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21.

Which of these is not an excretory waste product:

A.	Allantion	B.	Trimethylaminoxide
C.	Guanine	D.	Pyruvic acid

22.

Hippuric acid excreted in rabbit's urine is formed by combination of:

A.	Benzoic acid in food with glycine	B.	Ammonia with guanine
C.	Deamination of amino acids	D.	None of these

23.

In which of these the benzoic acid of food combines with ornithine to form ornithuric acid:

A.	Rabbit	B.	Birds
C.	Man	D.	Frog

24.

In biochemical phase of excretion, the ammonia is formed by:

A.	Deamination of excess of amino acids	B.	Transmination of excess of amino acids
C.	Decarboxylation of excess of amino acids	D.	None of these processes

25.

Deanination of excess of amino acids occurs in the:

A.	Liver of all vertebrates	B.	Kidney of all vertebrates
C.	Spleen of all vertebrates	D.	Intestine of all vertebrates

26.

In which of these animals the ammnia formed by deamination of excess of amino acids is converted to urea:

A.	Aminotelic animals	B.	Ammonotelic animals
C.	Ureotelic animals	D.	None of these

27.

Which of these is also called ornithine cycle resulting in the formation of urea from ammonia:

A.	Kerb's cycle	B.	Glycolysis
C.	Both (a) & (b)	D.	None of these

28.

Ornithine cycle occurs in the:

A.	Liver of all ureotelic animals	B.	Kidney of all ureotelic animals
C.	Both (a) & (b)	D.	None of these

29.

Process of ultrafiltration occurs:

A.	Within the glomerulus when blood from efferent renal arteriole passes through its capillaries	B.	Within loop of Henle when the filtrate passes through it:
C.	Jointly in both of these parts of the nephron	D.	In none of the parts of the nephron

30.

Glomerulus in man is a network of about:

A.	20 capillaries	B.	30 capillaries
C.	50 capillaries	D.	None of these