WorksheetsBio exam
Total questions: 109
Worksheet time: 3hrs 44mins
A biologist is studying how pollution affects algal growth and snail populations in a portion of Lake Erie. What level of organization is she studying?
biosphere
population
community
ecosystem
Why is evolution an important process for living things?
It gives them traits that better match their environment
It gives them more traits
It gives them only the right traits
It gives them fewer traits
It gives them the perfect traits
Domain _____ includes both unicellular and multicellular organisms.
Protista
Plantae
Fungi
Eukarya
Bacteria
What is the genus of the study animal?
amphibian
Bufo
cane toad
marinus
List in order the producer, decomposer, and comsumer in the system.
water fleas, bacteria, aquatic plants
bacteria, water fleas. aquatic plants
aquatic plants, bacteria, water fleas
aquatic plants, water fleas, bacteria
The purpose of a control group in an experiment is
for comparison to the results of other experiments
to prove the hypothesis
to control the dependent variable
for comparison to the other test groups
True or False : The mountain zebra (Equus zebra) and the donkey (Equus asinus) belong to the same species.
True because they have the same genus
False because the species epithet is different
True because they both start with Equus
False because they have no similarities to each other
The various species of honeycreepers have an assortment of different bills, but all species have a similar size and body shape. This is an example of
homeostatis
adaptations
descent with modification
DNA
Prokaryotes belong to _____.
Kingdom Plantae
Domain Archaea
Kingdom Protista
Domain Eukarya
Which of the following lists the terms from simplest to most complex?
tissues, organs, organ systems, organism, cells
cells, organs, tissues, organ systems, organism
organs, organ systems, organism, cells, tissues
cells, tissues, organs, organ systems, organism
Bioethics is a branch of biology concerned with
determining if experimental results are valif
studying the effects of human actions on extinction rates
the development and consequences of biological technology
studying the ethics of stem cell research
Which of the following terms is not correctly matched with a correct example?
a herd of wildebeests: population
a tropical rainforest: community
a spider: organism
a mosquito feeding on a human host: community
In science, a theory
cannot be tested
is more narrow in scope than a hypotheses
is tested by an experiment
encompasses many hypotheses
Which of the following is NOT TRUE with regards to extinction?
Extinction of different species can impact humans
As many as 400 species per day may be lost due to human activities
All extinctions are caused by human activities such as habitat destruction
Extinction is the death of a species or a larger taxonomic group
Salmon have an internal control system called osmoregulation that restores the balance of salt in their bodies by thenegative feedback. This is an example of which characteristics of life?
maintaining homeostasis
energy transformation
adaptation
response to the environment
The process of ____ leads to organisms that are ____ that environment.
homeostasis: suited to
natural selection: adapted to
adaptation: only found in
natural selection: perfect for
Based on the evolutionary tree of the three domains, which of the following is true?
All three domains are equally related to one another
Domain Bacteria and Domain Eukarya are more closely related to each other than to Domain Archaea
All three domains have a common ancestor
The Eukarya have remained the same throughout evolutionary time
Didinium are carnivorous protista, that prey on other, slower moving protista. A student is studying Didinium feeding rates after 1, 3, and 5 days of food deprivation. How should she classify the organism she is studying?
prokaryotic producer
eukaryotic decomposer
prokaryotic consumer
eukaryotic consumer
Many insects do not see into the red color-range and as a result, many insect-pollinated flowers are colors other than red. This flower coloration would be considered a(n)
gene
evolution
natural selection
adaptation
All of the following are true with respect to DNA except
offspring from sexual reproduction obtain their DNA from both parents
genes are made up of DNA
asexual reproduction results in offspring with DNA that is different from the parents
DNA codes for proteins
Which of the following is the most encompassing level of organization?
species
ecosystem
community
population
Linda observes the behaviors of 25 porcupines, records the location of 151 pinion pines, and traps 332 beetles. Her study encompasses ___ populations and ___ organisms.
508; 508
3; 508
3; 3
508; 3
The beaks of birds are well suited to the type of food they eat. This results arises from
adaptations only allowing those organisms who are well suited to a food source to feed on it
birds eating only what their beaks are well suited to eat
natural selection causing adaptations to develop in the birds to match their beaks
adaptations that occur as part of natural selection leading to a closer and closer fit between organisms and their environment
Which of the following is NOT TRUE about biodiversity?
The biodiversity that we have on Earth is the result of billions of years of evolution
Biodiversity is one of the most significant bioethical issues that we face today
Biodiversity is defined as variation in life on Earth
As extinction rates increase, biodiversity increases
Which of the following correctly lists the classification categories from least to most inclusive?
kingdom, phylum, domain, class, order, family, genus, species
species, genus, family, order, class, phylum, kingdom, domain
genus, species, family, class, order, domain, phylum, kingdom
domain, kingdom, phylum, class, order, family, species, genus
The process of ____ transforms solar enregy in chemical energy
photosynthesis
reproduction
metabolism
homeostasis
The constant use of pesticides by Richard has led to genetic changes in the insect's population over many generations This an example of
a gene
evolution
an adaptation
natural selection
Living organisms must constantly take in energy in order to power functions necessary to remain alive. The chemical reaction that involves energy conversation are called
metabolism
homeostasis
cell respiration
photosynthesis
Phylum Arthopoda is broken into subgroups which include both Arachnida (spiders) and Insecta (insects). As a result, Arachnida and Isecta most likely belong to which classification catergory?
Domain
Family
Kingdom
Class
The circulatory system of a whale is considered an organ system because it is composed of different
cells
molecules
organs
tissues
Scientists were studying temperature selection amongst pregnant big brown bats. What would be the best control group for this study?
male bats
pregnant bats
juvenile female bats
juvenile male bats
Isotopes of an atom differ in their
atomic number
atomic mass
number of electrons
number of protons
Glucose, C6H12O6, is best described as a(n)
element
isotope
compound
atom
All atoms of the same element have the same
number of neutrons
atomic number
number of electrons
atomic mass
Which of the following would be an example of the value of water's heat capacity?
Water is able to travel up a 100-foot tree
Water expands as it freezes causing ice to float on the surface of a lake
Living organisms are able to maintain their internal body temperatures because the water in their cells resists changes in temperature
Water molecules stick together
Which property of water causes sugar to dissolve in coffee?
Water has high heat capacity
Water is a good solvent
Water is cohesive
Water is able to change from a gas to a solid
In the reaction 6CO2 + 6H2O → C6H12O6 + 6O2 carbon dioxide is one of the
reactants
products
elements
ions
The subatomic particles that are found in the nucleus of an atom are the
electrons only
protons only
electrons and neutrons
neutrons and protons
The atomic structure of water satisfies the octet rule by having
electrons from hydrogen transferred to the oxygen atom
electrons from oxygen transferred to the hydrogen atoms
oxygen share electrons with two hydrogen atoms
electrons shared between the two hydrogen atoms
An element has an atomic number of 88. The number of protons and electrons in a neutral atom of the element are
44 protons and 44 electrons
0 protons and 88 electrons
88 protons and 88 electrons
88 protons and 44 electrons
The type of bond that would form from the transfer of an electron from one atom to another is a(n) ________ bond
covalent
ionic
hydrogen
atomic
An ionic bond forms when
an atom gives away or takes in an electron
an atom gives away or takes in a proton
a negatively charged ion is attracted to one with a positive charge
two atoms come close enough to share one or more electrons
Some insects can stride on the surface of water because water
has a high specific heat
is a good solvent
has surface tension
resists temperature changes
A(n) ________ can be defined as a substance that keeps pH within established limits by taking up excess H+ or OH- in a solution.
solute
buffer
acid
base
Which of the following would be considered a trace element in living things?
oxygen
hydrogen
carbon
zinc
Cola has a pH of 3.5. This means that it has an excess of _______ ions and would be called a(n) ________.
H+; acid
OH-; acid
H+; base
OH-; base
After drinking a great deal of coffee (pH 5), a human's blood buffering system would need to ________ as the coffee was digested to lower the level of acid present in the blood stream.
release OH-
take up H+
release H+
take up OH-
Which of the following statements about atoms is correct?
The nucleus of an atom contains protons and electrons
The number and arrangement of electrons in an atom governs its chemical activity.
The positive charges of an element are carried by the electrons
The neutral charges of an element are carried by the protons
Chemical bonds involve
the giving and taking of electrons
the giving and taking of protons
the giving, taking, or sharing of electrons
the giving, taking, or sharing of protons
A covalent bond occurs when
protons are transferred from one atom to another
neutrons are shared between two atoms to form an isotope
electrons are shared between two atoms to complete their octets
electrons are transferred from one atom to another
Of the following examples, which best demonstrates the property of water cohesion?
Water can move up a 100-foot pine tree, from the roots to the leaves
A rock skipping across the surface of a lake
Water requires a great deal of heat to reach the point of vaporizing
A can of soda bursts when it is placed in the freezer
Isotopes of an element differ in their
proton number
electron number
neutron number
atomic number
A water molecule is polar because of
the transfer of electrons
unequal sharing of electrons
its ability to freeze
its hydrogen bonds
What do lemons, tomatoes, and coffee all have in common chemically?
They all produce OH- ions in solution, making them bases
They all produce H+ ions in solution, making them acids
They are all neutral in pH
They are all slippery to the touch
An atom's valence electron shell
determines its chemical reactivity
determines its atomic mass
is filled with positively charged particles
is filled when it has three electrons
Sulfur has an atomic number of 16. How many valence shell electrons does it have?
two
three
five
six
Sulfur has an atomic number of 16. How many valence shell electrons does it have?
adding the number of electrons and protons together
subtracting the number of electrons from the number of protons
adding the mass number to the number of electrons
subtracting the number of protons from the mass number
Which one of the following is the smallest unit of matter that has all the properties of an element?
proton
atom
compound
electron
Which of the following is a molecule and NOT a compound?
H2O
O-2
NaCl
CO2
Which of the following best describes the structure of how water molecules form?
Hydrogen atoms covalently bond with each other to create one stable valence shell of electrons. The hydrogen molecule then forms a hydrogen bond with an oxygen atom to create the water molecule.
One oxygen atom transfers an electron to each of two hydrogen atoms, forming an ionic bond.
The oxygen atom and hydrogen atoms form a covalent bond with one another to create stable valence shells of electrons. The electrons are shared unequally resulting in a polar molecule.
Hydrogen bonds are formed between the two hydrogen atoms and the oxygen atom.
In what ways are radioactive isotopes potentially harmful?
They are used to trace molecular changes
Unmonitored release into the environment can make changes in a cell's DNA
They are used to determine the age of biological specimens
They are used to trace the path of materials throughout the body
Which of these does not occur when a sodium atom transfers an electron to a chlorine atom?
The sodium atom becomes a positively charged ion
The ions will separate in the presence of water
There is a sharing of the electrons between the sodium and chlorine atoms
The chlorine atom becomes a negatively charge ion
When water boils
hydrogen bonds are broken between neighboring water molecules
covalent bonds are broken between oxygen and hydrogen atoms
ionic bonds are broken when the minerals in water are heated
the hydrogen atoms break away from the oxygen and escape as vapor
An atom that has an electrical charge is called a(n)
ion
isotope
element
molecule
The pH scale is a mathematical indicator of the
concentration of OH- present in a solution
ability of a solution to buffer
ability to dissolve in water
concentration of H+ present in a solution
The four main categories of organic macromolecules are
monosaccharides, disaccharides, trisaccharides, and polysaccharides
carbohydrates, lipids, proteins, and nucleic acids
RNA, DNA, steroids, and fats
lipids, starches, DNA, and protein
Glycogen is a ________ made of many ________.
simple sugar; amino acids
peptide; amino acids
polymer; glucose molecules
protein; fatty acids
A saturated fat has
no double bonds
more than one double bond
many omega-3 fatty acids
long protein chains
Which of the following correctly lists the parts of a nucleotide of RNA?
nitrogen-containing base, deoxyribose, phosphate
sulfur-containing base, ribose, phosphate
nitrogen-containing base, ribose, phosphate
amino acid, glycerol, nitrogen-containing base
Which of the following is a feature that proteins and polysaccharides share?
They are both made from fatty acids
They are made of repeated monomer units
They both contain glucose
They both contain phosphorus
The term "functional" is used in the phrase "functional group" because it describes a group of atoms that
make the entire molecule hydrophobic
prevent interaction with other molecules
help determine the chemical properties of an organic molecule
make the entire molecule hydrophilic
What is the function of a peptide bond?
joins an amino acid to an adjacent amino acid
links oxygen to hydrogen atoms
joins nucleotide bases to one another
helps hold one water molecule to an adjacent one
A gene in DNA is the code for assembling a sequence of
fatty acids used in a fat
sugars
functional groups
amino acids
Which of the following is an inorganic molecule?
C6H12O6
CaCO3
CH4
C18H34O2
Steroid are classified as
proteins
fats
lipids
carbohydrates
If a material mixes readily with water, it is identified as
dehydrated
hydrophobic
saturated
hydrophilic
Which formula is a Hydrocarbon?
H2O
NaCl
CH4
CO3
Scientists created an enzyme that will break down any type of carbohydrate. If given to humans, which of the following could be used as a new food source?
glucose
cellulose
glycerol
cholesterol
Which of the following terms should be categorized separately from the others?
antibodies
muscle
enzymes
sucrose
Wood and paper are composed of
chitin
cellulose
glycogen
lipid
Hydrolysis of sucrose, a disaccharide, results in
two monosaccharides
a polypeptide
two glycerol units
three monosaccharides
Select the correct association
lipids—contain the codes used to construct proteins
proteins—have three forms: monosaccharides, disaccharides, and polysaccharides
nucleic acids—provide the body with energy
carbohydrates—include glucose, sucrose, and starch
Which of the following would describe a polypeptide?
fatty acids joined to glycerol by hydrolysis reactions
glucose molecules joined by dehydration synthesis reactions
amino acids joined by dehydration synthesis reactions
nucleotides broken by hydrolysis reactions
Which nitrogen-containing base is found in DNA but not in RNA?
guanine
thymine
cytosine
adenine
In sickle cell disease, malformation of red blood cells is caused by only one mistake for one amino acid in the genetic code for hemoglobin.
True
False
Plants store their sugar in the form of
protein
glucose
cellulose
starch
The principle role for sugars in living things is to
form cell membranes
serve as a form of long-term energy storage
serve as a form of immediate cellular energy
create our genetic code
The primary structure of a protein refers to the
alpha helix or pleated sheets
interactions among two or more polypeptides
side groups of the amino acids
number and sequence of amino acids
When you eat a salad, which one of the following components will pass through the body with the least amount of digestion?
dressing
croutons
lettuce
egg
Which word should be categorized separately from the others?
fats
glycogen
steroids
lipids
Amino acids are needed to build ________, just as ________ are needed to create DNA.
proteins; nucleotides
fatty acids; amino acids
polysaccharides; monosaccharides
triglycerides; nucleotides
A nucleotide is made of which of the following chemical components?
a nitrogen-containing base, an amino acid, and a five-carbon sugar
a nitrogen-containing base, an amino acid, and a phosphate group
a nitrogen-containing base, a phosphate group, and a sugar
a nitrogen-containing base, a fatty acid, and an amino acid
When a person orders a cheeseburger with lettuce, tomato, and mayonnaise, which of the following would be a true statement about the nutritional intake?
Amino acids can be obtained from the hamburger patty
Fat will be consumed from the lettuce and tomato
Glycogen will be obtained from the cheese
Carbohydrates and cellulose will be obtained from the hamburger patty
A fatty acid that has double bonds is called
steroid
organic
unsaturated
cholesterol
The basic building block or subunit of many biological molecules is called a(n)
quaternary structure
polymer
isomer
monomer
Which of the following is in correct order from smallest to largest?
peptide - amino acid - polypeptide
amino acid - polypeptide - peptide
amino acid - peptide - polypeptide
protein - glycerol - amino acid
Which of the following is a hydrolysis reaction?
amino acids forming proteins
glycogen forming glucose molecules
nucleotides forming DNA
glucose units forming starch
What makes saturated triglycerides considerably less healthy than unsaturated ones?
They taste better than other fats
Unsaturated fats are found in processed foods more frequently
They are digested more quickly by the body
They possess no double bonds between carbon atoms, which makes them more tightly packed together
Which of the following elements are found in glucose?
C, H
C, H, O
C, H, O, P
C, H, O, N
The shape of a protein is critical to its function?
True
False
Deoxyribose is a sugar found in
all proteins
lipids
DNA
RNA
A triglyceride is formed when three fatty acids join a glycerol by a
hydrolysis reaction
dehydration synthesis reaction
polymeric reaction
digestive reaction
Which of the following levels of a protein are susceptible to denaturation?
primary and secondary structures
secondary and tertiary structures
tertiary and quaternary structures
primary and tertiary structures
Which one of the following is a potential danger of anabolic steroids?
liver problems
heart problems
male breast development
All of the above answers are problems associated with anabolic steroids
DNA functions to ________, while RNA’s function is to________.
store the information to make a new organism; contain the information to make a new cell
stores genetic information; aids in the processing of the information within the DNA into proteins
store information to produce gametes; contain the information to make a protein
store information to produce proteins; contain the information to make DNA
How are lipids different from other categories of biological molecules?
They are not seen in all living things
They do not have carbon
They are much more complex
They will not combine with water
Which of the following is an organic molecule?
CO2
C6H12O6
NaCl
H2O
Humans store glucose in the form of
starch
glycogen
glucose
cellulose
In a dehydration reaction, ________. In order for this to occur water is ________.
monomers are joined to become a polymer; removed
polymers are broken up to form monomers; added
monomers are broken up to form polymers; added
polymers are joined to form monomers; removed
