Question

match each section of DNA to the complementary section on the opposite strand, assume that the sections of DNA are oriented correctly so that you could place them one above the other.

ATGG
GCCG
CCAT
TTGC

1. AACG
2. GGTA
3. CGGC
4. TACC

Answer 1

To match each section of DNA to the complementary section on the opposite strand, we must follow the base pairing rules: adenine (A) pairs with thymine (T), and cytosine (C) pairs with guanine (G).

Here are the complementary sequences for each given DNA strand:

1. For **ATGG**:
- Complementary sequence: TACCT (since A pairs with T, T pairs with A, G pairs with C)
- None of the options match this, so **ATGG does not match** any provided options.

2. For **GCCG**:
- Complementary sequence: CGGC (since G pairs with C, C pairs with G)
- This matches **option 3: CGGC**.

3. For **CCAT**:
- Complementary sequence: GGTA (since C pairs with G, A pairs with T)
- This matches **option 2: GGTA**.

4. For **TTGC**:
- Complementary sequence: AACG (since T pairs with A, G pairs with C)
- This matches **option 1: AACG**.

Now, we can summarize the matches:

- **ATGG**: No match
- **GCCG**: **3. CGGC**
- **CCAT**: **2. GGTA**
- **TTGC**: **1. AACG**

Thus, the pairs are:

- GCCG -> CGGC (3)
- CCAT -> GGTA (2)
- TTGC -> AACG (1)