Font size
WorksheetsConcept 6- cells
Total questions: 65
Worksheet time: 33mins
Which statement best distinguishes magnification from resolution in microscopy?
Magnification increases image clarity by reducing noise
Magnification enlarges apparent size without improving detail
Resolution enlarges specimens to match real size closely
Resolution measures contrast differences across stained parts
Which improvement most increases contrast in light microscopy when viewing cells?
Using shorter wavelengths of light only
Staining or labeling specific cell components
Increasing magnification above 2,000×
Switching to oil immersion objectives
Match each microscope type to its primary use.
Light microscope (LM)
Viewing live cells with stained components
Scanning electron microscope (SEM)
Imaging surface topography in 3D-like detail
Transmission electron microscope (TEM)
Examining internal structures in thin sections
Which pair correctly matches concept with definition?
Magnification
Ratio of image size to real specimen size
Resolution
Minimum distance to distinguish two points as separate
Contrast
Differences in sample parts accentuated by staining
Cytology
Study of cell structures with microscopes
Which statement best explains why most cells are microscopic rather than large?
Surface area grows faster than volume as cells enlarge
Volume grows faster than surface area as cells enlarge
Surface area and volume increase at the same rate in cells
Cells stop metabolizing when they exceed a certain diameter
Which feature distinguishes eukaryotic cells from prokaryotic cells?
Circular DNA located in a nucleoid region
Presence of membrane-bound organelles with specialized functions
Smaller average size of individual cells
Cell walls composed of peptidoglycan structures
As a cell increases in size, what happens to its surface area-to-volume ratio?
The ratio fluctuates randomly during growth
The ratio decreases because volume increases faster
The ratio increases steadily with cell growth
The ratio remains constant regardless of size
Which statement about the plasma/cell membrane is accurate?
It stores most genetic instructions for the cell
It acts as a selective barrier controlling exchanges
It provides energy by cellular respiration directly
It prevents all molecules from entering the cell
Which description correctly contrasts cytosol and cytoplasm?
Cytosol is the fluid; cytoplasm includes organelles
Cytoplasm is fluid only; cytosol includes organelles
Cytosol is outside the cell; cytoplasm is inside
Both terms mean the same in all contexts
What is chromatin best described as?
A matrix of cytosolic fibers
A ribosome subunit pair
DNA with associated proteins
Dense nucleolar granules
Which cells are most likely to have many bound ribosomes?
Pancreas secretion cells
Muscle contraction cells
Skin barrier cells
Neuron signaling cells
Which feature distinguishes smooth ER from rough ER?
Lumen continuous with nucleus
Attachment to nuclear envelope
Lack of ribosomes on surface
Presence of ribosomes on surface
Which function is primarily associated with the smooth ER in liver cells?
Folding nascent polypeptides
Adding carbohydrates to proteins
Detoxifying drugs and poisons
Packaging proteins into vesicles
Multiple processes occur in smooth ER. Which are true?
Synthesis of oils and steroids
Storage of calcium ions
Addition of signal peptides
Carbohydrate attachment forming glycoproteins
Which statement best describes the Golgi apparatus role in the endomembrane system?
It modifies, sorts, and ships cell products
It digests macromolecules with enzymes
It synthesizes proteins using ribosomes
It generates ATP during cellular respiration
Phagocytosis(moving solids into a cell) initially produces a food vacuole that
Moves to the nucleus for storage
Exits the cell through exocytosis
Fuses with lysosomes for digestion
Becomes the central vacuole in plants
Which disease example illustrates a missing lysosomal enzyme leading to substrate buildup?
Diabetes mellitus raising blood glucose
Cystic fibrosis reducing chloride transport
Sickle-cell anemia affecting hemoglobin
Tay–Sachs disease accumulating lipids
Which statement about plant central vacuoles is accurate?
They generate ATP for cellular respiration
They store cell sap distinct from cytosol
They synthesize ribosomal RNA transcripts
They fuse with lysosomes in animal cells
Contractile vacuoles in freshwater protists primarily
Pump excess water out to maintain water balance; found primarily in protists
Create glucose through photosynthesis
Break down lipids during starvation
Transport proteins to the Golgi cis face
What cellular advantage results from a large central vacuole in plant cells?
Speeds lysosomal enzyme synthesis
Raises cytosolic pH above neutrality
Allows cell growth with minimal new cytoplasm
Decreases surface area relative to volume
Which statement about the number of mitochondria in cells is accurate?
Number is fixed by organism’s genome size
Number correlates with aerobic metabolic activity
Number depends only on cell age
All cells have exactly one mitochondrion
Peroxisomes carry out oxidation reactions. Which byproduct is formed and then detoxified by peroxisomal enzymes?
Nitric oxide
Carbon dioxide gas
Hydrogen peroxide
Ammonia
What is a role of liver peroxisomes in humans?
Synthesize chlorophyll for photosynthesis
Detoxify alcohol by transferring hydrogen to oxygen
Replicate circular chromosomes
Produce ribosomes for the cytosol
What is the main role of centrosomes in many animal cells?
Digest worn-out organelles
Produce ATP for cellular energy
Store calcium for muscle contraction
Organize microtubule growth near nucleus
During cell division, how do microtubules contribute?
Pump ions across membranes
Copy DNA with polymerase
Anchor ribosomes to rough ER
Separate chromosomes during mitosis
Which features distinguish cilia from flagella in movement?
Neither requires ATP energy
Both move identically straight
Flagella move with undulatory waves
Cilia are shorter and cause the organisms to tumble in the water
Cytoplasmic streaming in plant cells mainly results in what outcome?
Thickens the cortex to stop movement
Breaks down microtubules for mixing
Creates circular flow speeding transport
Halts material distribution across the cell
Which structure primarily protects plant cells, maintains shape, and prevents excessive water uptake?
Primary cell wall layer
Plant cell wall overall
Middle lamella region
Plasma membrane bilayer
Which intercellular junction forms continuous belts that prevent extracellular fluid leakage between animal cells?
Gap junctions
Plasmodesmata
Desmosomes
Tight junctions
Desmosomes are best described as structures that:
Digest ECM proteins
Fasten cells into sheets
Fuse membranes completely
Create cytoplasmic channels
Gap junctions permit passage of which types of molecules between adjacent animal cells?
Ions
Small signal molecules
Sugars
Large proteins
Amino acids
Shape, protection (2 ANSWERS)
cell membrane
cell wall
ribosomes
nuclear envelope
Detoxify alcohol and other harmful compounds by transferring hydrogen from the poisonous compounds to oxygen
peroxisomes
lysosomes
Golgi apparatus
Smooth ER
MAKES RIBOSOMES, MIGHT HAVE 2 OR MORE or A WHOLE BUNCH MAY PLAY A ROLE IN CONTROLLING CELL DIVISION
nucleus
nucleolus
ribosomes
rough ER
CELLS WILL HAVE A LARGE NUMBER OF THESE (PANCREAS) and NOT MEMBRANE BOUNDED SO NOT CONSIDERED AN ORGANELLE
ribosomes
rough ER
mitochondria
lysosomes
CAN BE FREE IN CYTOPLASM OR ATTACHED TO ER OR NUCLEAR ENVELOPE
ribosomes
rough ER
smooth ER
lysosomes
FUNCTION IN DIVERSE METABOLIC PROCESSES and SYNTHESIS OF LIPIDS- OILS, STEROIDS, AND NEW CELL MEMBRANES; MAKES SEX HORMONES
smooth ER
rough ER
peroxisomes
l
1. METABOLISM OF CARBS
2. DETOXIFY’S DRUGS AND POISONS, FOUND IN LIVER ELLS
3. STORES CALCIUM IONS; USED IN CONTRACTION OF MUSCLES
smooth ER
rough ER
ribosomes
nuclear enveleope
WAREHOUSE FOR RECEIVING, SORTING, SHIPPING, AND SOME MANUFACTURING and CONSISTS OF SACS CALLED CISTERNAE
Golgi apparatus
Smooth ER
peroxisomes
lysosomes
gets rid of damaged cell parts and damaged ones cause Tay Sachs disease
lysosomes
peroxisomes
smooth ER
nucleolus
It is a sack of enzymes that is used to digest macromolecules and work best in an acidic environment
lysosomes
peroxisomes
cell wall
cytoplasm
Main job is for storage- has contractile, food, and central ones
vacuole
cell wall
golgi apparatus
ribosomes
Gets rid of damaged cell parts and is found in WBC and destroys bacteria and other invaders
lysosomes
ribosomes
rough ER
cytoplasm
has it's own DNA, comes from mom, and is used to make energy
mitochondria
peroxisomes
lysosomes
G
Convert carbon dioxide and water to sugar and oxygen
chloroplast
mitochondria
lysosomes
cell wall
sometimes called plastids, can pinch in two in order to reproduce themselves
chloroplast
ribosomes
rough ER
lysosomes
detoxify alcohol and other harmful compounds by transferring hydrogen from the poisonous compounds to oxygen
peroxisomes
smooth ER
lysosomes
chloroplast
contain enzymes that remove hydrogen atoms from various substrates and transfer them to oxygen = H2O2 ; use oxygen to break fatty acids down for the mitochondria
peroxisomes
rough ER
smooth ER
cytskeleton
These are fibers that extend through out the cytoplasm and isues for support and shape
cytoskeleton
cilia
flagella
cell wall
composed of microtubules, microfilaments, and intermediate filaments and might help some cells move; usually the skeleton part
cytoskeleton
cilia
cell wall
perioxisomes
Sperm cells have these- used for movement. Some bacteria can have one or multiple ones
flagella
cilia
cytoskeleton
cytoplasm
line the oviducts helping move the egg towards the uterus, has power and recovery strokes, and can line the trachea
cilia
flagella
ribosomes
c
Most are composedd of cellulose and are usually found in prokaryotes, protists, and fungus.
cell wall
cell membrane
ribosomes
rough er
Protects, maintains shape, prevents excessive uptake of water
cell wall
cell membrane
vacuole
lysosomes
Is a lipid bilayer, contains a matrix (mixture) of materials, and gives shape and protection
cell membrane
lysosomes
ribosomes
nucleus
This is a perforation (opening) in the cell wall that connects cells by channels. it is filled with cytoplasm and unifies most of the plant into one living continuum.
tight junctions
Forms continuous seal around the cell to prevent leakage and makes our skin cells watertight
tight junctions
plasmodesmata
desomosomes
gap junctions
Function like rivets, make cells into strong sheets.
desomosomes
plasmodesmata
gap junctions
tight junctions
attach muscle cells to each other in a muscle cell and when you tear a muscle, you rupture these
desmosomes
tight junctions
plasmodesmata
gap junctions
Found ONLY IN ANIMAL CELLS, function by connecting cells to adjacent cells by providing cytoplasmic channels; found in heart muscle and animal embryos
gap junctions
desomsomes
tight junctions
plasmodesmata
Having a nucleus indicates that you are
What does it mean to have membrane bound organelles?
What are the three parts of the cell theory?
All cells contain DNA and RNA. All cells have a nucleus. All cells have ribosomes
All cells are identical in structure and function. All cells have a nucleus. All cells are round.
All cells have what in common with each other?
ribosomes
cell wall
celll membrane
cytoplasm
nucleus/nucleoid region
What two organelles were thought to have been bacteria at one point because of the fact they have their own DNA?
