Biology

the outer covering of protein surrounding the nucleic acid of a virus

living cell in which a virus can can actively multiply or in which a virus can hide until activated by environmental stimuli

a viral reproductive cycle in which the viral DNA is added to the host cell

a viral reproductive cycle in which copies of a virus are made within a host cell, which then bursts open, releasing new viruses

an infectious protein particle similar to a virus but lacking nucleic acid

An RNA virus that reproduces by transcribing its RNA into DNA and then inserting the DNA into a cellular chromosome; an important class of c

a polymerase that catalyzes the formation of DNA using RNA as a template

single-stranded RNA molecule that has no surrounding capsids

ultramicroscopic infectious agent that replicates itself only within cells of living hosts

a form of asexual reproduction in single-celled organisms by which one cell divides into two cells of the same size

process by which some organisms, such as certain bacteria, use chemical energy to produce carbohydrates

form of sexual reproduction in which paramecia and some prokaryotes exchange genetic information, In bacteria, the direct transfer of DNA be

type of spore formed when a bacterium produces a thick internal wall that encloses its DNA and a portion of its cytoplasm

the assimilation of atmospheric nitrogen by soil bacteria and its release for plant use on the death of the bacteria

an organism that requires oxygen for cellular respiration and cannot live without it

An organism that only carries out fermentation or anaerobic respiration. Such organisms cannot use oxygen and in fact may be poisoned by it.

a poisonous substance produced during the metabolism and growth of certain microorganisms and some higher plant and animal species