Question
A person eats foods containing proteins. Some of the amino acids in the proteins are converted to urea and excreted from the body.
Which row identifies the sites of processes 1, 2 and 3?
▶️Answer/Explanation
Ans : A
Question
Which statement about the formation of urea is correct?
(A) Urea is formed in the kidneys from excess amino acids.
(B) Urea is formed in the liver from excess amino acids.
(C) Urea is formed in the kidneys from excess fatty acids.
(D) Urea is formed in the liver from excess fatty acids.
▶️Answer/Explanation
Ans: B
Question
Which substances are excreted from the human body?
1 carbon dioxide
2 urea
3 water
(A) 1 and 2 only
(B) 1 and 3 only
(C) 1, 2 and 3
(D) 2 and 3 only
▶️Answer/Explanation
Ans: C
Question
Some excretory products are listed.
1 carbon dioxide
2 excess ions
3 excess water
4 urea
Which products are excreted by the kidneys?
A 1, 2 and 3
B 2, 3 and 4
C 1 and 2 only
D 3 and 4 only
▶️Answer/Explanation
Ans B