KVPY Government Jobs Exams

A person has difficulty in breathing at higher altitudes because-
(A) oxygen is likely to diffuse from lungs to blood
(B) oxygen is likely to diffuse from blood to lungs
(C) partial pressure of O2 is lower than partial pressure of CO2
(D) overall intake of O2 by the blood becomes low

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KVPY Other Question
In which phase of the cell cycle are sister chromatids available as template for repair ?
(A) G1 phase (B) G2 phase (C) S phase (D) M phase In humans, the composition of a zygote that will develop into a female is-
(A) 44 A + XX (B) 44 A + XY (C) 22 + X (D) 23 A