I lisosomi sono vescicole che racchiudono gli enzimi coinvolti nelle reazioni di idrolisi, i proteasomi sono specializzati nel demolire proteine per riciclare amminoacidi, i perossisomi contengono diversi enzimi ossidativi.

I batteri sono cellule procariote; queste cellule sono prive di membrana cellulare e possono vivere anche negli ambienti più estremi.

La parte fluida del citoplasma, il citosol, è una soluzione di ioni, piccole molecole e grosse proteine; nelle cellule eucariote metà del citoplasma è costituito da piccole strutture chiamate organuli.

Tutte le cellule sono rivestite da una membrana cellulare, formata da un doppio strato fosfolipidico; le cellule vegetali hanno anche una parete rigida costituita da cellulosa.

Le cellule Eucariote: hanno dimensioni limitate per favorire il rapporto superficie/volume e rendere le cellule metabolicamente attive.

Il nucleo, avvolto da una doppia membrana dotata di pori per poter comunicare col citoplasma, contiene il DNA sotto forma di cromatina e un nucleolo che assembla i ribosomi.

Il citoscheletro mantiene la forma della cellula, fissa gli organuli, dirige il traffico interno e le consente di muoversi; è formato da filamenti di actina, microtubuli e filamenti intermedi.

Ciglia e flagelli sono formati da filamenti proteici; servono per il movimento.

Il vacuolo è una cavità citoplasmatica contenente acqua e soluti, delimitata da una membrana; le vescicole con funzione di trasporto, sono piccole e hanno una struttura uguale al vacuolo

Il reticolo endoplasmatico è costituito da un sistema di membrane; il reticolo rugoso ricoperto di ribosomi da ribosomi sintetizza le proteine e il reticolo liscio sintetizza soppratutto lipidi.

I cloroplasti svolgono la fotosintesi clorofialiana ; nei mitocondri, invece, avviene la respirazione cellullare.

I ribosomi sono sono siti presso cui vengono assemblati gli amminoacidi per la sintesi delle proteine.

L'apparato di golgi è un centro di elaborazione di molecole complesse che vengono poi avvolte in vescicole e trattenute nella cellula stessa o esportate.

Massage is a luxury you can't afford to miss!

When I went to medical school, the term 'digital' applied only to rectal exams.

When my grandfather died, I started adopting some of his accents, to sort of remind myself of him. A homage. He was a war hero, and he was really great with his hands.

Next to my husband, and along with Marlon Brando, I think that Yves Montand is the most attractive man I've ever met.

I've accomplished enough with the music that I haven't had to go out there and do other things to over-saturate.

It's the people who don't recognize the racism within themselves that can be the most damaging because they don't see it.

All charming people have something to conceal, usually their total dependence on the appreciation of others.

The exercise of power is determined by thousands of interactions between the world of the powerful and that of the powerless, all the more so because these worlds are never divided by a sharp line: everyone has a small part of himself in both.

Pool is a fascinating game, but there is always the added factor of the money that really makes it hot.

If I got a football scholarship, I was going to be a football player.

I spend a lot of time in a sort of free state when I'm writing in the beginning and sketching.

Trinidad's language is a fusion of English, African, and French, and so we have our own words and even our own dictionary. Steupse is a common local word, and it's the onomatopoeic word for the sound people make to show disapproval, or to show they are vexed, when they suck their teeth together.

When you've written 10 books and have six on the New York Times best-seller list - and four have been No. 1 - I think you have a right to be a member of Congress.

Healing begins where the wound was made.

I don't remember the first half of my life. All I say is a happy childhood is the worst possible preparation for life.

Keep your morale high, in spite of setbacks. At the end you are bound to succeed.

I remember I'd come home from fifth, sixth grade, and I'd watch 'Saved by the Bell' and be like, 'I hope my high school experience is like that.' And it totally wasn't. It sucked.

Well, the tough thing for them is that the Republican primary is pretty far over to the right, just as the Democratic primary is further over to the left than the average voter in each party.

I would love to work with Sir Anthony Hopkins. How and why that would happen in a comedy I'm not sure - why he would be dragged over to my side, or I'd be be dragged over to his side.

To be the outsider is actually a great thing in England.

Chashkin Sar was virgin, and we climbed it for the first time, and afterwards, the people renamed it as Samina Baig.

A man's 'original and natural right' to make all contracts that are 'intrinsically obligatory,' and to coerce the fulfillment of them, is one of the most valuable and indispensable of all human possessions.

There is an intimacy about the Opry Theater that gives an entertainer a special charge.

Observation capitalizes inspiration.