Lacking Last Letter

[TimeSpaceLightForce]

A basic DNA code-like sequencing below
has a lacking last letter : What is it?

C T T T C G A
---------------------------
A A G C G G T T
---------------------------
G T A C T T A C
---------------------------
G C T G A G C G
--------------------------
C A C A C A A _
--------------------------

[BobbyGo]

The last letter is A.

Each set of letters correspond to numbers in base 4.

T = 0

A = 1

G = 2

C = 3

When converted to base ten, the pattern is as follows:

12345

23456

34567

45678

56789

The last pattern in base 4 is 31313111, which is represented by C A C A C A A A.

Edited March 20, 2013 by BobbyGo

[Krishna Kutty]

Is this really a logic puzzle?I mean, any sequence sort of thing?Bcoz i can't find any .

[TimeSpaceLightForce]

Is this really a logic puzzle?I mean, any sequence sort of thing?Bcoz i can't find any .

hi KK, of course you can solve this sequence puzzle logically

[Krishna Kutty]

Is this really a logic puzzle?I mean, any sequence sort of thing?Bcoz i can't find any .

hi KK, of course you can solve this sequence puzzle logically

No idea!The first five seem to be complementary to the next five.but after that...???Any clue?

[TimeSpaceLightForce]

Is this really a logic puzzle?I mean, any sequence sort of thing?Bcoz i can't find any .

hi KK, of course you can solve this sequence puzzle logically

No idea!The first five seem to be complementary to the next five.but after that...???Any clue?

Notice these has nothing to do with biochemistry?Just look like it. Obviously there is no pattern at all. They cant represent words.

[wolfgang]

Why there are only 7 letters in the 1st row?

[TimeSpaceLightForce]

Why there are only 7 letters in the 1st row?

exactly because it is the start of sequence

[TimeSpaceLightForce]

The last letter is A. Yes it is

Each set of letters correspond to numbers in base 4.

OP say "basic"

number system doesnt begin in 0

and since ascending in sequence ,you got the key here

T = 0

A = 1

G = 2

C = 3

When converted to base ten, the pattern is as follows:

Internet converter base 4 to base10 is easier to use

12345

23456

34567

45678

56789

The last pattern in base 4 is 31313111, which is represented by C A C A C A A A. Good solving!