The one strand of DNA has a nucleotide sequence 3' ATTCGCTAT 5', the nucleotide sequence of other DNA strand will be

Options

A. 3' TAAGCGATA 5'
B. 5' TAGCACGTA 5'
C. 5' TAGCACGTA 3'
D. 5' TAAGCGATA 3'

Answer

To find the complementary DNA strand for the given nucleotide sequence 3' ATTCGCTAT 5', we will follow these steps:

### Step 1: Identify the given strand
The given DNA strand is 3' ATTCGCTAT 5'.

### Step 2: Write the complementary base pairs
In DNA, the base pairing rules are as follows:
- Adenine (A) pairs with Thymine (T)
- Thymine (T) pairs with Adenine (A)
- Cytosine (C) pairs with Guanine (G)
- Guanine (G) pairs with Cytosine (C)

### Step 3: Determine the complementary sequence
Starting from the 3' end of the given strand and moving towards the 5' end, we will find the complementary bases:
- A (from 3' ATTCGCTAT) pairs with T
- T pairs with A
- T pairs with A
- C pairs with G
- G pairs with C
- C pairs with G
- T pairs with A
- A pairs with T

### Step 4: Write the complementary strand in the correct orientation
The complementary bases from the given strand will be:
- 5' TAAGCGATA 3'

### Final Answer
The nucleotide sequence of the complementary DNA strand is **5' TAAGCGATA 3'**.

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