Chapter 12

Which is not a nucleotide base in DNA? a. adenine b. guanine a. adenine b. guanine e. cytosine f. All are in DNA.

What are the base-pairing rules for DNA? a. \(A-G, T-C\) b. \(A-C, T-G\) c. \(A-U, C-G\) d. \(A-T, G-C\)

One species' DNA differs from others in its ___. a. sugars b. phosphates c. base sequence d. all of the above

When DNA replication begins, ___. a. the two DNA strands unwind from each other b. the two DNA strands condense for base transfers c. two DNA molecules bond d. old strands move to find new strands

Show the complementary strand of DNA that forms on this template DNA fragment during replication: \(5^{\prime}-G G T T T C T T C A A G A G A-3^{\prime}\)

Match the terms appropriately. $$ \text { bacteriophage } \quad \quad\quad\quad\quad \text { a. nitrogen- containing base, sugar, phosphate group(s) } $$ $$ \text { clone } \quad \quad\quad\quad\quad \text { b. copy of an organism } $$ $$ \text { nucleotide } \quad \quad\quad\quad\quad \text { c. nucleotide base with one carbon ring } $$ $$ \text { purine } \quad \quad\quad\quad\quad \text { d. only DNA and protein } $$ $$ \text { DNA ligase } \quad \quad\quad\quad\quad \text { e. fills in gaps, seals breaks in a DNA strand } $$ $$ \text { DNA polymerase } \quad \quad\quad\quad\quad \text { f. nucleotide base with two carbon rings } $$ $$ \text { pyrimidine } \quad \quad\quad\quad\quad \text { g. adds nucleotides to a growing DNA strand } $$