Waec Biology Past Questions and Answers

Question 1801:

• WAEC 1988

Deamination is the process during which

A. Excess amino acid is broken down into ammonia and keto acid
B. Fats and oil are converted into an emulsion for absorption
C. Excess glucose is converted and store as glycogen in the liver
D. Glycogen is reconverted into glucose through the action of glucagon
E. Excess amino acid is converted into proteins

Question 1802:

• WAEC 1988

Which of the following statements on urine production is not correct?

A. Concentrated urine is produced under the control of antidiuretic hormone
B. The total volume of urine produced depends on the need for water excretion
C. If there is excess intake of water, dilute urine is expected
D. If there is a shortage of water in the body the volume of the urine produced is decreased
E. In the presence of antidiuretic hormone dilute urine is produced

Question 1803:

• WAEC 1988

The pigment in the malphigian layer responsible for skin colouration is known as

A. Haemoglobin
B. Haemocyanin
C. Chlorocruorin
D. Haemoerythrin
E. Melanin

Question 1804:

• WAEC 1988

Co-ordination is achieved in the body of mammals through the action of the

A. Endocrine and nervous systems
B. Skeletal and nervous systems
C. Muscular and nervous systems
D. Circulatory and nervous systems
E. Skeletal, muscular and nervous system

Question 1805:

• WAEC 1988

Which of the following statements is correct of hormones? Hormones are

A. Secreted into the blood through ducts
B. Secreted directly into the blood streem
C. Inactive chemical substance in the blood stream
D. Non-specific in their mode of action
E. Secreted at the site of the needed organ