Multiple Choice QuestionsIn living beings ammonia is converted into urea through
ornithine cycle
citrulline cycle
fumarine cycle
arginine cycle
Assertion : Phenylketonuria is a disease in which excretion of phenylalanine occurs in urine.
Reason : It is due to dietary imbalance.
If both Assertion and Reason are true and Reason is the correct explantion of Assertion
If both Assertion and Reason are true and Reason is not the correct explanation of Assertion
If Assertion is true but Reason is false
If Assertion is false but Reason is true
C.
If Assertion is true but Reason is false
Phenlyketonuria is a genetic disorder in which there is disordered metabolism of the amino acid phenylalanine, leading to severe mental retardation of affected children. The disease is caused by the absence or deficiency of the enzyme phenylalanine hydroxylase, which results in the accumulation of phenylalanine in all body fluids. There are also high levels of the ketone phenylpyruvate in the urine.
Glomerular filtrate is
blood minus blood corpuscles and plasma protein
blood minus corpuscles
mixture of water, ammonia and corpuscles
urine
Which of the following amino acids are present in ornithine cycle
Valine and cystine
Arginine and citrulline
Glycine and methionine
None of these
The ornithine cycle removes two waste products from the blood in liver. These products are
CO2 and urea
ammonia and urea
CO2 and ammonia
ammonia and uric acid
Which of the following are uricotelic animals?
Rohu and frog
Camel and frog
Lizard and crow
Earthworm and eagle
A person passes much urine and drinks much water but his blood glucose level is normal. This condition may be the result of:
a reduction in insulin secretion from pancreas
a reduction in vasopressin secretion from posterior pituitary
a fall in the glucose concentration in urine
an increase in secretion of glucagon
ADH controls water permeability of
collecting tube
proximal convoluted tubules
distal convoluted tubules
all of the above
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