BTEC Applied Science Unit 1 Biology Exam With Correct Answers

BTEC Applied Science Unit 1 Biology
Exam With Correct Answers




What is the name of the process by which cells become specialised for a partictular function from stem cells -
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correct answer differentiation
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Explain what tissues are - correct answer a collection of specialised cells
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Explain what an organ is - correct answer a collection of tissues performing specific physiological functions
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what is the difference between to ribosomes in a prokaryote and a eukaryotic cell - correct answer prokaryotes -
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70s ribosome
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eukaryote - 80s ribosome l l l




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 l l l l l l l




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 l l




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