1. DNA structure Mr.Ayman Elsangary Al_Rayyan Independent Secondary School For Boys

2. How big (or small) can you imagine Virus Al_Rayyan Independent Secondary School For Boys

3. Virus Al_Rayyan Independent Secondary School For Boys

4. Bigger Virus Al_Rayyan Independent Secondary School For Boys

5. Bigger Virus Al_Rayyan Independent Secondary School For Boys

6. Bigger Virus Al_Rayyan Independent Secondary School For Boys

7. Bigger Virus Al_Rayyan Independent Secondary School For Boys

8. Yellow bacteria Al_Rayyan Independent Secondary School For Boys

9. Green bacteria Al_Rayyan Independent Secondary School For Boys

10. RBC Al_Rayyan Independent Secondary School For Boys

12. Yeast Al_Rayyan Independent Secondary School For Boys

13. Lymphocyte Yeast RBC Pollen grain Al_Rayyan Independent Secondary School For Boys

19. Dust mite Al_Rayyan Independent Secondary School For Boys

20. Human hair Al_Rayyan Independent Secondary School For Boys

29. This is how small things can be and we are talking smaller Al_Rayyan Independent Secondary School For Boys

30. DNA stands for DNA DNA is a very long, thin molecule made of subunits called nucleotides. The nucleotides are linked together like a chain. Al_Rayyan Independent Secondary School For Boys

31. Each nucleotide is constructed of 3 parts: A phosphate group, A 5 carbon sugar molecule, ( deoxyribose) A nitrogen base. Al_Rayyan Independent Secondary School For Boys

32. DNA ‘s full name, deoxyribonucleic acid. The sugar and phosphate groups are the same for each nucleotide. Al_Rayyan Independent Secondary School For Boys

33. The nitrogen base, may be any one of four different kinds. The four nitrogen bases include adenine (A), guanine (G), thymine (T), cytosine (C). Al_Rayyan Independent Secondary School For Boys

34. Adenine and guanine belong to a class of organic molecules called purines. Purines are large molecules with a double ring of carbon and nitrogen atoms. Thymine and cytosine are pyrimidines, which have a single ring of carbon and nitrogen atoms. Al_Rayyan Independent Secondary School For Boys

35. DNA is a part of almost every living thing Al_Rayyan Independent Secondary School For Boys

36. How many strands DNA has Al_Rayyan Independent Secondary School For Boys

37. Sugar phosphate backbone lies Al_Rayyan Independent Secondary School For Boys

38. What is inside DNA 2 strands Al_Rayyan Independent Secondary School For Boys

39. This question is from thanawya 3ama exam Find the complementary strand for: 3 AGGGTAAACGCGATT 5 Al_Rayyan Independent Secondary School For Boys

40. Thanks for good listening C U @ National exams Having the highest scores Al_Rayyan Independent Secondary School For Boys