National 5 Biology - Unit 1 End of Unit Test
What word is used to describe a plant cell when it is placed in a solution of lower water concentration.
️️Plasmolysed
What do you call a plant cell that has been placed in a solution of higher water concentration?
️️Turgid
What happens...
What word is used to describe a plant cell when it is placed in a solution of lower water concentration.
✔️✔️Plasmolysed
What do you call a plant cell that has been placed in a solution of higher water concentration?
✔️✔️Turgid
What happens to an animal cell when it is placed in a solution of higher water concentration?
✔️✔️Burst - because they have no cell wall to maintain the structure.
What kind of solution makes an animal cell shrink? ✔️✔️A lower water concentration.
What kinds of transport moves substances against their concentration gradient and requires energy?
✔️✔️Active transport.
As well as energy, what else does active transport require? ✔️✔️Membrane proteins
Visking tubing is often described as a model cell. Why? ✔️✔️It has a semi-permeable membrane
When investigating osmosis in potato cylinders, what must you do to them before you re-weigh them?
✔️✔️blot them dry to remove excess water
Describe the structure of DNA ✔️✔️Double-stranded helix held by complementary base pairs.
What is DNA made from? ✔️✔️A sequence of bases - A, T, C, G
What are the base pairing rules in DNA? ✔️✔️Adenine-Thymine, Guanine - Cytosine
Name five parts of an animal cell? ✔️✔️Nucleus, cytoplasm, cell membrane, ribosomes, mitochondria
, Name three structures found in plant cells but not in animal cells? ✔️✔️Chloroplast, Cell wall, Vacuole
What type of cell(s) contain plasmids? ✔️✔️Bacteria
Name the part of the cell that controls the activities of the cell? ✔️✔️Nucleus
What important substances are made by ribosomes? ✔️✔️Proteins
What controls the entry and exit of materials in a cell? ✔️✔️Cell membrane
What is the function of the cytoplasm? ✔️✔️Site of chemical reactions
What is the site of aerobic respiration (a chemical reaction which releases energy from food) in a cell?
✔️✔️Mitochondria
Which types of cell(s) have a cell wall? ✔️✔️Plants, Fungal and Bacterial
Where do you call the fluid-filled sac containing water, sugars and salts which is found in a plant or
fungal cell? ✔️✔️Vacuole
What chemical reaction takes place inside a chloroplast uisng energy from the sun?
✔️✔️Photosynthesis
Name the pigment found in chloroplasts which trap light energy from the sun? ✔️✔️Chlorophyll
What is a plant cell wall composed of? ✔️✔️Cellulose
Are plant and bacterial cell walls made of cellulose? ✔️✔️No - only plant
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