1) A human cheek cell and a spongy mesophyll cell from a leaf are examined under a microscope. Which structures are seen in both cells? a) cell membrane, nucleus and cytoplasm b) cell wall, cell membrane and nucleus c) cytoplasm, cell wall and cell membrane d) nucleus, cytoplasm and cell wall 2) Which structures are present in a root hair cell? [Key (✓ = Present and ✗ = Absent)] a) Nucleus = ✓ | Chloroplast = ✓  b) Nucleus = ✓ | Chloroplast = ✗  c) Nucleus = ✗ | Chloroplast = ✓  d) Nucleus = ✗ | Chloroplast =✗ 3) Which two structures are found in all plant epidermal cells? a) cell wall and chloroplasts b) cell wall and nucleus c) chloroplasts and starch grains d) nucleus and starch grains 4) Which processes can only occur through a membrane? [Key (✓ = Yes and ✗ = No)] a) active transport = ✓ | diffusion = ✓ | osmosis = ✓  b) active transport = ✓ | diffusion = ✓ | osmosis = ✗ c) active transport = ✓ | diffusion = ✗ | osmosis = ✓ d) active transport = ✗ | diffusion = ✓ | osmosis = ✓ 5) How do plants absorb nitrate ions by active transport? a) against a concentration gradient using energy b) against a concentration gradient without using energy c) down a concentration gradient using energy d) down a concentration gradient without using energy 6) Which statement is always correct when oxygen is diffusing out of a plant cell? a) The concentration of carbon dioxide is higher inside the cell than outside. b) The concentration of carbon dioxide is higher outside the cell than inside. c) The concentration of oxygen is higher inside the cell than outside. d) The concentration of oxygen is higher outside the cell than inside 7) What is an example of active transport? a) movement of glucose molecules into the cells of the villi b) movement of glucose molecules down a concentration gradient c) movement of ions in blood plasma d) movement of water in the transpiration stream 8) Which part of a absorbs and Uses Corban Dioxide from the air? a) Cuticle b) mesophyll c) Phloem d) xylem 9) What is the effect of a lack of nitrate ions on plant leaves? a) all leaves are very dark green b) leaves lose their yellow colour c) the leaves wilt d) young leaves grow very slowly 10) Which word equation photosynthesis? a) Carbohydrates + Carbon dioxide → Oxygen + Water  b) Carbohydrates + Oxygen → Carbon dioxide + Water c) Carbon dioxide + Water→ Carbohydrates + Oxygen d) Oxygen + Water → Carbohydrates + Carbon dioxide 11) If a condition is a limiting factor for photosynthesis, what does this mean? a) Changing the condition may either increase or decrease the rate of photosynthesis. b) Changing the condition will only increase the rate of photosynthesis. c) Changing the condition will only decrease the rate of photosynthesis. d) Changing the condition will not affect the rate of photosynthesis 12) Magnesium is an essential element for a) the formation of cell walls. b) the formation of chlorophyll. c) the formation of proteins. d) the process of cell division. 13) Which signs show that a plant has been grown in a culture solution deficient in magnesium? a) purple leaves and poor root growth b) small leaves and thin stem c) white upper leaves and normal lower leaves d) yellow stem and yellow leaves 14) What describes the upper cuticle of a leaf? a) a single layer of cells containing many chloroplasts b) a single layer of transparent cells allowing light to enter the leaf c) a thin non-cellular layer preventing water loss from the leaf d) a permeable layer allowing water to enter the leaf 15) Which two features are found in animal cell? a) Cell membrane | Nuecleus b) Starch grains | Chloroplasts c) Chloroplasts | Nuecleus d) Cell membrane | Starch grains 16) Which elements do carbohydrates contain? a) carbon, hydrogen and oxygen  b) carbon, hydrogen and sulphur  c) carbon, nitrogen and oxygen  d) carbon, nitrogen and sulphur 17) Which simple molecules are the basic units of protein? a) amino acids  b) fatty acids  c) sugars  d) vitamins 18) Which nutrient produces a purple colour when mixed with biuret solution? a) fat  b) protein  c) reducing sugar  d) starch 19) When a substance is added to meat, amino acids are produced. What is this substance? a) a hormone  b) an enzyme  c) an oil  d) water e)   20) Which food is the richest source of the vitamin or mineral ions essential for the transport of oxygen by the blood? a) beans  b) egg  c) fish  d) fruit

Biology [Chapter 1 to 5] MCQs

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