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21 DNA structure
powerpoint lecture
11
Biology
Undergraduate 1
03/07/2011

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Term
True or false. Red blood cells do not have DNA.
Definition
true.
Term
Where are genes located?
Definition
on chromosomes
Term
What makes up DNA
Definition
a nitrogenous base, a sugar and a phosphate group
Term
What is Chargaff's rule?
Definition
in any species there is an equal number of A and T (A=T) and an equal number of C and C (C=G)
Term
Which is wider, a pyrimadine or a purine
Definition
a purine
Term
Which bases are purines and which are pyrimadines 
Definition

purines - adenine and guanine

pyrimadines - cytosine and thymine

Term
Explain the structures of Adenine and Thymine, and Guanine and Cytosine.
Definition
[image]
Term
The two strands of DNA are ____.
Definition
Complementary
Term
What are on the 5' and 3' ends?
Definition
a phosphate group, and a hydroxyl group
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