3681: Sucrose content in sugarcane decreases
(a) if high rainfall occurs during the period of growth of the plant
(b) if frost occurs during the period of ripening
(c) if there is fluctuation in temperature during the period of growth of the plant
(d) if there is high temperature during the time of ripening
3682: Which one of the following processes in the bodies of living organisms is a digestive process ?
(a) Breakdown of proteins into amino acids
(b) Breakdown of glucose into CO2 and H2O
(c) Conversion of glucose into glycogen
(d) Conversion of amino acids into proteins
3683: Which one of the following statements is correct?
(a) Prions are the smallest free-living cells
(b) The cell wall of Mycoplasmas is made up of amino sugars
(c) Viroids consist of a single-stranded RNA molecule
(d) Rickettsias lack cell wall
3684: The messages received by and transmitted from the brain to the various parts of the body take the form of:
(a) Nervous impulses
(b) Chemical impulses
(c) Mechanical impulses
(d) Automatic impulses
3685: To know whether the rich are getting richer and the poor getting poorer, it is necessary to compare
(a) the wholesale price index over different periods of time for different regions
(b) the distribution of income of an identical set of income recipients in different periods of time
(c) the distribution of income of different sets of income recipients at a point of time
(d) the availability of foodgrains among two sets of people, one rich and the other poor, over different periods of time