Biology

14. The major components of a DNA molecular subunit are
a. a chromosome, deoxyribose, and double helix
b. a five-carbon sugar, phosphate group, and a nitrogen-containing base
c. adenine, guanine, cytosine, and thymine
d. all of the above
D?

16. During DNA replication, all of the following steps occur EXCEPT
a. enzymes proofread new strands for errors and correct them
b. the double helix is unwound by DNA polymerases
c. base-pairing rules determine which nucleotide is added to new strands
d. each strand of a DNA double helix is copied, forming two identical double helixes


17. When errors in nucleotide sequencing occur,
a. DNA polymerase replaces the incorrect nucleotide with the correct nucleotide
b. enzymes dissolve the incorrect nucleotide so DNA polymerase can add the correct one
c. purines replace pyrimidines in the DNA molecule
d. DNA polymerase proofreads for errors while another enzyme corrects it

Thanks
-MC

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  1. 14: If your momma asked you what DNA was made of...

    16. What exactly does polymerase mean? What does an origin protein do? ((Broken Link Removed)

    17. http://en.wikipedia.org/wiki/DNA_replication

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    bobpursley
  2. For 14 ...

    Start by determining what the molecular subunits - the monomers - that make up DNA are.

    Then look up what things make up such a monomer.

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