• The Who-Ate-Whom of Terms in Bi­ol­ogy: Vi­rovory

    by Christoph — Like with the cus­to­ma­ry New Year's Eve fire­works, eve­ry year we bio­lo­gists are blessed with hi­ther­to un­known or lar­ge­ly un­com­mon sci­en­ti­fic terms. Some stick, oth­ers blaze away like said fire­works. How would you guess the term "vi­ro­vo­ry," which was ad­ded to Wi­ki­pe­dia on 29 Decem­ber 2022, will fare?

  • A Mol­e­c­u­lar Stiletto

    Pic­tures Con­sid­ered #38 by Christoph — Imag­ine you equip your stan­dard E. coli cells with a few ad­di­tional genes, con­ve­niently placed on plas­mids and un­der con­trol of in­ducible pro­mot­ers. You grow the cells and in­duce the ex­pres­sion of these ad­di­tional genes. Not long af­ter, the cy­to­plasm of the cells turns red­dish, when looked at un­der the flu­o­res­cence mi­cro­scope, due to...

  • Of Terms in Bi­ol­ogy: Ex­tru­somes

    by Elio — Ex­tru­somes are nasty mem­brane-bound struc­tures re­leased by cil­i­ates and fla­gel­lates. They come in a num­ber of va­ri­eties, the best stud­ied be­ing the tri­chocysts of para­me­cia. These can be dis­charged by the thou­sands per cell in re­sponse to phys­i­cal stim­uli, in­clud­ing when at­tacked by preda­tors. In­stead of be­ing used...

  • Life in a Big Mac

    by Merry — From the bac­te­r­ial point of view, a para­me­cium is a mi­cro­cosm of­fer­ing sev­eral tempt­ing niches for col­o­niza­tion. When you col­lect a para­me­cium from na­ture, it's likely to have hun­dreds – even thou­sands – of bac­te­r­ial en­dosym­bionts on board, in dif­fer­ent lo­ca­tions. Some will likely be in the...

  • Fine Read­ing: In the Com­pany of Cil­i­ates

    by Merry Youle — Or­gan­isms such as cil­i­ates that dine daily on bac­te­ria run the risk of get­ting an in­fec­tion. In­deed, cil­i­ates,  large com­plex cells , are host in na­ture to gazil­lion dif­fer­ent bac­te­ria that they ac­quire pri­mar­ily through phago­cy­to­sis at their "mouth." Res­i­dent bac­te­ria are gen­er­ally termed sym­bionts even though...