With molecule W was that referring to Pre mRNA or mRNA? I thought since it was asking the initial transfer I gave the steps of transcription rather than pre mRNA modifcation
I suspect they were referring to both transcription and splicing to be honest, as the answers state
Two marks for transcription, 1 for post-transcriptional modification
For 7a, I said that their gene loci are not close together. Would this be correct? I was taught that linked genes are very close together on the chromosome.
You're technically correct. Linked genes, as you've stated, are only those that are close together on the same chromosome. If they're more than 50 map units apart (a measure of gene size) then they are not linked, even if they're on the same chromosome.
Unfortunately, VCE Biology doesn't subscribe to this more nuanced definition of linkage and, as thushan has suggested, would likely only reward marks for stating that the genes are on the same chromosome.