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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

phosphorus and sulphur

B

sulphur and magnesium

C

magnesiurn and sodium

D

calcium and phosphorus

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The correct Answer is:
A
About 98% of the mass of every living organism including bacterium and human beings is composed of just six elements, i.e. Carbon (C), Hydrogen (H), Nitrogen (N), Oxygen (0), Phosphorus (P) and Sulphur (S).
Charagaff (1950) suggested that despite wide compositional variations exhibited by different types of DNA the total amount of purines equaled the total amount of pyrimidines (A+ G = T + C).
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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 :

NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)-BIOMOLECULES-EXERCISE
  1. Which one of the following is not a constituent of cell membrane

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  2. The two polynucleotide chains in DNA are

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  3. About 98 percent of the mass of every living organism is composed of j...

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  4. One turn of the helix in a B- from DNA is approximately

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  5. Antibodies in our body are complex

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  6. Antiparallel strands of a DNA molecule means that :

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  7. An organic substance bound to and enzyme and essential for its activit...

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  8. An enzyme that can stimulate germination of barley seeds is

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  9. Nucleotides are building blocks of nucleic acids. Each nucleotide is a...

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  10. Which of the following is the simplest amino acid

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  11. Which one of the following hydrolyses internal phosphodiester, bonds i...

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  12. Which one of the following statements regarding enzyme inhibition is c...

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  13. Enzymes, vitamines and hormones can be classified into a single catego...

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  14. The catalytic efficiency of two different enzymes can be compared by t...

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  15. The most abundant element present in the plants is Or Which of th...

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  16. Which form of RNA has a structure resembling clover leaf?

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  17. The major portion of the dry weight of plants comrises of Or Fram...

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  18. Collagen is

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  19. Lipids are incoluble in water, because lipids molicules are

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  20. Which of the following is a reducing sugar

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