Waec Biology Past Questions and Answers

Question 1366:

• WAEC 2011

Which of the following groups of substances are not six-carbon compounds?

A. Glucose and lactose
B. Lactose and cellulose
C. Glucose, Lactose and Pyruvate
D. Pyruvate and cellulose

Question 1367:

• WAEC 2011

The conversion of glucose to starch in the leaf during the day principally

A. Enables photosynthesis
B. Prevents osmotic problems
C. Enables the leaf to store the starch
D. Enables glucose to be used up

Question 1368:

• WAEC 2011

A purple colour was obtained when sodium hydroxide solution and a drop of copper sulphate solution were added to a food substance. The food substance is likely to be a

A. Carbohydrate
B. Fat
C. Protein
D. Sugar

Question 1369:

• WAEC 2011

Which of the following enzymes is active in the duodenum?

A. Pepsin
B. Renin
C. Trypsin
D. Amylase

Question 1370:

• WAEC 2011

The following organisms are producers except

A. Hibiscus
B. Mushroom
C. Cactus
D. Spirogyra