BIO 202-BIOLOGY:CELLBIOLOGY:KEY TERMS
QUESTIONS AND CORRECT ANSWERS GRADED
A+ [UPDATED 2025]
1. Surface area to volume ratio
a way of comparing the surface area of an organism to its volume – the
smaller this ratio, the harder it is to exchange substances with the
environment at a fast enough rate
2. Osmosis
the movement of water, through a partially permeable membrane, into a
solution with a lower water concentration
3. Sub-cellular structures
structures found in cells that include the nucleus, mitochondria, chloroplasts
and ribosomes
4. Nucleus
the control centre of the cell
5. Cytoplasm
the substance found in living cells (outside the nucleus), where chemical
reactions take place
, 6. Cell membrane
a layer that holds the cytoplasm in a cell and controls what enters and leaves
the cell
7. Mitochondria
the structures in the cytoplasm where energy is produced from chemical
reactions
8. Ribosomes
small structures found in the cytoplasm of living cells where protein
synthesis takes place
9. Cell wall
a protective layer, found outside the cell membrane of plant, fungal and
bacterial cells, that helps to support the cell
10.Cellulose
a carbohydrate that makes up the cell wall of plants
11.Vacuole
a fluid-filled cavity in a cell that is used for storage and support
QUESTIONS AND CORRECT ANSWERS GRADED
A+ [UPDATED 2025]
1. Surface area to volume ratio
a way of comparing the surface area of an organism to its volume – the
smaller this ratio, the harder it is to exchange substances with the
environment at a fast enough rate
2. Osmosis
the movement of water, through a partially permeable membrane, into a
solution with a lower water concentration
3. Sub-cellular structures
structures found in cells that include the nucleus, mitochondria, chloroplasts
and ribosomes
4. Nucleus
the control centre of the cell
5. Cytoplasm
the substance found in living cells (outside the nucleus), where chemical
reactions take place
, 6. Cell membrane
a layer that holds the cytoplasm in a cell and controls what enters and leaves
the cell
7. Mitochondria
the structures in the cytoplasm where energy is produced from chemical
reactions
8. Ribosomes
small structures found in the cytoplasm of living cells where protein
synthesis takes place
9. Cell wall
a protective layer, found outside the cell membrane of plant, fungal and
bacterial cells, that helps to support the cell
10.Cellulose
a carbohydrate that makes up the cell wall of plants
11.Vacuole
a fluid-filled cavity in a cell that is used for storage and support
