The phrase "a group of molecules" is correct and usable in written English.
It can be used in scientific contexts, particularly in chemistry or biology, to refer to multiple molecules that are interacting or being studied together.
Example: "In this experiment, we will analyze a group of molecules to determine their chemical properties and interactions."
Alternatives: "a collection of molecules" or "a cluster of molecules."
Each of these families contains a group of molecules that resemble one another in both structure and function.
This regulates the metabolism of a group of molecules called long-chain polyunsaturated fatty acids.
The T-cell receptor is associated with a group of molecules called the CD3 complex, or simply CD3, which is also necessary for T-cell activation.
This cell-surface protein is the product of one of a group of molecules encoded by the genes of the major histocompatibility complex (MHC).
A supramolecule is a group of molecules that act as a single molecule able to perform a specific set of functions.
The membrane of the red cell has on its surface a group of molecules that confer blood group specificity (i.e., that differentiate blood cells into groups).
Cate directs the Center for RNA Systems Biology, a National Institutes of Health-funded group developing new tools to study RNA, a group of molecules increasingly recognized as key regulators of the cell.
I make progress but the spoiler is a move that requires squatting low and stretching my right leg out until the tip of my toe settles on a group of molecules that Ivan swears are big enough for me to balance on.
Increases in bone formation have been demonstrated in mice and rats treated with statins, a group of molecules that increase the production of bone morphogenetic proteins-2 (byP2) by stimulating its promoter.
These modifications have been pursued by using a group of molecules that can be conjugated to the drug molecule to alter the cell permeability of the drug or mixed with the drug molecule to alter the epithelial barrier function, in order to achieve the effective drug permeation.
What would constitute bulletproof empirical evidence to settle the debate?To me the holy grail of origin-of-life research would be to find, and demonstrate, a simple, geochemically plausible way of creating a group of molecules that spontaneously organise themselves to make its own copies.
