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IB Biology Practice Exam Questions with answers
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IB Biology Practice Exam Questions with answers
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IB Biology Practice Exam Questionswith answers
What are the three main parts of the cell theory? What are some possible exceptions?
Practice Question - .......🔷ANSWERS🔶......✔✔ 1. All living things are composed of cells.
2. Cells are the smallest unit of life
3. Cells come from pre-existing cells
Exceptions: Viruses: living or not? and amoeba
What are the basic functions of life? What organisms carry out these functions?
- .......🔷ANSWERS🔶......✔✔ Metabolism, response, homeostasis, growth, reproduction and
nutrition.
Unicellular organisms
What are the relative sizes of:
1. Molecules
2. Membranes
3. Viruses
4. Bacteria
5. Organelles
6. Cells - .......🔷ANSWERS🔶......✔✔ 1. 1 nanometer
2. 10 nanometers
3. 100 nanometers
4. 1 um
4. 10 um
, 5. 100 um
What are the formulas for:
1. Magnification
2. Actual size - .......🔷ANSWERS🔶......✔✔ 1. Magnification=measured length/scale bar label
2. Actual size=measured length/magnification
Why is important to have a large surface area to volume ratio? Name some places where this
happens.
Practice Question
Practice Question: Alveoli - .......🔷ANSWERS🔶......✔✔ Everything can be exchanged quickly and
efficiently when this takes place. Osmosis or diffusion of different products is faster. This takes place
in the: intestines, alveoli (the roots are long and branched and they maximize surface area for water
uptake, which is good for gas exchange), brain, and kidneys
What are emergent properties? - .......🔷ANSWERS🔶......✔✔ Properties that together function as
one, but individually don't do much. (organelles in cells)
Why are stem cells important, and where can you find them?
Practice Question - .......🔷ANSWERS🔶......✔✔ Stem cells are pluripotent and can become anything
you want them to be. They are found in the bone marrow, embryo and umbilical cord. They can treat
lymphoma.
What are the structures and functions of a prokaryotic cell, and what do they look like? (Study the
picture) - .......🔷ANSWERS🔶......✔✔ Flagellum: Movement
Ribosomes: Protein synthesis
Pilli: Attachment, DNA transfer
Cell wall: Protective coating, gram-positive or negative
Cytoplasm: Contains enzymes for metabolism
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