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BTEC Applied Science Unit 1 Biology Exam
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BTEC Applied Science Unit 1 Biology Exam ...
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BTEC Applied Science Unit 1 Biology Exam 2024-2025Describing what the nucleolus does. Answer Ribosomes and RNA are produced.
Describing what the cell wall does. Answer Provides rigidity and protection to the cell
Describing what the chloroplasts do. Answer Site of photosynthesis because they
contain chlorophyll
Describing what the plasmodesmata do. Answer A channel through the cell wall that
allows transport of materials from one cell to another
Explain what the amyoplasts do. -Answer Stores starch and, when the plant needs
energy, it converts the starch back into glucose.
Explain what the vacuole does. -Answer Stores water and chemicals for cell use. Also
maintains turgor of cell.
Describe the role of the tonoplasts - Answer Membrane the surrounds the vacuole.
Protects the vacuole, isolates it from harmful substances and controls water flow in and
out of the vacuole
Why are gram positive bacteria more sensitive to antibiotics? - Answer Permeable cell
wall whereas gram negative bacteria has a semi-permeable cell wall
Describe the adaptations found in a palisade cell - Answer Closely packed together
Chloroplasts
Large vacuole
, Explain why the palisade cell would contain a high amount of chloroplasts - Answer To
absorb a lot of light for photosynthetic activity
Explain why palisade cells are packed closely together - Answer Because they have to
create a continuous layer in the leaf
Explain why palisade cells have a large vacuole - Answer Because they have to maintain
turgor-to push against the cell wall, maintain its rigid shape
Describe the following adaptations of a root hair cell shape of root hair large vacuole
thin cellulose walls
Explain why root hair cells have an extended region called the root hair Because this
increases the surface area to allow maximum water movement into the cell.
Explain why root hair cells have a large vacuole It contains cell sap with a low water
potential to attract water into the cell.
Explain why root hair cells have thin cellulose walls - Answer Encourage the movement
of water and minerals into the cell. Short distance for osmosis and diffusion
Describe the adaptations of a sperm cell - Answer Loads of mitochondria
Shaped head containing acrosome with enzymes
Haploid nucleus
Tail for movement
Explain why a sperm cell has an undulipodium tail - Answer To enable the sperm to move
to the egg
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