Cell Biology
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Introduction to Cells
SubtopicIntroduction to Cells under Cell Biology for Grade 11 IB.
Preview questions (no answers)
- 1.
Which of the following is a unicellular organism that can perform all the functions of life?
A.Muscle fiber
B.Fungal hypha
C.Chlamydomonas
D.Virus
- 2.
What happens to the genome during the differentiation of a stem cell into a specialized cell?
A.The genome is completely rewritten
B.Specific genes are activated while others are silenced
C.Half of the chromosomes are discarded
D.The DNA is converted into RNA permanently
- 3.
Which unit is the most appropriate for measuring the thickness of a cell membrane?
A.Millimeters ()
B.Centimeters ()
C.Nanometers ()
D.Meters ()
Download the worksheet for Cell Biology - Introduction to Cells to practice offline. It includes additional chapter-level practice questions.
Ultrastructure of Cells
SubtopicUltrastructure of Cells under Cell Biology for Grade 11 IB.
Preview questions (no answers)
- 1.
Which of the following is true about plasmids in prokaryotic cells?
A.They are the main genomic DNA
B.They are membrane-bound organelles
C.They are small, circular pieces of extra-genomic DNA
D.They are found inside the nucleus
- 2.
What is the primary role of the cytoskeleton in a cell?
A.To store water
B.To produce ATP
C.To maintain cell shape and assist in movement
D.To synthesize proteins
- 3.
Which microscope uses a beam of electrons to scan the surface of a specimen, creating a 3D image?
A.Transmission electron microscope
B.Scanning electron microscope
C.Compound light microscope
D.Phase-contrast microscope
Download the worksheet for Cell Biology - Ultrastructure of Cells to practice offline. It includes additional chapter-level practice questions.
Membrane Structure
SubtopicMembrane Structure under Cell Biology for Grade 11 IB.
Preview questions (no answers)
- 1.
A molecule that has both a water-loving and a water-fearing part is called:
A.Bipolar
B.Amphipathic
C.Ambivalent
D.Hydro-sensitive
- 2.
Which microscope technique allowed scientists to see the bumpy surface of the inner membrane layer?
A.Light microscopy
B.Freeze-fracture electron microscopy
C.Scanning tunneling microscopy
D.Simple magnifying glass
- 3.
What is the effect of having 'kinks' in the phospholipid tails?
A.It allows tails to pack tighter
B.It makes the membrane more rigid
C.It prevents close packing, increasing fluidity
D.It makes the membrane thicker
Download the worksheet for Cell Biology - Membrane Structure to practice offline. It includes additional chapter-level practice questions.
Membrane Transport
SubtopicMembrane Transport under Cell Biology for Grade 11 IB.
Preview questions (no answers)
- 1.
Which term describes the movement of a substance from an area of low concentration to an area of high concentration?
A.Diffusion
B.Against the concentration gradient
C.Down the concentration gradient
D.Osmosis
- 2.
Which transport process is most likely involved in the secretion of digestive enzymes by pancreas cells?
A.Simple diffusion
B.Exocytosis
C.Osmosis
D.Endocytosis
- 3.
Why is the decrease in surface area to volume ratio a problem for a growing cell?
A.It makes the cell too heavy
B.It makes transport of materials into the cell less efficient
C.It increases the energy produced by the cell
D.It prevents the cell from ever dividing
Download the worksheet for Cell Biology - Membrane Transport to practice offline. It includes additional chapter-level practice questions.
The Origin of Cells
SubtopicThe Origin of Cells under Cell Biology for Grade 11 IB.
Preview questions (no answers)
- 1.
What did Oparin and Haldane suggest about the early Earth's atmosphere?
A.It was rich in oxygen and very stable
B.It was a reducing environment that could form organic compounds
C.It was devoid of any gases
D.It was exactly the same as it is today
- 2.
Which of the following is NOT a requirement for the first cell to emerge from non-living material?
A.Self-replication of molecules
B.Development of a nucleus
C.Catalysis of chemical reactions
D.Assembly of organic molecules into polymers
- 3.
Which gas was used in the Miller-Urey experiment to provide nitrogen?
A.Nitrogen gas ()
B.Ammonia ()
C.Nitric acid
D.Nitrate
Download the worksheet for Cell Biology - The Origin of Cells to practice offline. It includes additional chapter-level practice questions.
Preview questions (no answers)
- 1.
What is the status of the chromosomes when they reach the poles in telophase?
A.They begin to uncoil
B.They continue to shorten
C.They replicate immediately
D.They are ejected from the cell
- 2.
What is the role of mitosis in tissue repair?
A.To produce more white blood cells to fight infection
B.To replace damaged or dead cells with new identical cells
C.To change the DNA of the damaged cells
D.To shrink the wound through muscle contraction
- 3.
What happens to the spindle fibers at the end of mitosis during telophase?
A.They are used to build the cell wall
B.They break down and disappear
C.They replicate for the next division
D.They pull the nucleus to the side of the cell
Download the worksheet for Cell Biology - Cell Division to practice offline. It includes additional chapter-level practice questions.