DNA Replication wksht - die PDF

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DNA Replication Directions: Label the diagram below with the following choices: Nucleotide

Deoxyribose

Phosphate Group

Base Pair

Hydrogen Bond

Nitrogenous Base

DEOXYRIBOSE

PHOSPHATE GROUP

NITROGENOUS BASE

BASE PAIR

HYDROGEN BOND

NUCLEOTIDE

7.

Guanine, cytosine, thymine, and adenine are the four PURINES in DNA.

8.

In DNA, guanine always forms hydrogen bonds with CYTOSINE

9. The process of REPLICATION produces a new copy of an organism's genetic information, which is passed on to a new cell.

10. The double coiled, "staircase" shape of DNA is called a what? A Double helix 11. What do the letters DNA stand for? deoxyribonucleic acid, 12. Where is DNA found? Cell nucleus 13. Label the nucleotides (A, T, G, C) in the DNA molecule below:

A

G

C

T

14. What is the first step in the process of DNA replication? unwinds a short stretch of the DNA double helix 15. Which enzyme is responsible for "unzipping" the DNA double helix? helicase 16. Which enzyme is responsible for facilitating the hydrogen bonding between nucleotides in a new DNA molecule? polymerase3 17. Which enzyme is responsible for creating the covalent bonds that connect the sugar phosphate backbone of the new DNA molecules? The DNA enzyme ligase

18. If the sequence of one single strand of DNA is C-A-A-G-T-A-G-G-C-T, what is the complementary strand? G-T-T-C-A-T-C-C-G-A

19. Describe semi-conservative replication. the mechanism of DNA replication in all known cells.

20. Why is DNA replication important to the growth and development of a multi-cellular organism? produce two identical copies of a DNA molecule.

21, The model of DNA below is ready to be copied. Compared to the original double helix on the right, evaluate the copies below made during two attempts of DNA replication. Circle any errors with the replication if they occurred:

22. Add the complimentary strand to the DNA sequence below on the left. Circle the errors in the replicated strands on the right. A G C T A T A

T C G A T A T

A G C

T C G

T A

A T

T A

G T

G G C T A C A

T C G A T A T...