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.

A holiday isnt a holiday without plenty of freedom and fun.

I have never felt any ethnic connection between the Greeks and me other than how hairy I am.

If you spend your whole life waiting for the storm, you'll never enjoy the sunshine.

I travel not to go anywhere, but to go. I travel for travel's sake. The great affair is to move.

We rejoice in our sufferings because we know that suffering produces perseverance; perseverance, character; and character, hope.

I do have to step out and take time to let people know that I'm Ronnie Dunn and not Brooks and Dunn.

A mask of gold hides all deformities.

No species is more important than others.

When I get in the studio the idea is just to work and bang out as many as I can.

If you take each step, as if it was your last. You would appreciate the world in all its glory and bask in the glory of god for in his wisdom he created us and the universe all around us.

Most of my writing takes place at a cramped desk in a cramped apartment, so whenever I get to write on a train or make notes on a road trip, it has an entirely different cadence. And I can remember specific writing sessions while on a train through beautiful countryside in a way I can remember almost nothing else.

I was ordered not to go out to Abu Ghraib after dark early on, because Abu Ghraib was extremely dangerous.

He's a very strange guy, my father. I can't get mad at him because he's so adorable.

Practical wisdom is only to be learned in the school of experience. Precepts and instruction are useful so far as they go, but, without the discipline of real life, they remain of the nature of theory only.

Remember, if a man needs to pull away like a rubber band, when he returns he will be back with a lot more love. Then he can listen. This is the best time to initiate conversation.

I just think when you read something that's magnetic that pulls you into it or resonates with you, whatever that may be, that's always a positive thing. And you never know what that's going to be.

Certainly I was a bully. I'm not ashamed of it at all. The hostility of the establishment to what you were able to do in the Forties and Fifties was very strong. Sometimes you have to fight against your society.

It's the idea that when you say 'actress', people think of an airy, floaty, no-brain person, which of course you can't be if you are an actor. It is an unfortunate word, which is why, for a time, I hung on to 'actor', because it just seemed more workmanlike, you know, like you say 'woman doctor' not 'doctoress'.

My pilot's license. I'm proud of that.

I would love to be able to serve in office in some capacity with Romney as president.

All political institutions will end sooner or later. The question is when and how.

In my books I try to tell a good story, not give messages.

As an East Asian looking at America, I find attractive and unattractive features. I like, for example, the free, easy and open relations between people regardless of social status, ethnicity or religion.

We got to know the competition very well. In the '50s popcorn made a big growth in sales. Our main push was to produce the best quality and sell in quality retail outlets.