Gene action in man was first studied by:
A) Garrod
B) Beadle and Ephrussi
C) Beadle and Tatum
D) Brenner
Alkaptonuria is a human disease which is characterized by:
A) Excessive excretion of alkapton in the urine.
B) High level of phenylalanine in blood, spinal fluid, and sweat.
C) Excretion of P-hydroxy phenyl pyruvic acid and tyrosine in urine.
D) Lack of melanin pigment in skin, hair, and iris.
The one gene one enzyme hypothesis was proposed by:
A) Beadle and Ephrussi
B) Beadle and Tatum
C) Brenner
D) Crick
In wobble pairing, abnormal pairing in codon occurs at the:
A) first base
B) second base
C) first and second bases
D) third base
Signal codon refers to:
A) UAA
B) UAG
C) UGA
D) AUG
E) All of the above
Excessive secretion of alkapton occurs in the urine of a person suffering from:
A) Alkaptonuria
B) Phenylketonuria
C) Sickle cell anemia
D) All of these

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