0610 PLANT & HUMAN NUTRIENTS

The following can be used to write a word equation for photosynthesis.

1 carbon dioxide and water

2 light and chlorophyll

3 glucose and oxygen

Which shows a correct word equation for photosynthesis?

• 1 → 2 in the presence of 3

• 1 → 3 in the presence of 2

• 2 → 3 in the presence of 1

• 3 → 1 in the presence of 2

Which row shows the most likely number of chloroplasts in three types of cell in a leaf?

• A

• B

• C

• D

What are the parts labelled 1, 2 and 3?

• 1=DENTINE, 2=ENAMEL, 3=PULP

• 1=ENAMEL, 2=DENTINE, 3=PULP

• 1=ENAMEL, 2=PULP, 3=DENTINE

• 1=PULP, DENTINE, 3-ENAMEL

What is the function of the lacteal in a villus?

• absorbs the fatty acids

• allows substances to pass from the lumen of the intestine into the villus

• takes oxygen to the villus

• absorbs the glucose and amino acids

What are tissues 1, 2 and 3?

• A

• B

• C

• D

One of the symptoms of the disease cholera is diarrhoea. This is due to water loss by osmosis

caused by the cholera toxin.

Cholera toxins result in

• secretion of chloride ions out of the small intestine lowering the water potential.

• secretion of chloride ions out of the small intestine raising the water potential.

• secretion of chloride ions into the small intestine lowering the water potential.

• secretion of chloride ions into the small intestine raising the water potential.

The diagram shows an experiment investigating the effect of light intensity on an aquatic plant.

Photosynthesis occurred in both test-tube P and test-tube Q. Both test-tubes were kept at the

same temperature. The number of bubbles produced in test-tube P was 12 bubbles per minute.

What is the most likely number of bubbles produced in one minute in test-tube Q?

• 0

• 3

• 12

• 48

The diagram shows an experiment to investigate the balance between respiration and

photosynthesis.

In which tube are photosynthesis and respiration taking place at the same time?

• A

• B

• C

• D

A student investigates the breakdown of fats in milk by lipase. Four test-tubes labelled A to D are

set up.

The table shows the contents of each test-tube.

In which test-tube will the contents become acidic most quickly?

• A

• B

• C

• D

A person eats some cheese which contains a lot of fats and protein.

Which row shows the combination of substances that will digest the cheese most effectively?

• A

• B

• C

• D