Here are the answers to this:
1. AUG - GGG - CCA- GUU -GAA- AAA - AUU- GCA - GAA - CUU - UGC
2. AUG - GGG - CCA - GUU - GAA - AAA - AUU - GCA - GAA - CUU - UGA
3. TAC - CCC - GGT - GAA - CTT - TTT - TAA - CGT - CTT - GAA - ACT
Here's something to remember:
The top strand is the coding strand, then the bottom serves as the template strand. So this is where the RNA will get the information. So we get the complementary strand first then match the RNA sequence.
DNA to complementary DNA strand
BASE PAIRING:
G ⇒ C ; C⇒G
A ⇒ T ; T⇒A
Complementary DNA to mRNA
BASE PAIRING:
G ⇒ C ; C⇒G
A ⇒ U ; T⇒A
The new Bottom strand
BASE PAIRING:
G ⇒ C ; C⇒G
A ⇒ T ; U⇒A
If you remember the base pairings, you might be able to do it on your own next time :)
ORIGINAL TOP STRAND
ATG - GGG - CCA - GTT - GAA - AAA - ATT - GCA - GAA -CTT- TGA
Get the complementary strand
TAC - CCC - GGT - CAA - CTT - TTT - TAA - CGT - CTT -GAA - ACG
Then you get the mRNA strand
AUG - GGG - CCA- GUU -GAA- AAA - AUU- GCA - GAA - CUU - UGC
ORIGINAL TOP STRAND
ATG – GGG – CCA – GTT – GAA – AAA – ATT – GCA – GAA – CTT – TGA
Get the complementary strand
TAC - CCC - GGT - CAA - CTT - TTT - TAA - CGT - CTT - GAA - ACT
Then get the mRNA strand
AUG - GGG - CCA - GUU - GAA - AAA - AUU - GCA - GAA - CUU - UGA
New bottom strand
TAC - CCC - GGT - GAA - CTT - TTT - TAA - CGT - CTT - GAA - ACT