KVPY Government Jobs Exams

Which one of the following is true about enzyme catalysis ?
(A) The enzyme changes at the end of the reaction
(B) The activation barrier of the process is lower in the presence of an enzyme
(C) The rate of the reaction is retarded in the presence of an enzyme
(D) The rate of the reaction is independent of substrate concentration

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KVPY Other Question

In cattle, the coat colour red and white are two dominant traits, which express equally F1 to produce roan ( red and
white colour in equal proportion). If F1 progeny are selfbred, the resulting progency in F2 will have phenotypic
ration (red : roan: white) is –
(A) 1: 1:1 (B) 3 : 9 : 3 (C) 1 : 2 : 1 (D) 3 : 9 : 4 Vibrio cholerae causes cholera in humans. Ganga water was once used successfully to combat the infection. The
possible reason could be–
(A) High salt content of Ganga water
(B) Low salt content of Ganga water
(C) Presence of bacterophases in Ganga water
(D) Presence of antibiotics in Ganga Water