help with DNA?

Question

1. where in the cell is the DNA found?
2. what are the building blocks of DNA?
3. what sugar is found in the DNA molecule?
4. name the 2 purine bases.
5. name the 2 pyrimidine bases.
6. adenine bonds w/ which other bases
7. guanine bonds with which other bases.
8. what molecules make up the backbone or sides of the DNA molecule?

Answer 1

1. the nucleus
2. nucleotides
3. 2-deoxyribose
4. adenine, guanine
5. cytosine, and thymine (uracil in RNA transcription)
6. thymine/uracil
7. cytosine
8. sugars and phosphate groups

Answer 2

1. DNA is found predominantly in the nucleus of the cell and is tightly wound when cells are not actively dividing. Mitochondria also have DNA but only for their own purposes and replication.
2. The building blocks of DNA are nucleotides. A nucleotide consists of 1 phosphate group, 1 deoxyribose, and 1 purine or pyrimidine base.
3.DNA contains 2'-Deoxyribose (hence the "D" in the acronym DNA).
4.The purine bases are adenine and guanine.
5.The pyrimidine bases are Thymine and cytosine.
6. Adenine hyrogen bonds with thymine in normal double stranded DNA.
7. Guanine hydrogen bonds with cytosine in normal double stranded DNA
8. The backbone is made of alternating phosphate and deoxyribose groups. Phosphate links the alternating deoxyribose at the 5 and 3 positions of the sugar. The bases of the DNA strand are attached to the 1 position.

Answer 3

1. Nucleus
2. Nucleotides
3. 2-Deoxyribose
4. Adenine and Guanine
5. Cytosine and Thymine
6. Adenine bonds Thymine (+ Uracil in mRNA and Inosine in tRNA)
7. Guanine bonds Cytosine
8. Sugars and phosphate groups (2-Deoxyribose)

Answer 4

1.DNA is found in chromosomes located in nucleus of the cell.
2.DNA is made up of nucleotides (linked together in a chain &arranged like a twisted ladder).each nucleotide is consists of of 3 units -a pentose sugar molecule called deoxyribose,a phosphate group,a nitrogenous base-adenine(A),guanine(G),thymine(T),cytosine(C).
3.a pentose sugar.
4.purine-guanine,adenine.
5.pyrimidine-cytosine,thymine.
6.adenine with thymine.
7.guanine with cytosine.
8.phosphate forms the backbone.each phopsphate with two sugar molecule&each sugar with nitrogenous base.

Answer 5

Wikipedia is where you should look first:

Answer 6

try this .
http://www.blc.arizona.edu/Molecular_Graphics/DNA_Structure/DNA_Tutorial.HTML