Biology 2010 Waec Past Questions and Answers

Question 26 :

• WAEC 2010

In which of the following organic compounds is the hydrogen-oxygen ratio equal to 2:1?

A. Proteins
B. Carbohydrates
C. Lipids
D. Vitamins

Question 27 :

• WAEC 2010

A man suffering from obesity must avoid meals containing

A. Margarine and butter
B. Rice and beans
C. Carrots and oranges
D. Beef and fish

Question 28 :

• WAEC 2010

In testing for starch in a leaf, the leaf is first boiled in water for about a minute so that the

A. Cell walls are hardened
B. Cells are killed
C. Chlorophyll is dissolved out
D. Iodine will penetrate

Question 29 :

• WAEC 2010

Which of the following food substances is incorrectly linked to its enzyme?

A. Protein - trypsin
B. Fat - lipase
C. Sucrose - pepsin
D. Starch - amylase

Question 30 :

• WAEC 2010

Which of the following pH values is the best for the action of the enzymes - renin and pepsin in the
stomach?

A. PH2
B. PH7
C. PH8
D. PH9