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Biology Past Questions and Answers

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Waec Biology Questions

Question 1801:

Deamination is the process during which

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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

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Question 1802:

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

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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

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Question 1803:

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

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A Haemoglobin
B Haemocyanin
C Chlorocruorin
D Haemoerythrin
E Melanin

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Question 1804:

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

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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

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Question 1805:

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

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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

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