So, since it’s been quite a while since we’ve done a post on cell biology, I thought that I would pick up where I left off last time, today. In my last post that was made over a month ago on the subject, I was going over the universal features of all cells, per Alberts et al. The seventh in this series is the following:
The point that Alberts et al. make here is fairly straightforward. All cells make DNA, RNA, and protein. Thus, they all using similar small molecules in similar processes. Small molecules including simple sugars, nucleotides, amino acids, and other universally-required substances. As an example, ATP is needed for DNA and RNA synthesis, and is also a carrier of the free energy that is required to drive many different chemical reactions that occur in the cell (Alberts et al. 2014).
It is important to note, finally, that small-molecule transfers of different cells may share similar properties in a broad aspect, but have many details that are inherently different. As an example of this, plans are a type of organism that requires very simple nutrients. Plants utilize energy from sunlight to be able to make their own small, organic molecules. It is a bit more complicated for animals, who feed on living things and in many cases are required to obtain many of their organic molecules in a ready-made form. This is a point to which we will likely return in later studies of the subject, in more detail (Alberts et al. 2014).
A prospective medical student, looking to help others succeed.