The phrase "a marking system that" is correct and usable in written English.
You can use it when describing a specific type of system used for marking or grading purposes, often in educational or evaluative contexts.
Example: "The teacher implemented a marking system that allows for more detailed feedback on student assignments."
Alternatives: "a grading system that" or "an assessment system that".
The modifications of specific residues within the histone N-termini serve as a marking system that contributes to the establishment and maintenance of distinct chromatin structures [1], [2], [3], [4].
While it has been reported that heat shock can alter ISC division rates measured by lineage labeling (Strand and Micchelli, 2011), we minimized these effects by using a single brief heat shock and a marking system that lacks GAL4.
have emerged as key regulatory mechanisms of transcriptional regulation and may serve as an epigenetic marking system that is responsible for establishing and maintaining the heritable programs of gene expression during cellular differentiation and organism development [2] [4].
The histone code hypothesis, originally proposed a decade ago [ 1], suggests that specific combinations of histone post-translational modifications (PTMs) constitute an epigenetic marking system that determines distinct transcriptional and functional outputs of eukaryotic genomes.
Our experiments used a simple, reliable marking system that does not involve GAL4, has zero-background and is inactive in postmitotic cells; we applied only a single brief heat shock.
[ 1] These Histone modifications could act as marking system that is responsible for establishing and maintaining programs of gene expression during cellular differentiation.
"I was told this was perfectly normal and it was an indication that there were thousands of responses unmarked". She claims she could see from the electronic marking system that 75% of responses for that English paper were not yet marked at that stage.
Most of the claims that heat shock induces artifacts (e.g., Strand and Micchelli, 2011) are based on cell marking systems that involve the GAL4 system, which is itself affected by heat.
They are, indeed, a marking system, and one that is designed to inform interested parties.
Bowing to criticism that too many students were receiving A's, the Harvard University faculty voted yesterday to overturn at least a generation of tradition by adopting a marking system more like that of most American colleges.
The MCQ uses a negative marking system such that candidates are awarded one mark for a correct answer, minus one mark for an incorrect answer and no marks if the question is not answered.
