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A researcher is investigating what factors upregulate the transcription factor Barx1? What does "upregulate" mean, in this context?
a. It means that more mRNA copies of Barx1 are being created and/or more Barx 1 protein is being translated in cells.
b. It means that fewer mRNA copies of Barx1 are being created and/or fewer Barx 1 protein is being translated in cells.
c. It means that Barx1 is being degraded at a faster rate in the cells.
d. It means that Barx1 proteins are being deactivated at a faster rate.