What are the four basic steps of DNA replication?

Biology help? Multiple choice q's about DNA. :)?

• 4. After examining the DNA of different organisms, which of the following did Erwin Chargaff conclude about the four bases? (Note that each line represents a bond) A. A = T and C ≡ G B. A = C ≡ G = T C. A = C and G = T D. A + T = C + G 5. Combining the work of other scientists with their own research, Watson and Crick discovered that two strands of DNA join together to form a(n) A. nucleotide. B. X in a circle. C. double helix. D. covalent bond. 6. The process that makes an exact copy of a cell’s DNA is called A. conservation. B. preservation. C. replication. D. synthesis. 7. Which of the following events occurs directly after a DNA molecule is unzipped? A. Mismatched nucleotide bases are identified and replaced. B. Free-floating nucleotides pair up with exposed bases. C. Identical double-stranded DNA molecules are formed. D. Enzymes break hydrogen bonds between base pairs. 8. When new DNA molecules are formed, almost all errors are detected and fixed by A. the correct nucleotide. B. the sugar-phosphate backbone. C. DNA polymerase. D. one DNA strand. 9. What is the only difference among the four DNA nucleotides? A. The phosphate group B. The type of sugar C. The potassium group D. None of the above 10. Oswald Avery’s chemical analysis of extracts showed that the ratio of __________ to __________ was consistent with that of DNA. A. nitrogen, oxygen B. phosphorus, potassium C. nitrogen, phosphorus D. oxygen, potassium 11. Hershey and Chase used radioactive phosphorous to confirm that A. the phage’s protein was what entered the bacterium. B. the bacterium’s protein was what entered the phage. C. the bacterium’s DNA was what entered the phage. D. the phage’s DNA was what entered the bacterium.

• Answer:

  4) A 5) C 6) C 7) D 8) C 9) D 10) C 11) D