d)
Polypeptide
29.
The amount of energy required to begin a chemical reaction is called?
a)
Substrate Energy
b)
Start Energy
c)
Activation Energy
30.
Energy is absorbed in which chemical reaction?
a)
Endothermic
b)
Exothermic
31.
Energy is released in which chemical reaction?
a)
endothermic
b)
exothermic
32.
When the rate of the forward reaction is equal to the rate of the backward reaction it is called __________.
a)
Stagnate
b)
Finished
c)
Equilibrium
d)
Product
33.
The graph shows how enzymes affect reactions in cells. Which statement best summarizes the information shown in the graph?
a)
Enzymes increase the energy of the reactants.
b)
Enzymes decrease the energy level of the products.
c)
Enzyme decrease the activation energy of the reaction.
d)
Enzymes reverse the direction of the reaction.
34.
Enzymes can be recycled/reused.
a)
True
b)
False
35.
The elements or compounds that enter into the reaction are _______________ .
a)
reactants
b)
products
c)
catalysts
d)
bond energies
36.
The elements or compounds produced by the reaction are the _________________ .
a)
reactants
b)
products
c)
catalysts
d)
bond energies
37.
____________________ and ______________ can affect the activity of enzymes.
a)
weight and height
b)
rain and snow
c)
pH and temperature
d)
food and drink
38.
A molecule with electrically charged areas is called a _______________.
a)
magnet
b)
polar molecule
c)
solution
d)
electrical molecule
39.
Which end of the water molecule has a slightly positive charge?
a)
the oxygen end
b)
the hydrogen end
c)
both ends are slightly positive
d)
neither end is positive
40.
What two elements make up water?
a)
Helium and oxygen
b)
Hydrogen and oxygen
c)
helium and carbon
d)
oxygen and carbon
41.
Attraction between molecules that are the same:
a)
adhesion
b)
density
c)
cohesion
42.
Type of mixture in which all substances are evenly distributed is a?
a)
Solution
b)
Solute
c)
Solvent
43.
An attraction between molecules of different substances:
a)
cohesion
b)
adhesion
c)
surface tension
44.
Large bodies of water do not quickly change their temperature. Why?
a)
Water is a solvent.
b)
Water has a high heat capacity or specific heat.
c)
Water acts as a buffer.
d)
Water is non-polar.
45.
The attraction that causes water and other liquids to form drops is called ________________. This is also water’s ability to be attracted to other water molecules.
a)
adhesion
b)
capillary action
c)
cohesion
d)
surface tension
46.
Bonds between water molecules where positive hydrogen is attracted to negative oxygen are called _______________ bonds.
a)
ionic
b)
covalent
c)
oxygen
d)
hydrogen
47.
Like dissolves like, so polar dissolves ________.
a)
polar
b)
nonpolar
c)
North polar
d)
South polar
48.
The liquid in a solution is called the ________.
a)
solute
b)
solvent
c)
solid
d)
mixture
100 %
