A) a-ketoglutaric acid and NAD+
Resin identification coding
system
Resin identification coding
system is introduced as a means of helping consumers and recyclers to identify
the type of plastic resin from which a bottle or a container is produced from.
Manufacturers follow the coding system by placing a number or SPI code on each
plastic product and the code are usually molded into the base of the products. For
example, plastics marked with an SPI Code of 1 are made with polyethylene
terephthalate (PET).
Spores are highly resistant structures formed in response to adverse conditions and once formed they have no metabolic activity and can remain dormant for years.
Two kinds of organisms form spores, namely bacteria and fungi.
Bacteria form spores basically for survival. Fungi on the other hand form spores for reproduction and these are either sexual or asexual in nature.
Examples of fungal sexual spores are zygospores, ascospores and basidiospores. Examples of fungal asexual spores (collectively known as conidia) are arthrospores, chlamydospores and blastospores.