Photosynthesis

Which two substances are the products of photosynthesis?

• carbon dioxide and glucose

• carbon dioxide and water

• oxygen and carbon dioxide

• oxygen and glucose

Plants manufacture their own supplies of carbohydrate. What are the raw materials of this process?

• carbon dioxide and chlorophyll

• carbon dioxide and water

• oxygen and chlorophyll

• oxygen and water

The diagram shows a cross-section of part of a leaf. Which type of cell is found in layer X?

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What is formed first in a leaf as a result of photosynthesis?

• chlorophyll

• glucose

• starch

• water

Which product of photosynthesis moves out of a green leaf through its stomata?

• carbon dioxide

• glucose

• oxygen

• water

The diagram shows the apparatus used in an investigation to measure the rate of oxygen production during photosynthesis.

The investigation was repeated several times and the average amount of gas collected was calculated. Which two factors must be kept constant during this investigation?

• the amount of water in the beaker and the height of the measuring cylinder

• the size of aquatic plant and the amount of gas in the measuring cylinder

• the size of aquatic plant and the duration of exposure to light

• the size of the beaker and the funnel

Which element is found in a molecule of chlorophyll?

• calcium

• iron

• lead

• magnesium

Which cell type contains the most chloroplasts?

• palisade mesophyll

• phloem

• spongy mesophyll

• xylem

Four test-tubes are set up as shown in the diagram and left in full sunlight. After several hours, which test-tube contains the most dissolved oxygen?

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Which substances are transported in the phloem?

• amino acids and starch

• amino acids and sucrose

• protein and starch

• starch and sucrose