Biochemistry C 785 Readiness
Check II 2020 – Western
Governors University |
Biochemistry C785 Readiness
Check
{A Grade}
Biochemistry Readiness
... [Show More] Check II
Points:
44/67
1
Choose the correct coding strand (non-template) from this template
(non-coding) DNA: 5' ACG GTA 3'
(1/1 Points)
5' UAC CGU 3'
3' UAC CGU 5'
3' TAC CGT 5'
5' TAC CGT 3'
Correct! First, note that we are asked for a template/non-coding strand of DNA. DNA
uses the base T where RNA uses the base U. Therefore, we can eliminate the two
answers containing U because they must be RNA and we want DNA. Then, recall that
any strands of nucleic acid that bind to each other (base pairing; A-T/U or C-G) must be
each be running in opposite directions (antiparallel; a strand running 5'-->3 is bound to
a strand running 3'-->5'). If any two strands of nucleic acid (for example 2 strands of
DNA in a double helix) are complementary (A-T/U or C-G), the two strands must run IN
OPPOSITE directions, 5'--->3' and 3'--->5'.
2
If one strand of chromosome 2 has a DNA sequence that consists of
this: 5’ AAG CGG TAC GTA 3’, what will be the composition of the
complementary DNA strand? (Select all that apply)
(1/1 Points)
5' TTC GCC ATG CAT 3'
3' TTC GCC ATG CAT 5'
Correct! All complementary base pairing must be antiparallel. The strand that is
complementary to 5’ AAG CGG TAC GTA 3’ is 3' TTC GCC ATG CAT 5'. If we simply 'flip'
the sequence, we get 5' TAC GTA CCG CTT 3'. Thus, both of these are the correct
answers. 3' TTC GCC ATG CAT 5' 3' TTC GCC ATG CAT 5' 5’ AAG CGG TAC GTA 3’ 3' AAG
CGG TAC GTA 5' is similar to the original sequence (5’ AAG CGG TAC GTA 3’), but its 5'
and 3' ends are swapped.
5' TAC GTA CCG CTT 3'
Correct! All complementary base pairing must be antiparallel. The strand that is
complementary to 5’ AAG CGG TAC GTA 3’ is 3' TTC GCC ATG CAT 5'. If we simply 'flip'
the sequence, we get 5' TAC GTA CCG CTT 3'. Thus, both of these are the correct
answers. 3' TTC GCC ATG CAT 5' 3' TTC GCC ATG CAT 5' 5’ AAG CGG TAC GTA 3’ 3' AAG
CGG TAC GTA 5' is similar to the original sequence (5’ AAG CGG TAC GTA 3’), but its 5'
and 3' ends are swapped.
3' AAG CGG TAC GTA 5'
5’ ATG TAC GGC GAA 3 [Show Less]