The purine ring contains:

Related Mcqs:

1. Main function of stomata:

   A. Water absorption
   B. Gas exchange (CO₂ intake, O₂ release)
   C. Food storage
   D. Defense against pests

2. Conspicuous plastid in plants:

   A. Chromoplast
   B. Leucoplast
   C. Chloroplast
   D. Amyloplast

3. Main function of radicle: _____________?

   A. Seed dispersal
   B. Anchorage and absorption
   C. Flower production
   D. Nutrient storage

4. Legume fruit is produced by which plant family?

   A. Solanaceae
   B. Poaceae
   C. Fabaceae
   D. Asteraceae

5. How do dicots differ from monocots in vein distribution?

   A. Monocots have net-like venation
   B. Dicots have parallel venation
   C. Dicots have net-like venation, while monocots have parallel venation
   D. Both have random venation

6. Most common type of cell found in higher plants:

   A. Sclerenchyma
   B. Parenchyma
   C. Collenchyma
   D. Xylem

7. Mycorrhizal association shows which type of relationship?

   A. Parasitic
   B. Mutualistic
   C. Commensalistic
   D. Competitive

8. Bi-products of aerobic respiration:

   A. Glucose and oxygen
   B. CO₂ and H₂O
   C. Oxygen and ATP
   D. Glucose and CO₂

9. Leaves that protect the bud:

   A. Cotyledons
   B. Scale leaves or bud scales
   C. Petioles
   D. Tendrils

10. Ribosomes are made up of: ___________?

    A. DNA and RNA
    B. Proteins and RNA
    C. Lipids and proteins
    D. DNA and lipids