In the estmation of phosphate using molybdic acid, the absorbance is read at
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In the estimation of phosphate using molybdic acid which of these reagents is not used
A. ammonia molybdate
B. p-methyl aminophenol sulphate
C. ascorbic acid
D. phosphomolybdic acid
Answer: D
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Which of these canot be used in the measurement of pH of urine
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The estimation of DNA concentration by requires all but one of the following:
A. Thin layer chromatography
B. electrophoresis
C. agarose gel
D. ethidium bromide
Answer: A
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Which of these statement is not true
A. 1 OD unit of single-stranded DNA is 33 micrograms/ml
B. 1 OD unit of single-stranded RNA is 40 micrograms/ml
C. 1 OD unit of single-stranded RNA is 25 micrograms/ml
D. 1 OD unit of double-stranded DNA is 50 micrograms/ml
Answer: C
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One of these is not a method for DNA estimation.
A. Estimation of DNA by the diphenylamine reaction
B. Estimation DNA by means of the orcinol reaction
C. Estimation of DNA by spectrophotometric means
D. Estimation by comparing the fluorescence of DNA bands in an agarose gel to a standard
Answer: B
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At what wavelength is the absorbance maximum in the estimation of DNA by diphenylamine reaction
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The blue coloration given when DNA is treated with diphenylamine under acid conditionsis due to ______
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Which of these is not true of deoxyribonucleoprotein?
A. It is soluble in water
B. It is insoluble insolutions of high ionic strength
C. It is insoluble in solutions of low ionic strength
D. It can be dissolved in 2 mol/litre saline
Answer: B
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All but one of these strongly absorb ultraviolet light in the 260 to 280 nm range.
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