WorksheetsMolecules of Life (Biochemistry) — Worksheet Questions (Grade 9)
Total questions: 150
Worksheet time: 1hrs 15mins
What element must all organic compounds contain?
carbon
hydrogen
nitrogen
oxygen
What other element is most commonly bonded to carbon in organic compounds?
hydrogen
chlorine
sodium
phosphorus
Based on the results of testing an unknown sample (refer to the last column of the table below), what conclusion can be drawn?
You can conclude whether or not a particular type of molecule is present.
You can determine the exact 3D structure of the molecule.
You can calculate the precise caloric value of the molecule.
You can locate the molecule’s exact position in the cell.
Match biomolecules to their monomers: Which of the following pairings are correct? Select all that apply.
carbohydrates — monosaccharide
lipids — amino acid
proteins — amino acid
nucleic acids — nucleotide
Which biomolecule primarily provides long‑term energy storage (approximately 9 Cal/g) and contributes to biological membranes and insulation?
lipids
carbohydrates
proteins
nucleic acids
Which biomolecule includes enzymes that control the rate of chemical reactions and contributes to structure and transport in and out of cells?
proteins
carbohydrates
lipids
nucleic acids
Which biomolecule stores and transmits genetic information, with ATP storing energy in its bonds?
nucleic acids
proteins
lipids
carbohydrates
We can assume that the function of certain biomolecules—such as an enzyme’s substrate specificity or a receptor’s signal specificity—is dependent on their what?
shape/structure
mass
color
cellular location
If a protein molecule is synthesized from 9 amino acids, how many peptide bonds are formed?
7
8
9
10
If a protein molecule is synthesized from 9 amino acids, how many molecules of water are formed?
7
8
9
10
If glycogen is broken down into 1248 glucose molecules, how many molecules of water were required?
1247
1248
624
1
If glycogen is broken down into 1248 glucose molecules, how many covalent bonds were broken?
1247
1248
624
1
A nucleic acid is broken down into the nucleotides that compose it, producing 5931 molecules of water. How many nucleotides were produced?
5930
5931
5932
6000
Identify the polymer and its monomer type shown in the top‑left image of connected hexagonal rings (polysaccharide chain).
carbohydrate polymer — monosaccharide monomers
protein polymer — amino acid monomers
nucleic acid polymer — nucleotide monomers
lipid — fatty acid and glycerol components
Identify the monomer and polymer represented by the top‑right structural diagram featuring an R group attached to the central carbon.
amino acid monomer — protein polymer
monosaccharide monomer — carbohydrate polymer
nucleotide monomer — nucleic acid polymer
fatty acid monomer — lipid
Identify the polymer shown in the bottom‑left image and name the three parts of its monomer.
RNA — sugar, phosphate, nitrogen base
DNA — glycerol, fatty acid, phosphate
protein — amino group, carboxyl group, R group
carbohydrate — carbon, hydrogen, oxygen
Identify the monomer parts depicted in the bottom‑right nucleotide structure diagram.
sugar, phosphate, nitrogen base
glycerol, fatty acid, phosphate
amino group, carboxyl group, R group
carbon, hydrogen, oxygen
Explain how the shape of a molecule relates to an enzyme’s function. Choose the statement that best reflects the worksheet explanation.
An enzyme’s function depends on the specific shape of its active site; if the active site’s shape changes, the enzyme no longer functions.
An enzyme’s function is independent of shape and relies only on temperature.
An enzyme’s function increases whenever the enzyme becomes larger in size.
An enzyme’s function is determined by the number of substrates present, not by shape.
Explain what it means to say an enzyme is denatured.
It has lost its structure (unfolded) so it no longer works.
It has gained energy and speeds up all reactions.
It splits every substrate into products without binding.
It becomes a DNA molecule that stores genetic information.
Select all true statements about how enzymes affect reaction rate.
They increase reaction rate by lowering the activation energy required to start the reaction.
They change the energy in the products and reactants, altering delta G.
They are not used up in a reaction.
They slow reactions by raising the activation energy.
Based on the pH activity graph, what is the optimal pH for gastric protease?
pH 2
pH 3
pH 5
pH 8
Based on the pH activity graph, what is the optimal pH for intestinal protease?
pH 3
pH 5
pH 7
pH 8
Based on the pH activity graph, at what pH do both proteases have some activity?
pH 2
pH 3
pH 5
pH 8
Identify the reactants in the cellular respiration equation C6H12O6+6O2→6CO2+6H2O+36ATP .
C6H12O6 and 6O2
6CO2 and 6H2O
36ATP only
C6H12O6 and 6CO2
Identify the reactants in the photosynthesis equation 6CO2+6H2O+Esun→C6H12O6+6O2 .
6CO2 , 6H2O , and sunlight energy
C6H12O6 and 6O2
6CO2 and 6O2
C6H12O6 and water only
How do the reactants and products of photosynthesis and cellular respiration compare?
The reactants of cellular respiration are the products of photosynthesis, and the reactants of photosynthesis are the products of cellular respiration.
Both processes share identical reactants and products with no differences.
Photosynthesis and cellular respiration have unrelated reactants and products.
Cellular respiration produces sunlight energy used as a reactant in photosynthesis.
What organelle is involved in photosynthesis?
Chloroplast
Mitochondrion
Nucleus
Ribosome
What organelle is involved with part of the cellular respiration pathway?
Mitochondrion
Chloroplast
Golgi apparatus
Vacuole
If there are 18 atoms of oxygen on the reactant side of a balanced equation, how many atoms of oxygen will be on the product side?
12
18
24
36
The equal number of atoms on each side of a balanced equation models which law?
Law of conservation of matter
Law of independent assortment
Law of superposition
Law of segregation
Explain how energy is transferred through photosynthesis starting with the sun and ending with carbohydrate. Choose the statement that best matches the worksheet description.
Light energy from the sun is captured by chlorophyll in plant cell chloroplasts and converted to chemical energy; the chemical energy is stored in ATP formed in the light reactions and transferred to carbohydrate molecules.
Light energy is directly turned into heat in leaves without forming ATP or carbohydrates.
Chemical energy begins in carbohydrates and is converted into sunlight energy by chlorophyll.
Energy transfer skips ATP and moves straight from light to proteins in the nucleus.
Which sequence correctly shows the order of molecules from glucose to ATP as chemical energy is transferred?
Glucose → Pyruvate → Citrate → ATP, NADH, FADH2 → 34 ATP
Glucose → Citrate → Pyruvate → ATP, NADH, FADH2 → 34 ATP
Glucose → ATP, NADH, FADH2 → Pyruvate → Citrate → 34 ATP
Citrate → Glucose → Pyruvate → ATP, NADH, FADH2 → 34 ATP
Which diagram shows a plant cell?
A
B
C
None of the diagrams
Which diagram shows a prokaryotic cell? Select all that apply.
A
B
C
Which diagram shows an animal cell?
A
B
C
None of the diagrams
Which diagrams show eukaryotic cells? Select all that apply.
A
B
C
Which diagram shows bacteria?
A
B
C
None of the diagrams
Which diagram does not have a nucleus?
A
B
C
All have a nucleus
Which diagrams have a nucleus? Select all that apply.
A
B
C
Which diagrams have ribosomes? Select all that apply.
A
B
C
What are two features to look for in a eukaryotic cell that help you determine it is eukaryotic and not prokaryotic?
Presence of a nucleus and membrane-bound organelles
Presence of a cell wall and flagella
Absence of DNA and ribosomes
Only single circular chromosome with no membranes
Which organelles are thought to be evidence supporting the theory of endosymbiosis? Select all that apply.
Mitochondria
Chloroplasts
Lysosomes
Peroxisomes
Which structures are common to all cells? Select all that apply.
Ribosomes
DNA
Cytoplasm
Cell membrane
Nucleus
Based on the labeled cell diagram, what is structure #5 and what is its main function?
Rough endoplasmic reticulum; modifies and packages proteins
Smooth endoplasmic reticulum; produces lipids
Golgi apparatus; digests macromolecules
Mitochondrion; generates ATP
In the labeled cell diagram, what is structure #1 and what does it do?
Nucleolus; produces ribosomes
Nucleus; stores genetic material
Centrosome; organizes microtubules
Lysosome; breaks down waste
In the labeled cell diagram, what is structure #7 and what is its purpose?
Cell membrane; maintains homeostasis by controlling what enters and leaves the cell
Cell wall; provides rigid external support
Mitochondrion; carries out cellular respiration
Vacuole; stores water and ions
What is structure #7 made of?
Two layers of phospholipids with hydrophilic heads and hydrophobic tails
A single layer of carbohydrates
Three layers of proteins forming a rigid barrier
A double layer of nucleic acids
Looking at the labeled cell diagram, what does the structure labeled #2 do and why is it important?
It is the nucleus; houses and protects DNA, acting as the cell's control center
It is the nucleolus; synthesizes rRNA and assembles ribosomal subunits
It is the mitochondrion; produces ATP for cellular energy
It is the Golgi apparatus; modifies and sorts proteins for secretion
What is structure #6 in the labeled cell diagram?
Golgi apparatus
Smooth endoplasmic reticulum
Lysosome
Centrioles
Structure #6 can form which structure(s) that help transport nutrients and wastes around and out of the cell via endocytosis and exocytosis?
Vesicles
Ribosomes
Microfilaments
Peroxisomes
Structure #3 synthesizes proteins for the cell. What is this structure called?
Ribosome
Mitochondrion
Lysosome
Vacuole
Which protein transmits information from the extracellular fluid to the inside of the cell?
Receptor
Transporter
Marker
Channel
Which protein shown in the membrane illustration would be used to move molecules across the cell membrane?
Transporter
Receptor
Marker
Structural filament
Which membrane protein is important in identifying cells as self to the immune system?
Marker
Receptor
Transporter
Pump
Fill out the table using the word bank diffusion, facilitated diffusion, vesicles, osmosis, pumps. Name the process that matches: movement of water down a concentration gradient.
diffusion
facilitated diffusion
vesicles
osmosis
pumps
For movement of water down a concentration gradient, identify whether the process is active or passive.
active
passive
For movement of water down a concentration gradient, does the process require ATP?
yes
no
Fill out the table using the word bank diffusion, facilitated diffusion, vesicles, osmosis, pumps. Name the process that matches: a “bubble” of membrane that transports materials into or out of the cell.
diffusion
facilitated diffusion
vesicles
osmosis
pumps
For a “bubble” of membrane that transports materials into or out of the cell, identify whether the process is active or passive.
active
passive
For a “bubble” of membrane that transports materials into or out of the cell, does the process require ATP?
yes
no
Fill out the table using the word bank diffusion, facilitated diffusion, vesicles, osmosis, pumps. Name the process that matches: movement of molecules from higher concentration to lower concentration through a protein.
diffusion
facilitated diffusion
vesicles
osmosis
pumps
For movement of molecules from higher concentration to lower concentration through a protein, identify whether the process is active or passive.
active
passive
For movement of molecules from higher concentration to lower concentration through a protein, does the process require ATP?
yes
no
Fill out the table using the word bank diffusion, facilitated diffusion, vesicles, osmosis, pumps. Name the process that matches: movement of small molecules through the cell membrane from a high concentration to low concentration.
diffusion
facilitated diffusion
vesicles
osmosis
pumps
For movement of small molecules through the cell membrane from a high concentration to low concentration, identify whether the process is active or passive.
active
passive
For movement of small molecules through the cell membrane from a high concentration to low concentration, does the process require ATP?
yes
no
Fill out the table using the word bank diffusion, facilitated diffusion, vesicles, osmosis, pumps. Name the process that matches: proteins embedded in the membrane that move large, polar or charged molecules against the concentration gradient, generally requiring energy.
diffusion
facilitated diffusion
vesicles
osmosis
pumps
For proteins embedded in the membrane that move large, polar or charged molecules against the concentration gradient, identify whether the process is active or passive.
active
passive
For proteins embedded in the membrane that move large, polar or charged molecules against the concentration gradient, does the process require ATP?
yes
no
Looking at the picture labeled to the left, which one displays endocytosis? Choose the letter of the diagram.
A
B
Which one displays exocytosis? Choose the letter of the diagram.
A
B
A cell does not contain mitochondria. Which of these transport processes does not occur? Select all that apply.
osmosis
diffusion
facilitated diffusion
pumps
vesicles
Explain why the mitochondria is important for the processes you selected above. Choose the best statement.
Mitochondria produces ATP energy required for active transport such as pumps and vesicles.
Mitochondria synthesizes membrane proteins for diffusion.
Mitochondria stores water to drive osmosis.
Mitochondria controls cell division to allow exocytosis.
Label the diagrams as isotonic, hypertonic, or hypotonic based on the environment outside of the cell. For the left diagram, which label applies?
isotonic
hypertonic
hypotonic
For the left diagram, which way will water move relative to the cell?
into the cell
out of the cell
no net movement
Label the diagrams as isotonic, hypertonic, or hypotonic based on the environment outside of the cell. For the middle diagram, which label applies?
isotonic
hypertonic
hypotonic
For the middle diagram, which way will water move relative to the cell?
into the cell
out of the cell
no net movement
Label the diagrams as isotonic, hypertonic, or hypotonic based on the environment outside of the cell. For the right diagram, which label applies?
isotonic
hypertonic
hypotonic
For the right diagram, which way will water move relative to the cell?
into the cell
out of the cell
no net movement
Draw a picture of what a cell (model: grape) would look like in each of these types of solutions. For hypotonic (tap water), what happens to the grape cell?
it swells
it shrinks
it remains the same size
Draw a picture of what a cell (model: grape) would look like in each of these types of solutions. For hypertonic (glucose solution), what happens to the grape cell?
it swells
it shrinks
it remains the same size
Draw a picture of what a cell (model: grape) would look like in each of these types of solutions. For isotonic (grape juice), what happens to the grape cell?
it swells
it shrinks
it remains the same size
Describe the mass change in each and water movement.
The cell will swell as water moves into the cell. Mass will increase
The cell will shrink as water moves out of the cell. Mass will decrease
There will be no noticeable change in the cell as water moves in and out at equal rates. The mass will stay the same
Transport across membranes ultimately helps a cell maintain homeostasis. The movement of molecules continues until a dynamic equilibrium is reached. What term describes the state that is reached when molecular movement continues until balance is achieved?
homeostasis
dynamic equilibrium
diffusion
active transport
Categorize the characteristic by selecting one category: cannot maintain homeostasis
viruses
all cells
just eukaryotic cells
just prokaryotic cells
both cells and viruses
Categorize the characteristic by selecting one category: do not metabolize or perform cellular respiration to make ATP
viruses
all cells
just eukaryotic cells
just prokaryotic cells
both cells and viruses
Categorize the characteristic by selecting one category: can only replicate inside of a living host cell
viruses
all cells
just eukaryotic cells
just prokaryotic cells
both cells and viruses
Categorize the characteristic by selecting one category: composed of protein capsid and nucleic acid
viruses
all cells
just eukaryotic cells
just prokaryotic cells
both cells and viruses
Categorize the characteristic by selecting one category: nucleic acid is DNA or RNA
viruses
all cells
just eukaryotic cells
just prokaryotic cells
both cells and viruses
Categorize the characteristic by selecting one category: nucleic acid single ring of DNA
viruses
all cells
just eukaryotic cells
just prokaryotic cells
both cells and viruses
Categorize the characteristic by selecting one category: nucleic acid is multiple linear chromosomes
viruses
all cells
just eukaryotic cells
just prokaryotic cells
both cells and viruses
Categorize the characteristic by selecting one category: use 20 amino acids in their proteins
viruses
all cells
just eukaryotic cells
just prokaryotic cells
both cells and viruses
Categorize the characteristic by selecting one category: marker proteins on surface
viruses
all cells
just eukaryotic cells
just prokaryotic cells
both cells and viruses
Categorize the characteristic by selecting one category: change over time (evolve) due to mutation of their nucleic acid
viruses
all cells
just eukaryotic cells
just prokaryotic cells
both cells and viruses
Categorize the characteristic by selecting one category: change over time due to accumulating plasmids from other cells
viruses
all cells
just eukaryotic cells
just prokaryotic cells
both cells and viruses
Eukaryotes protect their genome (DNA) inside a nucleus which is inside the cell. The nuclear envelope is a double membrane. How many layers of lipids are between the DNA and the environment outside the cell?
2
4
6
8
Prokaryotes protect their DNA inside the plasma membrane which is in turn covered with a cell wall of peptidoglycan (a sugar/protein complex). How is this similar to the location of nucleic acid in a virus?
Both place nucleic acid behind a protective structure; in viruses this structure is called the capsid
Both enclose nucleic acid within a cytoplasm
Both have nucleic acid enclosed in a membrane
Both have circular nucleic acid
Prokaryotes protect their DNA inside the plasma membrane which is in turn covered with a cell wall of peptidoglycan (a sugar/protein complex). How is it different from viruses?
Viruses do not have a cytoplasm that their nucleic acid is in nor is the nucleic acid enclosed in a membrane
Prokaryotes can have DNA or RNA, while viruses always have DNA
Viral genomes are circular while prokaryotic genomes are linear
Prokaryotes always have DNA, while viruses can have DNA or RNA
Prokaryotes have their DNA in a circle; viral DNA/RNA is linear
Viruses are spread through 3 common vectors. Select all that apply.
body fluids such as snot, spittle, and blood
contaminated food/water such as undercooked meat, unwashed vegetables, or nonpotable water
zoonotic sources such as mosquitoes, ticks, bats, and birds
clean water and sterile instruments
Viruses cause disease by which mechanisms? Select all that apply.
damaging or killing cells in the host organism
causing infected cells to produce toxins
having molecular components that are toxic, such as an envelope
increasing host cell ATP production to boost immunity
DNA stands for what full name?
Deoxyribonucleic acid
Deoxyribose nucleic acid
Deoxyribosomal acid
Deoxyribonitric acid
RNA stands for what full name?
Ribonucleic acid
Ribosomal nucleic acid
Ribonitric acid
Ribose nucleic acid
Complete the statement: All somatic cells in all ______ contain DNA.
living organisms
bacterial plasmids
nonliving materials
only nervous tissues
Complete the statement: The sequence of DNA determines the ______, or characteristics, in living organisms.
traits
masses
charges
membranes
Complete the statement: The sequence of DNA is the template for making ______.
proteins
lipids
glycogen
cellulose
Based on the chart of differences, which sugar is found in DNA?
Deoxyribose
Ribose
Glucose
Fructose
Based on the chart of differences, which sugar is found in RNA?
Ribose
Deoxyribose
Glucose
Galactose
Which description matches the overall shape of DNA according to the chart of differences?
Double helix
Single stranded
Beta sheet
Spherical
Which description matches the overall shape of RNA according to the chart of differences?
Single stranded
Double helix
Linear crystal
Triple helix
Which set lists the nucleotides present in DNA according to the chart of differences?
A, T, G, C
A, U, G, C
A, T, U, C
A, U, G, T
Which set lists the nucleotides present in RNA according to the chart of differences?
A, U, G, C
A, T, G, C
A, U, T, C
A, T, G, U
DNA and RNA are made of smaller subunits called nucleotides which are made up of three parts. Which list correctly identifies these three parts?
5-carbon sugar, phosphate, nitrogen base
Amino group, carboxyl group, R-group
Phosphate, fatty acid tails, glycerol
Ribosome, tRNA, mRNA
Use the DNA strand shown to determine the sequence of nucleotides for the complementary strand. The original strand is labeled 3’ ACG-TCG-AAG-CCA 5’. Which complementary sequence is correct?
5’ TGC-AGC-TTC-GGT 3’
5’ TGA-AGC-TTC-GGT 3’
5’ TGC-AGC-TTG-GGT 3’
5’ TGC-ACG-TTC-GGT 3’
In DNA, purines bond with pyrimidines. Which base does adenine bond with?
Thymine
Cytosine
Guanine
Uracil
In DNA, purines bond with pyrimidines. Which base does guanine bond with?
Cytosine
Thymine
Adenine
Uracil
Which type of bonds hold the nitrogen bases together in DNA?
Hydrogen bonds
Ionic bonds
Covalent bonds
Peptide bonds
What process is shown in the diagram to the right, and why is it important?
DNA replication, because it copies DNA to produce two identical strands
Transcription, because it translates mRNA into protein
Translation, because it synthesizes RNA from DNA
Mitosis, because it divides the cytoplasm to form two cells
Where does DNA replication occur?
Nucleus of eukaryotic cells
Cytoplasm of eukaryotic cells
Mitochondrial intermembrane space
Golgi apparatus
During which part of the cell cycle does DNA replication occur?
S phase of interphase
G2 phase of interphase
Metaphase of mitosis
G1 phase of interphase
Which enzyme unwinds and unzips the DNA molecule at the start of replication?
DNA helicase
DNA polymerase
RNA primase
Ligase
Which enzyme lays down the RNA primers during DNA replication?
Primase
Ligase
Topoisomerase
Exonuclease
Which enzyme begins laying down DNA nucleotides in the 5’ to 3’ direction, adding to the 3’ end?
DNA polymerase
Ligase
RNA polymerase
Helicase
On the lagging strand, the Okazaki fragments created will be joined by which enzyme?
Ligase
Helicase
Primase
DNA polymerase
What is the overall direction of DNA replication relative to the replication fork?
5’ to 3’ toward the replication fork
3’ to 5’ away from the replication fork
5’ to 3’ away from the replication fork
3’ to 5’ toward the replication fork
Which term describes the process in which each new DNA molecule contains one original strand and one newly constructed strand?
Semiconservative replication
Conservative replication
Dispersive replication
Reductive replication
Which term describes the orientation of the two DNA strands relative to each other?
Antiparallel
Parallel
Perpendicular
Iso-directional
In a basic drawing of a duplicated chromosome, which description correctly identifies its main parts?
two sister chromatids joined at a centromere
a single chromatid with multiple nucleoli
several ribosomes attached to a spindle fiber
four chromatids joined at two nuclei
Select the correct labels you would apply to a duplicated chromosome.
sister chromatids
centromere
spindle fibers
nucleolus
What is chromatin?
the genetic material in the nucleus that is long and thin
the protein that forms spindle fibers
the fluid in the cytoplasm surrounding organelles
the membrane separating the nucleus from cytoplasm
Where would you find chromosomes inside of the cell?
nucleus
cytoplasm
mitochondria
ribosome
What is a genome?
the complete set of genes (DNA) of an organism
a single chromosome
the division of the cytoplasm
the set of organelles in a cell
According to the cell cycle diagram, which stages belong to interphase?
G1
S
G2
M (mitosis)
What happens in the G1, S, and G2 stages within interphase?
G1 decides whether to replicate and carries out daily functions; S is DNA replication; G2 checks replication and organelles replicate
G1 is DNA replication; S prepares for mitosis; G2 is when the cell exits the cycle
G1 is cytokinesis; S is cell growth only; G2 is when chromosomes pair with homologs
G1 begins mitosis; S forms spindle fibers; G2 dissolves the nuclear envelope
Which phase does DNA replication take place, and what happens to the amount of DNA during this process?
S phase; the amount of DNA increases from one copy to two copies
G1; the amount of DNA decreases by half
G2; the amount of DNA remains unchanged
M phase; the amount of DNA increases only during metaphase
What are the four stages of mitosis?
prophase, metaphase, anaphase, telophase
interphase, prophase, anaphase, cytokinesis
metaphase, telophase, interphase, anaphase
prophase, S phase, G2, telophase
What phase starts in late telophase, but is not part of mitosis?
cytokinesis
interphase
metaphase
G1
Where do our cells spend 90% of the time?
interphase (mostly G1)
mitosis (M phase)
cytokinesis
S phase only
Using the stages shown, which labels are stages of mitosis?
prophase
metaphase
anaphase
telophase
cytokinesis
Why is mitosis important in your body? Select all that apply.
growth
repair
reproduction
digestion
respiration
After mitosis, how many chromosomes are in each daughter cell compared to the parent cell in humans?
46 in daughter cells; 46 in parent cells
23 in daughter cells; 46 in parent cells
46 in daughter cells; 23 in parent cells
23 in daughter cells; 23 in parent cells
What type of cells does mitosis produce?
somatic (body) cells
gametes (sex cells)
haploid spores
stem cells only
Uncontrolled cell division is more commonly known as what, when the cells repeat the cell cycle faster than normal?
cancer
apoptosis
meiosis
senescence
How many chromosomes TOTAL do humans have, and how many pairs?
46 total, 23 pairs
44 total, 22 pairs
48 total, 24 pairs
23 total, 46 pairs
Which description best fits the cells that result from mitosis?
2 identical somatic cells
2 nonidentical gametes
1 diploid cell and 1 haploid cell
4 identical daughter cells
If a mutation alters the production of cyclin or cyclin dependent kinase, interfering with normal cell cycle controls, the result is usually what?
cancer
cell differentiation
meiosis
programmed cell death
Which stage of the cell cycle involves the separation of the sister chromatids by the spindle?
anaphase
prophase
metaphase
telophase
Which stage of the cell cycle involves the condensing of the chromosomes and breakdown of the nuclear envelope?
prophase
anaphase
metaphase
telophase
Which stage of the cell cycle involves the chromosomes lining up across the equatorial plane?
metaphase
prophase
anaphase
telophase
Which stage of the cell cycle involves the uncoiling of the chromosomes into diffuse chromatin and reformation of the nuclear envelope?
telophase
prophase
metaphase
anaphase
Fill in the chart regarding RNA types: Which statement correctly describes messenger RNA (mRNA)?
Located in nucleus and cytoplasm; takes message from DNA to ribosome
Located only in cytoplasm; makes up part of the ribosome
Located in cytoplasm; brings amino acids from cytoplasm to ribosome
Located in nucleus only; copies the entire genome
