BTEC Applied Science Unit 1 Biology Exam 2025 With Correct Answers.

BTEC Applied Science Unit 1 Biology
Exam 2025 With Correct Answers




Describe the function of the nucleolus - correct answer Produces ribosomes and RNA
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Describe the function of the cell wall - correct answer Provides rigidity and protection to the cell
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Describe the function of the chloroplasts - correct answer Site of photosynthesis as they contain chlorophyll
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Describe the function of the plasmodesmata - correct answer A channel through the cell wall the allows
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transport of materials from one cell to another
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Describe the function of the amyoplasts - correct answer Stores starch and converts starch back into glucose
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when the plant needs energy
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Describe the function of the vacuole - correct answer Stores water and chemicals for cell use. Also maintains
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turgor of cell
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Describe the function of the tonoplasts - correct answer Membrane the surrounds the vacuole. Protects the
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vacuole, isolates it from harmful substances and controls water flow in and out of the vacuole
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, Why are gram positive bacteria more susceptible to antibiotics? - correct answer Permeable cell wall whereas
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gram negative bacteria has a semi-permeable cell wall
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Describe the adaptations found in a palisade cell - correct answer Closely packed together
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Chloroplasts l




Large vacuole l




Explain why the palisade cell has a large amount of chloroplasts - correct answer To absorb lots of light for
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photosynthesis



Explain why palisade cells are closely packed together - correct answer To form a continuous layer in the leaf
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Explain why palisade cells have a large vacuole - correct answer To maintain turgor (pushes against the cell wall
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to maintain rigid shape)
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Describe the adaptations of a root hair cell - correct answer Root hair shape
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Large vacuole l




Thin cellulose walls
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Explain why root hair cells have an elongated section known as the root hair - correct answer Increased surface
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area for maximum movement of water into the cell
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Explain why root hair cells have a large vacuole - correct answer Contains cell sap with low water potential to
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encourage water into the cell l l l l




Explain why root hair cells have thin cellulose walls - correct answer Encourage movement of water and
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minerals into the cell. Short distance for osmosis and diffusion
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Describe the adaptations of a sperm cell - correct answer Lots of mitochondria
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Shaped head containing acrosome (with enzymes)
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