QUESTION IMAGE
Question
- select the correct strand for the trna. * 1 point dna mrna trna acuagcauuaccaug ugaucguaaugguac actagcattaccatg auugguguuuugug
To find the tRNA strand, first transcribe DNA to mRNA (replace T with U, A - U, C - G, G - C), then tRNA is complementary to mRNA. DNA sequence: ACTAGCATTACCATG. mRNA: UGAUCGUAAUGGUA C (transcribing: A→U, C→G, T→A, G→C). tRNA is complementary to mRNA: A CUAGCAUUACCAUG (wait, no—wait, DNA to mRNA: DNA has A, T, C, G. mRNA uses U instead of T. So DNA: A C T A G C A T T A C C A T G. So mRNA: U G A U C G U A A U G G U A C. Then tRNA is complementary to mRNA: A C U A G C A U U A C C A U G? Wait, no, let's do step by step. DNA sequence: positions 1 - 15: A(1), C(2), T(3), A(4), G(5), C(6), A(7), T(8), T(9), A(10), C(11), C(12), A(13), T(14), G(15). Transcribe to mRNA: replace T with U, A→U, T→A, C→G, G→C. So:
- A→U? No, DNA to mRNA: DNA template strand (assuming this is the coding strand? Wait, no—DNA to mRNA: the mRNA is transcribed from DNA, so A in DNA pairs with U in mRNA, T in DNA pairs with A in mRNA, C in DNA pairs with G in mRNA, G in DNA pairs with C in mRNA. So DNA sequence: ACTAGCATTACCATG (A C T A G C A T T A C C A T G). So mRNA: U G A U C G U A A U G G U A C (let's check each base:
A (DNA) → U (mRNA)
C → G
T → A
A → U
G → C
C → G
A → U
T → A
T → A
A → U
C → G
C → G
A → U
T → A
G → C
Wait, maybe I messed up. Wait, the DNA sequence is ACTAGCATTACCATG (let's write it as a string: A C T A G C A T T A C C A T G). So each DNA base:
- A → U (mRNA)
- C → G
- T → A
- A → U
- G → C
- C → G
- A → U
- T → A
- T → A
- A → U
- C → G
- C → G
- A → U
- T → A
- G → C
So mRNA sequence: U G A U C G U A A U G G U A C (let's count: 15 bases. Now tRNA is complementary to mRNA, so tRNA anticodon pairs with mRNA codon. So mRNA: U G A U C G U A A U G G U A C. tRNA: A C U A G C A U U A C C A U G? Wait, no—complementary base pairing: U in mRNA pairs with A in tRNA, G with C, A with U, C with G. So mRNA first base U → A (tRNA), G → C, A → U, U → A, C → G, G → C, U → A, A → U, A → U, U → A, G → C, G → C, U → A, A → C? Wait, no, let's do each position:
mRNA: position 1: U → tRNA: A
position 2: G → C
position 3: A → U
position 4: U → A
position 5: C → G
position 6: G → C
position 7: U → A
position 8: A → U
position 9: A → U
position 10: U → A
position 11: G → C
position 12: G → C
position 13: U → A
position 14: A → U
position 15: C → G
Wait, this is getting confusing. Alternatively, look at the options. The first option is ACUAGCAUUACCAUG. Let's check the DNA sequence: ACTAGCATTACCATG. If we transcribe DNA to mRNA: A→U, C→G, T→A, G→C. So DNA: A C T A G C A T T A C C A T G. mRNA: U G A U C G U A A U G G U A C. Then tRNA is complementary to mRNA: A C U A G C A U U A C C A U G? Wait, the first option is ACUAGCAUUACCAUG. Let's see: ACU AGC AUU ACC AUG. Let's check the DNA sequence: ACT AGC ATT ACC ATG. So DNA: ACTAGCATTACCATG. If we take the DNA and replace T with U (but no, tRNA is complementary to mRNA, which is complementary to DNA. Wait, maybe the DNA here is the coding strand, so mRNA is same as DNA but T→U. Wait, that's a common simplification. So DNA: ACTAGCATTACCATG. mRNA: ACUAGCAUUACCAUG (replace T with U). Then tRNA is complementary to mRNA: UGAUCGUAAUGGUA C? No, no—wait, in some cases, if the DNA shown is the non - template strand (coding strand), then mRNA is same as coding strand but T→U. So DNA: ACTAGCATTACCATG (coding strand), mRNA: ACUAGCAUUACCAUG (T→U). Then tRNA is complementary to mRNA, so tRNA would be UGAUCGUAAUGGUA C? But that's not an option. Wait, the first option is ACUAGCAUUACCAUG. Wait, maybe the question has a simplification: tRNA is complementary to mRNA, and mRN…
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A. ACUAGCAUUACCAUG