Question at position 5 For the DNA sequence 3’ ACACAGTGT 5’ the strand that fully binds (complementary base pairing) is3’ TGTGTCACA 5’ 5’ TGTGTCACA 3’3’ TGTGACACA 5’5’ ACACAGTGT 3’ 5’ TGTGACACA 3’

Question

Question at position 5  For the DNA sequence 3’ ACACAGTGT 5’ the strand that fully binds (complementary base pairing) is3’ TGTGTCACA 5’ 5’ TGTGTCACA 3’3’ TGTGACACA 5’5’ ACACAGTGT 3’ 5’ TGTGACACA 3’

BlackTom AI · Accepted Answer

First, restating the given information: the DNA sequence provided is 3’ ACACAGTGT 5’. The task is to identify the strand that fully binds via complementary base pairing.
Option 1: 3’ TGTGTCACA 5’. This would run in the same 3’ to 5’ orientation as the original strand, which cannot be the complement because complementary strands are antiparallel; bases would not align properly to form a stable double helix if both strands run in the same direction.
Option 2: 5’ TGTGTCACA 3’. This choice is antiparallel to the original sequence (the 5’ end of the complement aligns with the 3’ end of the template). Pairing the bases: A pairs with T, C with G, etc. Reading the original 3’ to 5’ direction A C A C A G T G T, its complement in the opposite direction is T G T G T C A C A, which corresponds to this option. This is the correct pairing pattern for a fully complementary strand.
Option 3: 3’ TGTGACACA 5’. This strand would not provide correct base pairs with the template because the sequence differs at positions where A should pair with T and so on; this would produce mismatches if attempted as a complement.
Option 4: 5’ ACACAGTGT 3’. This is the exact same sequence as the template but with opposite orientation; however, a complement must be the reverse-complement, not the same sequence mirrored in orientation. It does not satisfy proper base-pairing rules for the complementary strand.
Option 5: 5’ TGTGACACA 3’. This sequence has substitutions that disrupt the expected base-pairing pattern (for example, where a C would pair with G, or an A with T). It would not form a proper complementary strand to the given template.
Taken together, only Option 2 provides the correct reverse-complement sequence that pairs antiparallel to the original strand, satisfying canonical base-pairing (A=T, C=G) across all positions.

Question at position 5 For the DNA sequence 3’ ACACAGTGT 5’ the strand that fully binds (complementary base pairing) is3’ TGTGTCACA 5’ 5’ TGTGTCACA 3’3’ TGTGACACA 5’5’ ACACAGTGT 3’ 5’ TGTGACACA 3’

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