Purines and pyrimidines are_________________?

Related Mcqs:

1. Purines and pyrimidines are__________________?

   A. Enzymes
   B. Nitrogenous bases
   C. Carbohydrates
   D. Lipids

2. When an atom absorbs energy the lines in the spectrum will appear which are_________________?

   A. Brighter
   B. Darker
   C. Colourless
   D. Hard to locate

3. Three elements needed for the healthy growth of plants are_________________?

   A. N P K
   B. N K C
   C. N S P
   D. N Ca P

4. Biocatalytical proteins are_________________?

   A. Enzymes
   B. Substrate
   C. Lipids
   D. any of above

5. Co-enzymes are_________________?

   A. Non proteineous
   B. Proteineous
   C. sugars
   D. lipids

6. The common thing in phthalic acid and oxalic acid is that both are_________________?

   A. Aromatic
   B. Dicarboxylic
   C. Hydrocarbons
   D. Strong acids

7. Molecular mass of water (18g) means__________________?

   A. 1-mole molecules of water
   B. 1-gram molecule of water
   C. 3-gram atoms
   D. all

8. Molecular ions are formed by passing______________________?

   A. High energy electron beam
   B. ? – particle
   C. X-rays
   D. All of the above

9. The hardest of the following solids is__________________?

   A. sodium
   B. diamond
   C. graphite
   D. magnesium

10. The unit of molality is__________________?

    A. moles dm-3
    B. moles kg-1
    C. gram dm-3
    D. none