Biology 1990 Jamb Past Questions and Answers

Question 16 :

• JAMB 1990

Which type of the following cells is thin-walled and living at maturity?

A. Collenchyma
B. Sieve tube
C. Xylem vessel
D. Sclerenchyma

Question 17 :

• JAMB 1990

The mode of nutrition in which digestion is extracellular is

A. Holophytic
B. Parasitic
C. Holozoic
D. Saprophytic

Question 18 :

• JAMB 1990

The first step in the process of photosynthesis is the

A. Activation of the chlorophyll
B. Photolysis of water
C. Reduction of carbondioxide
D. Formation of sugar

Question 19 :

• JAMB 1990

Which of the following food substance will produce a brick-red colour when warmed with Benedict's solution?

A. Glucose
B. Starch
C. Egg white
D. Maltose

Question 20 :

• JAMB 1990

The organ which secretes digestive enzymes as well as hormones is the

A. Liver
B. Salivary gland
C. Pancreas
D. Spleen