WorksheetsBiology Final Exam
Total questions: 128
Worksheet time: 1hrs 4mins
Which type of reasoning involves starting with specific observations and developing a general principle based on those individual observations?
irrational
flawed
deductive
inductive
The __________ rule states that atoms tend to establish full outer energy levels when bonding.
octet
duplicate
covalent
electronegative
Use the periodic table (attached to the back of the exam) to determine how many valence electrons nitrogen (N) has.
2
3
4
5
________ bonds are found WITHIN one water molecule, and ________ bonds develop BETWEEN 2 or more water molecules.
Covalent, hydrogen
Hydrogen, covalent
Ionic, covalent
Covalent, ionic
These are the weakest type of bond we discussed in class and involve the constant shifting of electrons around an atom, creating temporary and ever-changing positive and negative regions of an atom (even in nonpolar molecules).
covalent bonds
Van der Waals forces
ionic bonds
hydrogen bonds
Which term does the following definition match best with: the attraction of a particular atom for the electrons in a covalent bond?
Hydrogen bonding
Van der Waals interactions
Electronegativity
Valence number
Water expands when it freezes (goes from its liquid to solid form). What effect below results from this property of water?
ice sinks in water
ice floats on water
ice cannot form in liquid water
water can move from the roots to the crown of a tree
This figure is depicting a molecule of ___________.
Hydrogen peroxide
Water
Carbon Dioxide
Methane
Which characteristic(s) below describe(s) this molecule?
polar
nonpolar
ionically bonded
a & c
This molecule is attracted to glass due to which of the properties listed below?
Hydrophobic nature
Acidity
Adhesion
Cohesion
Which functional group is circled below?
Hydroxyl
Carboxyl
Carbonyl
Methyl
Water is very good at dissolving a lot of different substances. Therefore, we say that water is a powerful ______________.
solute
solvent
solution
ion
Which lipid makes up the majority of cell membranes?
Phospholipid
Triglyceride
Steroid
Ribose
What is the covalent bond that bonds monosaccharides together called?
Peptide bond
Glycosidic linkage
Phosphodiester bond
Van der Waals interactions
Which of the following polysaccharides acts as a structural component in plants?
Cellulose
Starch
Glycogen
Chitin
Which of the following polysaccharides acts as a storage component in animals?
Cellulose
Starch
Glycogen
Chitin
Sucrose is made of which two monosaccharides?
Glucose + fructose
Galactose + glucose
Galactose + ribose
Glucose + glucose
Which type of lipid is composed of 3 fatty acid chains attached to a glycerol backbone?
Triglyceride
Fatty acid
Phospholipid
Steroid
What type of covalent bond joins individual amino acids together?
Peptide bond
Glycosidic linkage
Amino bond
Phosphate bond
Nucleotides are bonded together via a ________________ bond.
Peptide
Phosphodiester
Glycosidic linkage
Hydrogen
The chemical formula C6H12O6 represents which of the following?
Ribose
Glucose
Amino acid
Sucrose
Antibodies are a type of which group of biological macromolecules?
Lipid
Protein
Carbohydrate
Nucleic Acid
Which of the following is function of proteins?
speeding up chemical reactions
structure
cell-to-cell communication
all of the above
Which list below includes all parts that make up a nucleotide?
Nitrogenous base
Nitrogenous base + sugar + phosphate group
Sugar + phosphate group
Sugar + phosphate group + amino acid
Which type of fat is solid at room temperature?
saturated
unsaturated
polar
glucose
ATP stands for:
Amino triphosphate
Amino triplephosphate
Adenine triphosphate
Adenosine triphosphate
What do the initials “DNA” stand for?
deoxynucleic acid
ribonucleic acid
deoxyribonucleic acid
deoxyribose
Carbon has four electrons in its valence shell. Therefore, it needs _____ more electrons to completely fill its valence shell.
1
2
3
4
Which macromolecule generally has 2 hydrogen atoms for every 1 oxygen and 1 carbon atom?
Amino acid
Protein
Nucleic acid
Carbohydrate
Which is the correct order of the “central dogma” of biology?
RNA - DNA - protein
protein - RNA - DNA
DNA - RNA - protein
DNA - protein - RNA
Muscle cells contain numerous _____________ to serve their high demand for ATP.
Golgi apparatuses
ribosomes
mitochondria
lysosomes
Who was the first person to observe cells (cork cells) under a microscope?
van Leeuwenhoeke
Remak
Hooke
Schleiden
Which of the following is/are (a) tenet(s) of the modern cell theory?
all living things are composed of at least one cell
cells are the smallest/most basic unit of life
all cells come from other cells via cell division
all of the above
A cell with a lot of ribosomes is producing a lot of ___________.
carbohydrates
lipids
energy
proteins
Which statement below best describes why cell size is limited?
cells with a large volume and relatively low surface area are highly efficient at transporting nutrients across the membrane
cells with a low volume and relatively high surface area are highly efficient at transporting nutrients across the membrane
the larger the surface area to volume ratio is, the more likely a cell is to be hypertonic
the smaller the surface area to volume ratio is, the more likely a cell is to be hypotonic
Which of the following can be found in animal (eukaryotic) cells but NOT in bacteria (prokaryotic cells)?
DNA
nucleus
ribosomes
phospholipids
Mitochondria likely arose ________________________.
from prokaryotic endosymbionts
from the endomembrane system
from genetic mutations
as a response to increased sunlight on Earth
What is the largest organelle in a eukaryotic cell?
ribosome
nucleus
Golgi apparatus
lysosome
Autolysis (or cell suicide) involves the digestion of a surplus cell by itself. What organelle is responsible for this process?
ribosome
nucleus
Golgi apparatus
lysosome
In order for a plant cell to remain in its “normal” state (turgid), the environment surround the cell must be ___________________compared to the cell’s internal solute concentration.
isotonic
hypertonic
hypotonic
plasmolyzed
Regions of the cell membrane that contain a lot of cholesterol molecules ______________.
detach from the plasma membrane and clog arteries
have higher rates of lateral diffusion of lipids and proteins into and out of these regions
are more fluid than the rest of the membrane
are less fluid than the rest of the membrane
Which of the following types of molecules will need a transport protein to help it move across the plasma membrane?
large, polar molecule
charged molecule
non-polar molecule
both a and b
Cell membrane proteins are important for transporting materials across the membrane, but they also have other functions. Which of the following is/are (a) functions of membrane proteins?
enzymatic activity
signal transduction
intercellular joining
all of the above
Elodea is a plant which normally grows in freshwater ponds. If Elodea leaves are placed in a jar of sea water (which has a very high salt content), the solution outside the cell will be
hypotonic to the Elodea cells
hypertonic to the Elodea cells
isotonic to the Elodea cells
none of the above
The sodium-potassium pump is moving sodium (Na+) _______________ its concentration gradient and potassium (K+) _____________ its concentration gradient.
up, up
down, down
up, down
down, up
Which of the following types of transports requires a transport protein but no ATP (energy)?
active transport
simple diffusion
facilitated diffusion
none of the above
One result of the sodium-potassium pump is a ______________ charge inside the cell, which creates a type of energy referred to as membrane potential.
positive
negative
neutral
none of the above
When does a cell check to determine if the spindles have attached to the chromosomes?
S phase checkpoint
metaphase checkpoint
G0
G1 checkpoint
Which list below places the stages of mitosis in the correct order, from first to last?
Prometaphase, prophase, metaphase, anaphase, telophase
Prophase, metaphase, anaphase, prometaphase, telophase
Prophase, prometaphase, metaphase, telophase, anaphase
Prophase, prometaphase, metaphase, anaphase, telophase
Which stage of the cell cycle is the cell below currently in?
interphase
prophase
metaphase
telophase
Which checkpoint(s) in the cell cycle check(s) for errors/damage in the DNA?
G1 checkpoint
M checkpoint
G2 checkpoint
both a and c
You are looking at a cell under a microscope and notice that it only has one copy of DNA. Which stage(s) below might the cell currently be in?
G1
G2
Prophase
a or b
During which of the following stages of the cell cycle is DNA replicated/synthesized?
G1
G2
S
Prophase
One purpose of the cell cycle is to regenerate tissues. Which of the following descriptions most accurately describes what that means?
the chromosomes in a cell move to opposite poles
a multi-celled organism develops from a single cell, which multiplies many times to allow for growth
a single-celled organism reproduces
dead cells are replaced by living ones
During which stage of the cell cycle is DNA still in its uncondensed form (i.e., chromatin)?
interphase
prophase
metaphase
anaphase
Which statement below best describes the result of mitosis?
one cell with two copies of DNA
two cells, each with one copy of DNA
two cells, each with two copies of DNA
one cell with one copy of DNA
Which stage of mitosis is the cell below currently in? (Hint: the chromatids are moving to opposite poles of the cell.)
anaphase
metaphase
prophase
telophase
Which statement below describes the relationship between photosynthesis and respiration?
glucose is created during photosynthesis and broken down during respiration
glucose is broken down during photosynthesis and created during respiration
photosynthesis occurs in the mitochondria and respiration occurs in the chloroplast
all of the above
Energy is ____________ during an exergonic reaction.
conserved
unchanged
used
released
How does an enzyme speed up the rate of a chemical reaction?
By increasing the activation energy
By increasing the free energy
By decreasing the activation energy
By decreasing the free energy
A system that is highly ordered contains a lot of free energy (high G) and is also ______ than a system with a small amount of free energy.
less stable
more stable
less able to perform work
a & c
What is the name of the process that leads to one phosphate group being removed from ATP (and thus, releasing energy) with the help of water?
hydrolysis
phosphorylation
Kinase
dehydrogenase
The reaction in the graph above is ___________.
Isogonic
Endergonic
Exergonic
Catabolic
Is the change in free energy (DG) in the reaction above negative or positive?
negative
positive
What category below do many antibiotics fall into?
Cofactors
Enzyme activators
Coenzymes
Enzyme inhibitors
Energy ________ an ecosystem.
is recycled in
flows through
builds up in
none of the above
Choose the best definition for metabolism.
The recycling of water by an organism
The creation of energy by an organism
The conservation of energy
The sum of all chemical reactions in an organism
Which circled part of the ATP molecule below contributes most to its ability to provide energy for cells?
a
b
c
d
How many molecules of ATP are made during cellular respiration?
2
20
32
36
The products of respiration are: ATP, carbon dioxide, and _________.
pyruvate
water
oxygen
glucose
Which process does fermentation keep going over and over again?
citric acid cycle
chemiosmosis
electron transport chain
glycolysis
Where do the six molecules of CO2 produced in respiration come from?
2 from pyruvate oxidation, 4 from citric acid cycle
4 from pyruvate oxidation, 2 from citric acid cycle
1 from glycolysis, 5 from citric acid cycle
5 from glycolysis, 1 from citric acid cycle
Assuming you start respiration with one molecule of glucose, how many rounds of the citric acid (Krebs) cycle is required to complete the respiration process?
1
2
3
4
What is the final electron acceptor in the electron transport chain at the end of respiration?
carbon
water
oxygen
phosphate
Which two molecules combine at the beginning of the citric acid (Krebs) cycle to create citrate?
glucose + pyruvate
pyruvate + acetyl CoA
acetyl CoA + oxaloacetate
oxaloacetate + G3P
What is the purpose of the electron transport chain? (What process is it powering?)
pumping of H+ ions across a membrane
the citric acid cycle
pyruvate oxidation
regeneration of oxaloacetate
Which stage of respiration produces the majority of the total ATP produced by respiration?
glycolysis
pyruvate oxidation
oxidative phosphorylation
citric acid cycle
Which molecule below shuttles electrons to the electron transport chain during respiration?
amino acids
NADH
ATP
ADP
What stage of respiration is shown by the following reaction: C6H12O6 à 2 pyruvate?
glycolysis
citric acid cycle
Calvin cycle
pyruvate oxidation
Which of the following parts of respiration is the only one that occurs outside the mitochondria?
chemiosmosis
citric acid cycle
glycolysis
pyruvate oxidation
What is the very first step in photosynthesis?
Chemiosmosis
Electron transport chain
Electron excitation
Light absorption
H+ gradients (differences in concentration across a membrane) are created during which of the following processes?
respiration
photosynthesis
enzyme inhibition
a & b
Oxygen is released as a result of photosynthesis. Which statement below best describes where this oxygen comes from?
water is split during the light-dependent reactions, resulting in the release of an oxygen molecule
glucose is split in the Calvin cycle, resulting in the release of an oxygen molecule
electrons are added to NAD+, resulting in the production of NADH and oxygen
rubisco helps “fix” CO2, which creates oxygen as a by-product
To create ATP in photosynthesis, H+ ions diffuse from the ___________ to the ____________ through ATP synthase.
thylakoid space, stroma of the chloroplast
stroma of the chloroplast, thylakoid space
stroma of the chloroplast, intermembrane space
intermembrane space, stroma of the chloroplast
How many CO2 molecules are required for one round of the Calvin cycle?
1
2
3
4
Many leaves are green because ____________.
they only absorb green light
they reflect green light
they absorb all colors of light equally
they reflect all color of light equally
In CAM (Crassulacean acid metabolism) photosynthesis, plants open their stomata to exchange gases during the ____________.
day
night
a & b
none of the above
In order to produce one molecule of glucose, how many ATP molecules are used in the Calvin cycle?
3
6
9
18
Where does the Calvin cycle occur?
matrix of mitochondria
thylakoid membrane
stroma of chloroplast
cytoplasm/cytosol
Why is the fact that plants use CO2 in photosynthesis important to us as humans?
They remove CO2 from the atmosphere, which decreases the heat-trapping ability of the atmosphere, keeping the climate stable
They convert CO2 (a carbon molecule that is unusable by us) into glucose (a carbon molecule that we can use).
a & b
none of the above
Photosynthetic pigments (such as chlorophyll) are found in the _____________ of the chloroplast.
thylakoid membrane
stroma
ATP synthase
mitochondria
What enzyme (said to be the most abundant enzyme on earth!) is used to combine RuBP and CO2 in the Calvin cycle?
kinase
dehydrogenase
rubisco
NADPH
Which description below best describes homologous chromosomes?
chromosomes with different genes on them
chromosomes with the same genes, but different alleles on them
chromosomes with the same alleles, but different genes on them
an extra copy of a chromosome
What is the final product of meiosis?
one cell with 2 copies of DNA
two cells, each with 1 copy of DNA
two cells, each with 2 copies of DNA
four cells, each with 1 copy of DNA
At which point in meiosis does Mendel’s Law of Independent Assortment apply?
during Prophase I when chromosomes are condensing
during Telophase II when sister chromatids are separating
during Metaphase I when homologous chromosomes line up in the middle of the cell
during the first round of cytokinesis
When does crossing over occur?
Prophase I
Prophase II
Anaphase I
Anaphase II
What does it mean to say a cell is haploid?
it has two copies of each chromosome
it has one copy of each chromosome
it is missing a sex chromosome
it has one extra sex chromosome
What is the name for the process when homologous chromosomes pair up?
crossing over
synapsis
independent assortment
none of the above
After Meiosis I, how many cells are present?
1
2
3
4
A butterfly is heterozygous for wing color and homozygous dominant for leg length. If the letter “W” is used to denote wing color and the letter “P” is used to denote leg length, what is the genotype of this individual?
WwPP
Wwpp
WWPp
WwPp
If two parents who are heterozygous for two genes (i.e., AaBb) have offspring, what is the phenotype ratio of their offspring?
3:1
1:2:1
9:3:3:1
4:0
The human blood type system does not follow a complete dominance pattern. Which inheritance pattern does the human blood type system fall into?
multiple alleles
polygenic inheritance
pleiotropy
environmental influences
What is the name for the inheritance pattern when multiple genes are involved in creating a specific phenotype?
pleiotropy
polygenic inheritance
multiple alleles
complete dominance
If a red-flowered plant is crossed with a white-flowered plant and the heterozygous offspring are pink, what type of dominance is this?
complete dominance
co-dominance
incomplete dominance
anti-dominance
If the genotype of one parent (for a specific gene) is unknown, a homozygous recessive individual can be crossed with the unknown parent to determine his/her genotype. What is the term for this type of cross?
true breeding cross
aneuploid cross
unknown dihybrid cross
test cross
A(n) __________ is an alternative version of a gene (e.g., a purple flower vs. a white flower).
allele
locus
character
none of the above
If you performed a cross between the genotypes Tt and tt, what percent of the offspring would you expect to be homozygous recessive for the gene?
25% (1 of 4)
50% (2 of 4)
75% (3 of 4)
100% (4 of 4)
In humans, why are X-linked recessive traits more commonly expressed in males than females?
females cannot inherit X-linked genes
females always inherit at least one dominant form of the gene, which means the recessive allele will not be expressed
males have only one X-chromosome, so there is no second allele to potentially mask the recessive allele
males have two X-chromosomes that each contain the recessive allele
Which of the terms below describes a situation where one gene affects multiple phenotypic traits?
polygenic inheritance
autosome
multiple alleles
pleiotropy
Non-disjunction of chromosomes during meiosis results in _______________.
aneuploidy
polytropy
pleiotropy
diploidy
If the recombination frequency between two genes is less than 50%, this means __________.
linkage between the two genes in not likely
linkage between the two genes is likely
the parental-type percentage of offspring is also less than 50%
none of the above
Which of the following would be considered a true-breeding individual?
homozygous dominant
homozygous recessive
heterozygous
a & b
This man, a monk, is known as the “father of modern genetics.”
Mendel
Watson
Crick
Franklin
A mutation has occurred in the chromosome shown below. The one on the left is the normal version of the chromosome; the one on the right is the chromosome with the mutation. What is the name for this type of mutation?
translocation
inversion
deletion
duplication
Another name for Down syndrome is _____________.
Klinefelter’s syndrome
Turner’s syndrome
Trisomy 21
none of the above
What is meant by the description "antiparallel" regarding the strands that make up DNA?
DNA strands form a double helix
Complementary base pairs occur between purines and pyrimidines
The 3’ end of one strand matches up with the 5’ end of the other strand
Electric charge along the DNA molecule differs between the strands.
Which of the following statements about Okazaki fragments is FALSE?
They contain both DNA and RNA
hey are formed on the lagging strand
They remain as discontinuous fragments after replication is completed
They are synthesized in the 5’ to 3’ direction
Which of the following combinations shows the correct bonding pattern between nucleotides (between two individual strands of DNA)?
adenine + guanine
cytosine + guanine
thymine + guanine
cytosine + thymine
Which protein is responsible for adding new bases to the growing DNA daughter strand?
DNA polymerase
ligase
topoisomerase
isomerase
Which of the people below did NOT help to discover the structure of DNA?
Watson
Crick
Franklin
Mendel
What does DNA stand for?
dinitronucleic acid
deoxyribonucleic acid
deoxynitronucleic acid
diribonucleic acid
What are the three components of a nucleotide?
sugar, phosphate, and amino acid
sugar, protein, and amino acid
sugar, ATP, and nitrogenous base
sugar, phosphate, and nitrogenous base
Which term below describes the following aspect of DNA replication: the new DNA molecule is made up of one “parent strand” and one “daughter strand.”
semi-discontinuous
bi-directional
semi-conservative
none of the above
To which end of the growing DNA strand are new nucleotides added?
3’
5'
both of the above
none of the above
What type of bond forms between nitrogenous bases on complementary DNA strands?
nitrogen bonds
hydrogen bonds
phosphodiester bonds
glycosidic bonds
The strand labeled EàF is being built continuously, not in fragments like strand CàD. What is this strand (EàF) called?
Okazaki strand
lagging strand
parent strand
leading strand
Point C is located at the ____ end of the newly created strand of DNA.
3'
5'
The ultimate source of energy on Earth is ______________.
Glucose
Inorganic carbon
Water
Sunlight
