Yearly 5107 MCQ (2011)

The diagram shows a root hair cell. Which structures are found in both this cell and also in most animal cells?

• A. cell membrane and cell wall

• B. cell membrane and nucleus

• C. cell wall and vacuole

• D. chloroplasts and nucleus

The diagram shows a section through a leaf. Which structure is an organ and which structure is a tissue?

• organ: P, tissue: S

• organ: Q, tissue: R

• organ: R, tissue: P

• organ: S, tissue: Q

What is the concentration of sugar in solution X at the start of the experiment?

• 10%

• 20%

• 30%

• 40%

At which temperature is the rate of digestion of starch the greatest?

• 10°C

• 30°C

• 40°C

• 50°C

A food substance is tested with three reagents. Iodine solution remains brown. The biuret test gives a purple colour. The ethanol test gives an emulsion. Which nutrient(s) does the food substance contain?

• A

• B

• C

• D

What does the ring of muscle control?

• the amount of acid released into the stomach

• the contractions of the wall of the stomach

• the entry of food into the stomach

• the release of food from the stomach

Which substance is stored in the liver?

• glycogen

• protein

• starch

• sugar

Which one of the following is produced by photosynthesis?

• carbon dioxide

• nitrogen

• sugar (glucose)

• chlorophyll

During photosynthesis, where does the greatest conversion of light energy to chemical energy take place?

• A

• B

• C

• D

Most water is lost from a plant through the

• phloem.

• roots.

• stomata.

• xylem.