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

DNA structure

Mr.Ayman Elsangary

Al_Rayyan Independent Secondary School For Boys

How big (or small) can you imagine

Virus


Virus


Bigger Virus


Bigger Virus


Bigger Virus


Bigger Virus


Yellow bacteria


Green bacteria


RBC



Yeast


Lymphocyte

Yeast

RBC

Pollen grain







Dust mite


Human hair










This is how small things can be and we are talking smaller


DNA stands for

DNADNA is a very long, thin molecule made of subunits called nucleotides. The nucleotides are linked together like a chain.


Each nucleotide is constructed of 3 parts: A phosphate group ,

A 5 carbon sugar molecule, ( deoxyribose)

A nitrogen base .


DNA ‘s full name, deoxyribonucleic acid.

The sugar and phosphate groups are the same for each nucleotide .


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

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.


DNA is a part of almost every living thing


How many strands DNA has


2 3 4

Sugar phosphate backbone lies


inside outside

What is inside DNA 2 strands


sugar phosphate Bases

This question is from thanawya 3ama exam

Find the complementary strand for:

3 AGGGTAAACGCGATT 5


3TCCCATTTGCGCTAA53TCCCATTTGCGCTAT33TCCCATTTCGCGTAA5

Thanks for good listening

C U @ National exams

Having the highest scores


Date post:	13-Jan-2016
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DNA structure Mr.Ayman Elsangary Al_Rayyan Independent Secondary School For Boys.

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