This diagram depicts the chemical structure of pyrimidine, a six-membered aromatic ring with two nitrogen atoms at positions 1 and 3 (highlighted in blue). The remaining positions are occupied by ...

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), identified as the causative agent of the COVID-19 (coronavirus disease 2019) pandemic, was first detected in Wuhan, China late December ...

During germination and early growth of castor bean (Ricinus communis), all cellular constituents of the endosperm are eventually transferred to the growing embryo. The present results bear on the ...

Laboratory experiments with cancer cells reveal two ways in which tumors evade drugs designed to starve and kill them, a new study shows. Although chemotherapies successfully treat cancers and extend ...

This is a preview. Log in through your library . Abstract Ultraviolet radiation in sunlight damages DNA in plants, but little is understood about the types, lesion capacity, and coordination of repair ...