SB B/B Question -- DNA/RNA strands - Complement, hybridize, etc?

[arc5005]

My exam is on Saturday, and for some reason I had these concepts down awhile ago, but now I'm just getting them mixed up. What is the difference between these examples and other common examples when trying to match up DNA sequences whether it is "complementary," "reverse complementary," "identical," or "hybridizing"?

Example 1:

-------------------------------------------------

Example 2:

During DNA replication, the base sequence 5'-pApTpApGpApC-3' would give rise to which of these completely base sequnces?

A. 3'-UpApUpCpUpGp-5'
B. 5'-pTpApTpCpTpG-3'
C. 5'-pGpTpCpTpApT-3'
D. 3'-TpApTpGpUpGp-5'


C) 5'-pGpTpCpTpApT-3'

Since DNA is antiparallel, the completely strand must be: 5'-pGpTpCpTpApT-3'


------------------------

Example 3:

---

Members don't see this ad.

 

[arc5005]

Example 3:

Which of the following nucleotide sequences can best hybridize with the mRNA sequence 5'-GCUAGUA-3'?
A. 5'-CGAUCAU-3'
B. 5'-CGATCAT-3'
C. 3'-CGATCAT-5'
D. 3'-CGAUCAU-5'



D) 3'-CGAUCAU-5'

The answer here is D, because we are talking about which RNA strand can "hybridize" with the mRNA sequence provided...