Organisation of the Organism
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Cell structure and organisation
SubtopicCell structure and organisation under Organisation of the Organism for Grade 12 IGCSE.
Preview questions (no answers)
- 1.
Which organelle translates genetic code into polypeptide chains?
A.Ribosome
B.Golgi body
C.Nucleus
D.Vacuole
- 2.
What is the function of the acrosome in the head of a sperm cell?
A.To produce energy for swimming
B.To store the genetic material
C.To digest the outer layers of the egg cell
D.To push the cell forward
- 3.
Which of these is a prokaryote?
A.Bacterium
B.Amoeba
C.Yeast
D.Onion cell
- 4.
What are the basic units of life that make up all living organisms?
A.Atoms
B.Tissues
C.Cells
D.Organs
- 5.
Which of the following is an example of an organ?
A.Blood
B.The heart
C.A nerve cell
D.The respiratory system
- 6.
Red blood cells lack a nucleus when mature. What is the primary advantage of this?
A.It allows the cell to divide more quickly.
B.It provides more space for the transport of hemoglobin.
C.It prevents the cell from being infected by viruses.
D.It allows the cell to use less oxygen for itself.
- 7.
What is the primary function of the vesicles produced by the Golgi apparatus?
A.To perform aerobic respiration
B.To transport proteins to the cell membrane for secretion
C.To provide structural support to the cell
D.To act as the site of translation
- 8.
Which of the following structures is found in the cells of fungi but not in the cells of animals?
A.Glycogen granules
B.Mitochondria
C.Cell wall made of chitin
D.Nucleus
- 9.
In the hierarchy of biological organization, which of the following is the correct order from simplest to most complex?
A.Tissue -> Organ -> Organ system -> Cell
B.Cell -> Organ -> Tissue -> Organ system
C.Cell -> Tissue -> Organ -> Organ system
D.Organ system -> Organ -> Tissue -> Cell
- 10.
Which of the following is a characteristic of a eukaryotic cell but NOT a prokaryotic cell?
A.Presence of a cell wall
B.Presence of a cell membrane
C.Presence of membrane-bound organelles
D.Presence of genetic material
Download the worksheet for Organisation of the Organism - Cell structure and organisation to practice offline. It includes additional chapter-level practice questions.
Levels of organisation
SubtopicLevels of organisation under Organisation of the Organism for Grade 12 IGCSE.
Preview questions (no answers)
- 1.
Which level of organization consists of sieve tubes and companion cells in plants?
A.Organ
B.Tissue
C.Cell
D.Organism
- 2.
A dandelion plant is an example of which level of organization?
A.Tissue
B.Organ
C.Organ system
D.Organism
- 3.
The trachea is part of the respiratory system. What level of organization is the trachea?
A.Organ
B.Tissue
C.Cell
D.Organism
- 4.
A guard cell in a leaf belongs to which level of organization?
A.Cell
B.Tissue
C.Organ
D.Organ system
- 5.
In terms of biological organization, how does a colonial organism (like Volvox) differ from a true multicellular organism?
A.Colonial organisms lack DNA.
B.Colonial organisms have no specialized tissues or organs.
C.Multicellular organisms are always larger.
D.Multicellular organisms do not have cells working together.
- 6.
Which of the following describes the level of organization of a seed?
A.It is a specialized cell.
B.It is a plant tissue.
C.It is an organ containing an embryo and food stores.
D.It is an organ system.
- 7.
What level of organization is represented by a group of similar cells, such as ciliated cells in the trachea, working together to move mucus?
A.Organ
B.Organ system
C.Tissue
D.Organism
- 8.
In biological terms, what is the 'organism' in a lichen?
A.The fungus
B.The alga
C.The symbiotic association of both
D.The reproductive spores
- 9.
Which of the following options correctly lists components of the 'Integumentary System'?
A.Skin, Hair, Sweat Glands
B.Skin, Muscles, Bones
C.Epidermis, Dermis, Subcutaneous Fat
D.Keratin, Collagen, Elastin
- 10.
Considering the human eye, what level of organisation do the 'retina, iris, and cornea' collectively form?
A.An organ system
B.An organ
C.A tissue
D.A complex cell layer
Download the worksheet for Organisation of the Organism - Levels of organisation to practice offline. It includes additional chapter-level practice questions.
Size of specimens (Magnification)
SubtopicSize of specimens (Magnification) under Organisation of the Organism for Grade 12 IGCSE.
Preview questions (no answers)
- 1.
What is the actual size of a specimen if its image is long and the magnification is ?
A.B.C.D. - 2.
If a nucleus measures and its image measures , what is the magnification?
A.B.C.D. - 3.
When converting from micrometers () to nanometers (), the value should be multiplied by which factor?
A.B.C.D. - 4.
A student measures the image of a cell to be . If the magnification is , what is the actual size of the cell?
A.B.C.D. - 5.
An image of a mosquito larva is long. The actual larva is long. What magnification was used?
A.B.C.D. - 6.
A scale bar labeled is measured and found to be long. What is the magnification of the image?
A.B.C.D. - 7.
An image of a cell is in diameter. The actual diameter of the cell is . Calculate the magnification.
A.B.C.D. - 8.
A scale bar representing is long. What is the magnification of this electron micrograph?
A.B.C.D. - 9.
An image of a nucleus is wide. If the magnification is , what is the actual width in micrometers ()?
A.B.C.D. - 10.
A scale bar is long and represents . What is the magnification?
A.B.C.D.
Download the worksheet for Organisation of the Organism - Size of specimens (Magnification) to practice offline. It includes additional chapter-level practice questions.