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DNA facts

terms and definitions

QuestionAnswer
1. Write out the full name for DNA. deoxyribonucleic acid
2. What is a gene? a segment of DNA that codes for a particular protein
3. Where in the cell are chromosomes located? nucleus
4. DNA can be found in what organelles in the cell? Mitochondria and chloroplasts
Mitochondria Powerhouse of the cell, organelle that is the site of ATP (energy) production
5. What two scientists established the structure of DNA? Watson and Crick
6. What is the shape of DNA? Double helix
7. The sides of the DNA ladder are composed of what? Sugar (deoxyribose) & phosphate
8. The "rungs" of the DNA ladder are made of what? Nitrogenous bases
Nitrogeneous Bases Adenine, Thymine, Guanine, Cytosine
9. What sugar is found in DNA? In RNA? Deoxyribose & ribose
10. How do the bases bond together? A bonds with __T__ G bonds with ___ C ___
11. The two purines in DNA are __adenine____ and _guanine___.
Purines Bases with a double-ring structure.Adenine and Guanine
Pyrimadine bases cytosine, thymine, uracil
12. DNA is made of repeating units called nucleotides___.
13. Why is RNA necessary to act as a messenger? Why can't the code be taken directly from DNA? DNA is too big to leave the nucleus
14. Proteins are made where in the cell? On the ribosome in the cytoplasm
15. How do some cells become brain cells and others become skin cells, when the DNA in ALL the cells is exactly the same? most genes are turned off
Created by: rufus webster
 

 



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