WHICH IS /ARE COMPLEMENTARY TO 5' AGGCUAAC 3' 1. 5'TCCGATTG3' 2. 3'TCCGATTC5' 3. 5'CTTAGCCT3' 4.3'TAAGCTTA5' 5. 3'TCCGATTG5' AND 5'GTTAGCCT3'
5 is the correct answer.
Since the strands are anti-parallel, we match the 3' and 5' ends, and vice versa.
5'AGGCUAAC 3'
matches perfectly (A-T and C-G) with
3'TCCGATTG5'
The U in the original strand is probably a typo and should have been a T.
The other option in choice 5 is just the reverse of the same strand.
Correction: The U is present in an RNA strand that matches up with A, so it is not a typo.
To find the complementary sequence to 5' AGGCUAAC 3', we need to identify the base pairs that would pair up with each base.
The complementary base pairing rules are:
- Adenine (A) pairs with Thymine (T)
- Guanine (G) pairs with Cytosine (C)
Let's go through each option to determine which ones are complementary:
1. 5' TCCGATTG 3'
This sequence is complementary because:
- T pairs with A
- C pairs with G
- C pairs with G
- G pairs with C
- A pairs with T
- T pairs with A
- T pairs with A
- G pairs with C
So, the complementary sequence is: 5' TCCGATTG 3'
2. 3' TCCGATTC 5'
This sequence is not complementary because the direction is reversed (3' to 5' instead of 5' to 3').
3. 5' CTTAGCCT 3'
This sequence is not complementary because:
- C pairs with G
- T pairs with A
- T pairs with A
- A pairs with T
- G pairs with C
- C pairs with G
- C pairs with G
- T pairs with A
So, the complementary sequence is not 5' CTTAGCCT 3'.
4. 3' TAAGCTTA 5'
This sequence is complementary because:
- T pairs with A
- A pairs with T
- A pairs with T
- G pairs with C
- C pairs with G
- T pairs with A
- T pairs with A
- A pairs with T
So, the complementary sequence is: 3' TAAGCTTA 5'
5. 3' TCCGATTG 5'
This sequence is not complementary because the direction is reversed (3' to 5' instead of 5' to 3').
Based on the above analysis, the sequences that are complementary to 5' AGGCUAAC 3' are:
- 5' TCCGATTG 3'
- 3' TAAGCTTA 5'
To find the complementary sequence to a given DNA sequence, you need to remember the base-pairing rules. In DNA, adenine (A) always pairs with thymine (T), and cytosine (C) always pairs with guanine (G).
The given sequence is: 5' AGGCUAAC 3'
To find the complementary sequence, you can simply replace each base with its pairing base:
A (adenine) pairs with T (thymine)
G (guanine) pairs with C (cytosine)
C (cytosine) pairs with G (guanine)
T (thymine) pairs with A (adenine)
Now let's evaluate each answer option:
1. 5' TCCGATTG 3'
This sequence is not complementary to the given sequence because it does not follow the base-pairing rules. The corresponding base for A is T, but it is replaced by C in this option.
2. 3' TCCGATTC 5'
This sequence is complementary to the given sequence because it follows the base-pairing rules correctly. The corresponding bases for each position match.
3. 5' CTTAGCCT 3'
This sequence is not complementary to the given sequence because it does not follow the base-pairing rules. The corresponding base for T is A, but it is replaced by C in this option.
4. 3' TAAGCTTA 5'
This sequence is complementary to the given sequence because it follows the base-pairing rules correctly. The corresponding bases for each position match.
5. 3' TCCGATTG 5'
This sequence is not complementary to the given sequence because it does not follow the base-pairing rules. The corresponding base for A is T, but it is replaced by G in this option.
Based on the evaluation above, the answer options that are complementary to the given sequence are:
Option 2: 3' TCCGATTC 5'
Option 4: 3' TAAGCTTA 5'