FORM AND FUNCTIONS - Jamb Biology Past Questions and Answers

Question 621:

• JAMB 1999

Substance manufactured by the leaves are transported to other parts of the plant through the

A. Phloem
B. Companion cells
C. Sieve tubes
D. Cambium

Question 622:

• JAMB 1999

After a meal of yam has been digested, the highest concentration of glucose is to be found in the

A. Hepatic artery
B. Pulmonary vein
C. Hepatic portal vein
D. Posterior vena cava

Question 623:

• JAMB 1999

The dark reaction of photosynthesis involves

A. Fixation of carbon (IV) oxide to give six-carbon sugar
B. Fixation of carbon (IV) oxide with the help of oxygen
C. Use of carbon (IV) oxide to produce glucose using ATP
D. Fixation of carbon (IV) oxide on chlorophyll using hydrogen

Question 624:

• JAMB 1999

Mammals acclimatize to reduced oxygen content at high altitudes by

A. The stimulation of marrow to reduce the amount of erythrocytes produced
B. Increasing the rate at which erythrocytes are destroyed
C. The stimulation of marrow to produce more erythrocytes
D. Increasing the break down of the protein portion of the erythrocytes

Question 625:

• JAMB 1999

The modes of nutrition in Nitrobacter, Ascaris and Homo sapiens respectively are

A. Photosynthetic , parasitic and holozoic
B. Chemosynthetic, parasitic and holozoic
C. Photosynthetic, parasitic and heterophytic
D. Chemosynthetic, holophytic and holozoic