Multiple Choice QuestionsWhich one of the following statement is not true about vitamins?
They were named by Funk
They are vital for life
Their deficiency causes disease
They help in digestion
Which statement is true?
In plant water and minerals are transported by phloem
During photosynthesis, oxygen is released from CO2
Ultimate source of energy for all the organisms is Sun
The leaves of Touch-Me-Not (Mimosa pudica) plant exhibit seismonastic movement
Energy equivalent to 1 amu is
0.693 MeV
1 eV
931 MeV
14.2 MeV
C.
931 MeV
The unit in which atomic and nuclear masses are measured is called the atomic mass unit (amu)
1 amu is defined as 1/12th of the mass of an atom of 6C12 isotope. It can be shown that
1amu = 1.66 x 1027kg
According to Einstien, mass-energy equivalence
E = mc2
Where, m = 1.66 x 10 -27kg c = 3 x 108 m/s , we get
E = 1.49 x 10-10 J [1MeV = 1.6 x 10-13 J ]
E = MeV
E = 931.25MeV
Hence 1 amu = 931 Mev is used as a standard conversion.
After vigorous exercise fatigue is caused due to accumulation of which substance?
Carbon dioxide
Alcohol
Lactic acid
Water
Insulin hormone converts
glycogen into glucose
glucose into glycogen
fat into glucose
protein into glucose
Which one of the following is not a characteristic of thermal radiation?
It does not require medium for its propagation
It travels with velocity of light
It travels in straight line
It affects the medium through which it propagates
While introducing Newton's law of motion a teacher writes all the formulas on the board before proceeding further. This reflects that she is following the
experimental approach
practical approach
inductive approach
deductive approach
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