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About 98 percent of the mass of every li...

About 98 percent of the mass of every living organism is composed of just six elements including carbon, hydrogen, nitrogen, oxygen and

A

Calcium and phosphorus

B

Phosphorus and sulfur

C

Sulfur and magnesium

D

Magnesium and sodium

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The correct Answer is:
B
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About 98 percent of the mass of every living organisms is composed of just six elements including carbon, hydrogen, nitrogen, oxygen and

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Adenine is a substituted form of a heterocyclic nitrogenous base Purine. Adenine is found in both polymers DNA and RNA . Adenine is composed of the elements carbon, hydrogen and nitrogen and has molecular mass of 13.5 amu . Upon analysis, it was found that the ratio of % (by w.t. ) of carbon to that of total % (by wt ) of hydrgoen and nitrogen was found to be 4:5 respectively. The ratio of number of N atoms to hydrogen atoms is 1 : 1 . Now, answer the following questions: In one molecule of adenine :

Adenine is a substituted form of a heterocyclic nitrogenous base Purine. Adenine is found in both polymers DNA and RNA . Adenine is composed of the elements carbon, hydrogen and nitrogen and has molecular mass of 13.5 amu . Upon analysis, it was found that the ratio of % (by w.t. ) of carbon to that of total % (by wt ) of hydrgoen and nitrogen was found to be 4:5 respectively. The ratio of number of N atoms to hydrogen atoms is 1 : 1 . Now, answer the following questions: The amount of glucose (C_(6)H_(12)O_(6)) obtained when all the carbon in 36 mg of adenine is converted into glucose is :

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  8. Guard cells help in

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  10. Which of the following is a symbiotic nitrogen fixer ?

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  11. Which one of the following pairs is wrongly matched?

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  12. An element playing important role in nitrogen fixation is

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  13. Which one of the following is not a micronutrient

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  14. The chief water conducting elements of xylem in gymnosperms are

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  15. Which one of the following structures between two adjacent cells is an...

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  16. One of the free-living, anaerobic nitrogen-fixer is Or which of th...

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  17. The common nitrogen-fixer in paddy fields is

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  18. Nitrifying bacteria:-

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