Kalıtım materyali olarak DNA

Question 1

Genetic material must show 4 traits

Answer 1

Replication
Genetic information storage
Expressing stored genetic information
variation

Question 2

What is griffiths experiment

Answer 2

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Question 3

Whatiç Avery, Macleod an Mccarry experiment

Answer 3

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Question 4

What is hershey and chase experiment

Answer 4

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Question 5

What did Erwin Chargaft and his colleagues du?

Answer 5

used hromatographic methods to separate four bases
revealed some common features of DNA

Question 6

Chargaff Rules

Answer 6

Adenin= Thymine
cytosine- guanine
A+T/ C+G = ucries by species this ratio is different in different Organisms; but it is the same in different tissues of the some organisms
complementary base pairing
T+C =A+G

Question 7

Rosalind Franklin

Answer 7

X_ray dffraction photograph of pure DNA strands in form B
showed that the molecule was helical

Question 8

Watson and Crick

Answer 8

right handed double helix structure
the two chains are opposite each other
3.4Å between the bases
only A-T G-C pairing are possible
full turn of the helix is 34Å, 10 bases per turn
major grooves minor grooves
the diameter of the helix is 20Å