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Biology

1)Both in cells and extracellular fluids diabasic phosphate (HPO4-) and monobasic phosphate (H2PO4-) act as acid base buffers to maintain-
K+ concentration of extracellular fluid Na+ concentration of extracellular fluid
Na+ concentration of cellular fluid H+ concentration of cellular fluid
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2)All the statements are correct except
Molybdenum is necessary for fixation of nitrogen catalysed by the enzyme nitrogenase Mitochondria are rich in Manganese
Calcium and manganesium have no effect on the excitability of nerves and muscles Mangnesium is essential for a large number of enzymes, particularly those utilizing ATP
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3)The most abundant element in cell/living matter is
C N
H O
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4)Element(s) found in cytochromes
Mg++ Fe++ and Cu++
Cu++ Fe+++ and Mg++
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5)Descending order of concentration of K, Na, Ca in a cell
Ca - K - Na K - Na - Ca
Na - K - Ca Na - Ca - K
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6)All the macromolecules are the result of the process of polymerisation, a process in which repeating subunits termed monomers are bound into chains of different lengths except
Proteins Lipids
Carbohydrates Nucleic acids
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7)The three monosaccharide units of Raffinose are
Glucose, Levulose and galactose Glucose, Pentose and maltose
Fructose, fructose and galactose Cgucose, fractose and sucrose
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8)The number of carbon atoms in monosaccharide vary from
3 to 6 3 to 7
2 to 7 3 to 5
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9)The sweetest of all naturally occurring sugar is
Mannose Galactose
Fructose Glucose
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10)Glucose is
Ketose hexose sugar Aldose hexose sugar
Furanose pentose sugar Pyranose pentose sugar
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11)Glucose is also called
Grape sugar Corn sugar
Dextrose All of these
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12)Why sucrose is used instead of glucose to preserve fruit product?
Sucrose is more common in nature Sucrose is easily available and has both glucose and fructose
Glucose is reactive as it has CHO group None of these
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13)The two sugars of honey are
Dextrose and lactose Dextrose and levulose
Glucose and galactose Glucose and fructose
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14)Which one of the following is not reducing sugar?
Sucrose Glucose
Lactose Maltose
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15)Which one of the following will yield only glucose on hydrolysis?
Maltose Raffinose
Lactose Sucrose
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