How an alignment scoring system needs to be defined?

a) - Match: needs to be positive ; Mismatch: needs to be positive ; Space: needs to be negative
b) - Match: needs to be positive ; Mismatch: needs to be positive or zero ; Space: needs to be negative
c) - Match: are higher than mismatches ; Mismatch: are higher than spaces ; Space: are lower than mismatches
d) - Match: are lower than mismatches ; Mismatch: needs to be positive ; Space: are negative numbers
e) - none of the above

Original idea by: Guilherme de Mello Barsoti

Regarding to data structures, what is a leaf node in a tree?

a) - It is the main node
b) - It is the first node 
c) - It is a node that does not have descendants
d) - It is a node that does not have ancestors
e) - none of the above

Original idea by: Guilherme de Mello Barsoti

1 - Which nucleic acid is not used on protein synthesis?

a) - DNA
b) - Junk DNA
c) - mRNA
d) - tRNA
e) - none of the above

Original idea by: Guilherme de Mello Barsoti