A DNA strand has the sequence ATCGGC. Which is the complementary strand of DNA? UAGCCG GCTAAT TAGCCG UGTCCT

Below is the step-by-step solution in markdown using LaTeX for mathematical formulas. --- ### Step 1: Understand the Base Pairing Rules In DNA, the base pairing rules are: - \( \text{A} \) pairs with \( \text{T} \) - \( \text{T} \) pairs with \( \text{A} \) - \( \text{C} \) pairs with \( \text{G} \) - \( \text{G} \) pairs with \( \text{C} \) --- ### Step 2: Write Down the Given DNA Sequence The given DNA sequence is: \[ \text{A T C G G C} \] --- ### Step 3: Determine the Complementary Sequence Using the base pairing rules, we complement each nucleotide: - \( \text{A} \) pairs with \( \text{T} \) - \( \text{T} \) pairs with \( \text{A} \) - \( \text{C} \) pairs with \( \text{G} \) - \( \text{G} \) pairs with \( \text{C} \) - \( \text{G} \) pairs with \( \text{C} \) - \( \text{C} \) pairs with \( \text{G} \) Thus the complementary strand is: \[ \text{T A G C C G} \] --- ### Step 4: Match with the Given Options The complementary strand computed is **TAGCCG**, which corresponds to the option: \[ \textbf{TAGCCG} \] --- ### Final Answer The complementary strand of the DNA sequence ATCGGC is **TAGCCG**.