Question: Now initialize a variable that will be used to store the sequence of the newly$-$synthesized strand

$($synth$).$ Since we're synthesizing this strand in the same order$/$direction as the DNA replication machinery,

should we name this variable synth$3\_5$ or synth$5\_3?$ Explain your choice.

Answer:

$[]$ ;

$\%$ The for loop below reads each base on the template strand and chooses the

$\%$ appropriate base to be added to the newly$-$synthesized strand, but it's

$\%$ incomplete. Fill in the gaps to complete the loop.

for $i=1$:seq$\_$len

template$\_$base $=$ template$3\_5($i$)$; $\%$ pull the ith base of the template

strand

row$\_$A $=$ strcmp$($template$\_$base,A$($:$,1))$; identify the row in matrix $A$

corresponding to templateBase; note that the variable row$\_$A is a boolean

vector

$\%$ Define the base added to the synthesized strand using matrix $\text{'}A\text{'}$ and

$\%$ vector 'row$\_$A$\text{'}$

synth$\_$base ;

$\%$ Store synth$\_$base in the ith element of your storage vector. You'll

$\%$ need to use the command 'char' to store the character properly.

$[]$ ;

end

Unrecognized function or variable 'template$\_$base'.

$\%$ The values saved in your storage vector are likely ASCII values. To

$\%$ convert them into a character string, again use the MATLAB command

$\%$ 'char.$\text{'}$ Example: $x=$char$(x),$ where $x$ is the name of your storage

$\%$ variable.

$[]$;

Question: Look at the result of the storage variable in your command window. Is this written in the $3^{\text{'}}{5}^{\text{'}}$ or