Cambridge Checkpoint Science 9: Plants

Photosynthesis is a chemical reaction, in the presence of sunlight. What are the reactants?

• carbon dioxide and oxygen

• carbon dioxide and water

• oxygen and water

• water and glucose

• glucose and oxygen

Photosynthesis is a chemical reaction, in the presence of sunlight. What are the products?

• carbon dioxide and oxygen

• carbon dioxide and water

• oxygen and water

• water and glucose

• glucose and oxygen

Choose all that are correct:

Starch is .....

• a particular type of glucose molecule

• thousands of glucose molecules linked together

• soluble in water

• insoluble in water

• found in the chloroplasts of cells

To test if starch is present in a leaf, we use

• the "taste test"

• iodine solution after heating the leaf in ethanol

• ethanol, after soaking the leaf in iodine

• "Benedict's Solution"

• pH solution

Magnesium is a mineral salt that is commonly added to fertiliser, so plants can

• make chlorophyll

• strong cell walls

• develop stronger root system

• make protein

"NPK" fertiliser always contain the following mineral salts:

• nitrogen, phosphorous, calcium

• nitrogen, phosphorous, magnesium

• nitrate, phosphate, potassium

• nitrate, phosphate, magnesium

Choose all that apply:

Nitrates are needed for healthy plant growth, as they

• help the plant increase the rate of photosynthesis

• help the plant develop proteins

• prevent stunted growth in plants

• prevent leaves turning yellow

Choose all that apply:

Water is necessary for plants for the following reasons:

• keep plants firm and upright

• transport of mineral salts

• encourage evaporation in the plant

• necessary for photosynthesis

• keeping the plant cool

Water is stored in the ........ of cells.

• stoma

• chloroplasts

• spongy mesophyll

• vacuole

• cytoplasm

Which of the following is the odd one out?

• palisade layer

• upper epidermis

• spongy layer

• root hair cells

• cuticle