Waec Biology Past Questions For Year 2006

If an enzyme works best in an acid medium, in which of the following parts of the human gut is the pH best for

enzyme activities? In the

Which of the following food substances would produce a translucent mark when rubbed on a white paper?

Study the following list of deficiency symptoms in animals; use it to answer the questions below

I. Loss of appetite and weight; II. Delayed healing of wounds; III. Rickets; IV Sterility in animals

V Failure of blood to clot; VI. Night blindness

Which of the following combination of food substances would correct the deficiency numbered II?

A. Loss of appetite and weight; II. Delayed healing of wounds; III. Rickets; IV Sterility in animals
B. Tomatoes, oranges and mangoes
C. Yeast, liver and rice
D. Red palm oil, carrot and egg yolk
E. Green vegetables, butter and meat

Study the following list of deficiency symptoms in animals; use it to answer the questions below

I. Loss of appetite and weight; II. Delayed healing of wounds; III. Rickets; IV Sterility in animals

V Failure of blood to clot; VI. Night blindness

Which of the following vitamins would correct the deficiency numbered V?

A. Loss of appetite and weight; II. Delayed healing of wounds; III. Rickets; IV Sterility in animals
B. Vitamin K
C. Vitamin A
D. Vitamin C
E. Vitamin B

Which of the following components of an ecosystem does not contribute to the biomass of the system?