Cells and Life Processes
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Preview questions (no answers)
- 1.
Which scientist's contribution to the cell theory was most related to the origin of new cells?
A.Schleiden
B.Schwann
C.Virchow
D.Hooke
- 2.
What does 'MRS GREN' help students remember?
A.The names of famous scientists
B.The parts of a microscope
C.The seven life processes of living things
D.The steps of the cell theory
- 3.
Which of these is the correct order of organization from simplest to most complex?
A.Organ -> Tissue -> Cell
B.Cell -> Tissue -> Organ
C.Tissue -> Organ -> Cell
D.Organ -> Cell -> Tissue
- 4.
A scientist finds a new object. To prove it is living using the cell theory, what should they look for under a microscope?
A.If it is shiny
B.If it is made of cells
C.If it can dissolve in water
D.If it is hard like a rock
- 5.
Which of these diagrams correctly shows the relationship between a parent cell and its offspring in asexual reproduction?
A.A
B.B
C.C
D.D
- 6.
What is the actual size of a cell if its image is and the magnification is ?
A.B.C.D. - 7.
Which process involves the division of the cytoplasm to create two separate cells?
A.Homeostasis
B.Cytokinesis
C.Photosynthesis
D.Excretion
- 8.
Why do eukaryotic cells generally have a lower ratio than prokaryotic cells, and how do they compensate for this?
A.They are smaller, so they don't need to compensate.
B.They are larger, and they compensate by using internal membranes and organelles to compartmentalize functions.
C.They are larger, and they compensate by having a cell wall that speeds up diffusion.
D.They are smaller, and they compensate by having more DNA.
- 9.
If you observe a cell under a microscope and see that it is currently undergoing division into two identical daughter cells, which function of life are you primarily witnessing?
A.Metabolism
B.Growth
C.Reproduction
D.Excretion
- 10.
How does the structure of a red blood cell represent a specialization that benefits its function in the human body?
A.It has a large nucleus to store more genetic information.
B.It lacks a nucleus and has a biconcave shape to maximize surface area for oxygen transport.
C.It has many mitochondria to provide energy for swimming through veins.
D.It has a thick cell wall to withstand high blood pressure.
Download the worksheet for Cells and Life Processes - Cell Theory to practice offline. It includes additional chapter-level practice questions.
Microscopy Skills
SubtopicMicroscopy Skills under Cells and Life Processes for Grade 7 IB.
Preview questions (no answers)
- 1.
How many lenses does a 'compound' light microscope use to magnify an image at one time?
A.One
B.Two
C.Four
D.Eight
- 2.
Why should you never use the coarse adjustment knob with the high-power objective?
A.It will blur the image
B.The lens is very long and might crush the slide
C.The light will become too dim
D.The nosepiece will stop rotating
- 3.
What is the total magnification if the eyepiece is and the objective lens is ?
A.B.C.D. - 4.
The 'arm' of the microscope is used for:
A.Holding the objective lenses
B.Supporting the body tube and providing a handle for carrying
C.Controlling the amount of light
D.Placing the slide
- 5.
If you are using a objective and a ocular, and you see an organism that occupies half of the field of view, how large is the organism?
A.B.C.D. - 6.
Which of the following is the correct order for focusing a microscope on a new slide?
A.High power Fine focus Low power Coarse focus
B.Low power Coarse focus Fine focus High power
C.Medium power Fine focus High power Coarse focus
D.Coarse focus High power Fine focus Low power
- 7.
What does the term 'magnification' refer to?
A.The clarity of the image.
B.The increase in the apparent size of an object.
C.The distance between the lens and the object.
D.The color intensity of the specimen.
- 8.
A student views a square grid under a microscope. At , they see squares. Approximately how many squares will they see if they switch to magnification?
A.B.C.D. - 9.
If a student uses a ocular and a objective, what is the total magnification, and how does the image appear compared to the specimen?
A.; inverted and enlarged.
B.; upright and enlarged.
C.; upright and enlarged.
D.; inverted and enlarged.
- 10.
A drawing of a cell is long. The actual cell is long. Calculate the magnification.
A.B.C.D.
Download the worksheet for Cells and Life Processes - Microscopy Skills to practice offline. It includes additional chapter-level practice questions.
Plant vs. Animal Cells
SubtopicPlant vs. Animal Cells under Cells and Life Processes for Grade 7 IB.
Preview questions (no answers)
- 1.
Which of these would be found in a cheek cell (animal) but not in a bacterial cell?
A.Cell membrane
B.A nucleus
C.DNA
D.Cytoplasm
- 2.
In the levels of organization, which level is the human heart?
A.Cell
B.Tissue
C.Organ
D.Organism
- 3.
Which organelle is responsible for maintaining the turgor pressure (stiffness) in a plant cell?
A.Large central vacuole
B.Nucleus
C.Ribosome
D.Golgi apparatus
- 4.
What is the primary purpose of the cytoplasm?
A.To store water
B.To provide a medium for chemical reactions
C.To protect the cell from bacteria
D.To make food using sunlight
- 5.
What happens to the surface area to volume ratio as a cell grows larger?
A.It increases, making the cell more efficient
B.It decreases, making it harder for the cell to exchange materials
C.It stays the same regardless of cell size
D.It fluctuates based on the number of mitochondria
- 6.
Which of these is a correct pairing of an organelle and its function?
A.Vacuole - Protein synthesis
B.Chloroplast - Cellular respiration
C.Nucleus - Genetic control center
D.Cell wall - Selective permeability
- 7.
A cell has a nucleus, a cell wall, and mitochondria, but no chloroplasts. Which of the following could it be?
A.A muscle cell
B.A root hair cell
C.A leaf palisade cell
D.A red blood cell
- 8.
If you are looking at a cell that has a very high rate of protein synthesis, which of the following would you expect to see in large quantities?
A.Lipids in the smooth ER
B.Ribosomes and Rough ER
C.Chlorophyll in the chloroplasts
D.Water in the vacuole
- 9.
Which organelle is found in plant cells but NOT in animal cells?
A.Mitochondria
B.Large Central Vacuole
C.Golgi Apparatus
D.Ribosomes
- 10.
Which of the following contains digestive enzymes and is responsible for breaking down cellular waste in animal cells?
A.Golgi Apparatus
B.Lysosome
C.Ribosome
D.Chloroplast
Download the worksheet for Cells and Life Processes - Plant vs. Animal Cells to practice offline. It includes additional chapter-level practice questions.
Organelles and Functions
SubtopicOrganelles and Functions under Cells and Life Processes for Grade 7 IB.
Preview questions (no answers)
- 1.
Which part of the cell provides a framework to help the cell maintain its shape, similar to a skeleton?
A.Cytoskeleton
B.Cell wall
C.Mitochondria
D.Nucleus
- 2.
Which of the following represents the correct sequence from simplest to most complex?
A.Organ Tissue Cell
B.Cell Tissue Organ
C.Tissue Cell Organ
D.Organ Cell Tissue
- 3.
Which organelle is responsible for the 'Rough' appearance of the Rough Endoplasmic Reticulum?
A.Mitochondria
B.Lysosomes
C.Ribosomes
D.Vacuoles
- 4.
What happens to the field of view when you increase the magnification on a microscope?
A.It gets larger
B.It gets smaller
C.It stays the same
D.It becomes brighter
- 5.
In multicellular organisms, cells often become specialized. What is the main advantage of cell specialization?
A.It allows the organism to grow much larger without needing food.
B.It allows different cells to perform specific tasks more efficiently.
C.It ensures that every cell can perform every function of the body.
D.It prevents the cells from ever dying.
- 6.
What is the best definition of an 'organelle'?
A.A group of cells working together.
B.A specialized structure within a cell that performs a specific function.
C.A type of tissue found in plants.
D.The liquid that fills the inside of a cell.
- 7.
Muscle cells require significant amounts of ATP to contract. Which organelle would be found in higher numbers in heart muscle compared to skin cells?
A.Vacuoles
B.Mitochondria
C.Chloroplasts
D.Lysosomes
- 8.
What is the primary difference between 'free' ribosomes and 'bound' ribosomes?
A.Free ribosomes produce proteins for use inside the cytosol; bound ribosomes produce proteins for insertion into membranes or secretion.
B.Free ribosomes are found in prokaryotes; bound ribosomes are found in eukaryotes.
C.Free ribosomes are larger than bound ribosomes.
D.Bound ribosomes synthesize DNA, while free ribosomes synthesize RNA.
- 9.
In a leaf cell, where would you find the highest concentration of the enzyme Rubisco, which is used to 'fix' carbon during photosynthesis?
A.In the thylakoid space.
B.In the stroma of the chloroplast.
C.Inside the central vacuole.
D.On the Rough Endoplasmic Reticulum.
- 10.
Which of the following organelles is essentially a 'bag of hydrolytic enzymes' used for intracellular digestion?
A.Vacuole
B.Lysosome
C.Ribosome
D.Golgi apparatus
Download the worksheet for Cells and Life Processes - Organelles and Functions to practice offline. It includes additional chapter-level practice questions.
Specialized Cells
SubtopicSpecialized Cells under Cells and Life Processes for Grade 7 IB.
Preview questions (no answers)
- 1.
What is the main function of the tail on a sperm cell?
A.To carry DNA
B.To provide energy
C.To propel the cell towards the egg
D.To protect the head
- 2.
Which cell is specialized for moving the heart to pump blood?
A.Skeletal muscle cell
B.Smooth muscle cell
C.Cardiac muscle cell
D.Nerve cell
- 3.
Which specialized plant cell is long and cylindrical, standing upright like a column to capture sunlight?
A.Guard cell
B.Palisade cell
C.Root hair cell
D.Epidermal cell
- 4.
Which of these specialized cells is found in the blood and helps the blood to clot?
A.Red blood cell
B.White blood cell
C.Platelets
D.Nerve cell
- 5.
What happens to a guard cell when the plant is dehydrated?
A.It becomes turgid and the stoma opens
B.It becomes flaccid and the stoma closes
C.It divides to create more stomata
D.It turns into a palisade cell
- 6.
The structure of a root hair cell includes a very large permanent vacuole. How does this vacuole help with its function?
A.It stores the glucose produced by the roots
B.It speeds up the movement of water by osmosis
C.It keeps the cell from being crushed by the soil
D.It contains enzymes to digest soil particles
- 7.
Cone cells in the eye are specialized to detect different colors of light. Which colors are they typically most sensitive to?
A.Red, Green, and Blue
B.Yellow, Orange, and Purple
C.Black and White
D.Infrared and Ultraviolet
- 8.
In humans, the specialized 'Dust Cells' (alveolar macrophages) are found in the air sacs of the lungs. What is their primary function based on their name?
A.To produce the mucus that lines the lungs.
B.To engulf and digest inhaled particles and pathogens that reach the alveoli.
C.To exchange carbon dioxide for oxygen.
D.To provide structural support to the thin alveolar walls.
- 9.
A 'meristematic cell' in a plant is an unspecialized cell that can divide to produce new cells. How does its structure usually differ from a specialized cell like a palisade cell?
A.It has a much thicker cell wall to protect the DNA.
B.It is usually smaller, has a thin cell wall, and lacks a large central vacuole.
C.It has more chloroplasts to provide energy for division.
D.It lacks a nucleus because it is constantly dividing.
- 10.
Which of these specialized cells would contain the highest concentration of associated with the production of hemoglobin?
A.A mature red blood cell in the circulatory system.
B.A developing red blood cell in the bone marrow.
C.A white blood cell in a lymph node.
D.A muscle cell in the heart.
Download the worksheet for Cells and Life Processes - Specialized Cells to practice offline. It includes additional chapter-level practice questions.
Levels of Biological Organization
SubtopicLevels of Biological Organization under Cells and Life Processes for Grade 7 IB.
Preview questions (no answers)
- 1.
What is the basic hierarchy of life from least complex to most complex?
A.Cell, Tissue, Organ, Organ System, Organism
B.Organism, Organ System, Organ, Tissue, Cell
C.Cell, Organ, Tissue, Organ System, Organism
D.Tissue, Cell, Organ, Organ System, Organism
- 2.
Which level of organization is the 'Excretory System'?
A.Organ
B.Organ system
C.Tissue
D.Organism
- 3.
A single red blood cell is at which level of organization?
A.Organ
B.Tissue
C.Cell
D.Organism
- 4.
Which level of organization is more complex than a cell?
A.Tissue
B.Organelle
C.Atom
D.Molecule
- 5.
In the hierarchy of life, what is the level between Organ and Organism?
A.Cell
B.Tissue
C.Organ System
D.Population
- 6.
Which of these is NOT a level of organization found in a typical multicellular animal?
A.Tissue
B.Organ
C.Chloroplast
D.Cell
- 7.
A Venus Flytrap captures an insect. The trap itself is a modified leaf. What level of organization is the trap?
A.Organism
B.Organ
C.Tissue
D.Cell
- 8.
How does the 'hierarchy of biological organization' reflect the evolutionary principle of complexity?
A.It shows that all life started as organ systems and became cells.
B.It demonstrates how simple units can be integrated into increasingly complex structures with specialized functions.
C.It proves that unicellular organisms are more advanced than humans.
D.It shows that the number of cells in an organism never changes.
- 9.
Consider the role of 'Connective Tissue'. If this tissue were removed from the human body, which of the following 'organ level' problems would occur?
A.Organs like the liver and kidneys would lose their shape and structural support.
B.The brain would stop sending electrical impulses.
C.The skin would stop being able to sense heat.
D.The stomach would stop producing digestive enzymes.
- 10.
Why do large multicellular organisms require an 'organ system' for transport (like circulatory or vascular systems) instead of relying on diffusion at the 'cell' level?
A.Diffusion is too slow to move materials over the large distances found in multicellular bodies.
B.Diffusion only works in plants, not animals.
C.Cells in multicellular organisms do not have membranes.
D.Organ systems are needed to create the atoms that cells use.
Download the worksheet for Cells and Life Processes - Levels of Biological Organization to practice offline. It includes additional chapter-level practice questions.