The operating system of life - George Zaidan and Charles Morton

生命的操作系统 - 乔治•载旦,查尔斯•摩尔顿

411,248 views

2013-11-11 ・ TED-Ed


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The operating system of life - George Zaidan and Charles Morton

生命的操作系统 - 乔治•载旦,查尔斯•摩尔顿

411,248 views ・ 2013-11-11

TED-Ed


请双击下面的英文字幕来播放视频。

翻译人员: jie chen 校对人员: Xuwen Zhu
00:07
Every chicken was once an egg,
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小鸡的前身是蛋,
00:09
every oak tree an acorn,
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橡树的前身是橡子,
00:11
every frog a tadpole.
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青蛙前身是蝌蚪。
00:13
The patch of mold on that old piece of bread
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你家冰箱深处
00:15
in the back of your fridge,
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那片放了很久的面包上的霉菌
00:16
not so long ago that was one, solitary cell.
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所有这些的前身,都曾是一个单细胞。
00:19
Even you were once but a gleam
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就连你自己,最初
00:21
in your parents' eyes.
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也不过是你父母投向彼此的一个深情注视。
00:24
All these organisms share
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所有一切有机物
00:26
the same basic goal:
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都有一个共同的目标:
00:27
to perpetuate their own existence.
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让自己长存下去。
00:31
All lifeforms that we've discovered so far
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一切已知的生命体,
00:33
stay alive by using
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其存在方式从本质上说,
00:35
basically the same rules, materials, and machinery.
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都采用同样的规则,原料和运行机制。
00:38
Imagine a factory full of robots.
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请想象一个全是机器人的工厂。
00:41
These robots have two missions:
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这些机器人有两种使命:
00:43
one, keep the factory running,
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第一个是保持工厂运作
00:44
and two, when the time is right,
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第二个则是在时机成熟时,
00:45
set up an entirely new factory.
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建立一个全新的工厂。
00:49
To do those things,
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00:49
they need assembly instructions,
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为了达成这样的目标,
他们需要把指令,
00:51
raw materials,
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原材料,
00:52
plenty of energy,
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大量的能量,
00:54
a few rules about when to work normally,
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还有一些规则结合起来,这些规则是:何时正常工作,
00:56
when to work quickly,
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何时快速工作,
00:57
or when to stop,
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或者何时停止工作,
00:58
and some exchange currencies
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以及,如何获得一些奖励货币,
00:59
because even robots need to get paid.
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因为,即使是机器人,也应该有报酬。
01:02
Each factory has a high security office with blueprints
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每间工厂里都有绝密办公室,里面藏着各种蓝图,
01:05
for all the possible factory configurations
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描绘所有工厂结构
01:08
and complete sets of instructions
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以及整套整套的指令,
01:09
to make all the different types of robots
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其目标是制造工厂所需的
01:11
a factory could ever need.
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各类机器人。
01:13
Special robots photocopy these instructions
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特种机器人复制并发出
01:15
and send them off
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这些指令,
01:16
to help make the building blocks of more robots.
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用于建立更多的机器人原件。
01:19
Their colleagues assemble those parts
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他们的同事则组装起这些元件,
01:21
into still more robots,
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制造出更多的机器人,
01:23
which are transported
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这些机器人被运送到
01:24
to the right location in the factory
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工厂里相应的部门,
01:25
and given the tools they need to start working.
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然后他们拿起工具,开始工作。
01:28
Every robot draws energy
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每一个机器人都会
01:30
from the central power plant,
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从中央供电单元获取能量,
01:32
a giant furnace that can burn regular fuel
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那是一个巨型熔炉,不但消耗常规燃料,
01:34
but also scrap materials
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还可能在常规燃料不足的情况下,
01:36
if not enough regular fuel is available.
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燃烧废旧原料。
01:39
Certain zones in the factory
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工厂的某些部门
01:41
have harsher working conditions,
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工作条件更艰辛,
01:42
so these areas are walled off.
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因此这些区块都会筑墙防护。
01:44
But the robots inside can at least communicate
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但这些墙内机器人
01:46
with the rest of the factory
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至少可以和工厂的其他部门沟通,
01:48
through specialized portals
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他们采用直接嵌入墙体的
01:49
embedded directly into the walls.
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特别接口。
01:52
And as you've probably figured out,
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现在,你也许意识到了,
01:53
what we're describing here
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我们向你描述的,
01:55
is a cell.
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正是一个细胞。
01:56
The high security office is the nucleus.
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绝密办公室是细胞核。
01:59
It stores the blueprints and instructions
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细胞核存放设计规划蓝图和指令集,
02:00
as deoxyribonucleic acid, or DNA.
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譬如脱氧核糖核酸也就是俗称的DNA。
02:03
The photocopied instructions are RNA.
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被复制下来的指令是RNA。
02:06
The robots themselves are mostly proteins
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这些机器人本身来说,多数就是
02:08
built from amino acids,
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氨基酸组成的蛋白质,
02:09
but they'll often use special tools
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但他们往往采用特殊工具,
02:11
that are, or are derived from,
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可以说,这些工具是或者源于
02:13
vitamins and minerals.
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维生素和矿物质。
02:15
The walls between factory zones
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工厂各部门之间的高墙,
02:16
and around the factory itself
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还有包围工厂的围墙,
02:18
are mostly made up of lipids,
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多数由脂类组成,
02:20
a.k.a. fats.
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也就是俗称的脂肪。
02:22
In most organisms,
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在大多数有机物体内,
02:23
the primary fuel source are sugars,
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主要燃料是糖类,
02:25
but in a pinch,
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但在必要时,
02:26
fats and proteins can be broken down
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身体的熔炉也会分解掉脂肪和蛋白质
02:27
and burned in the furnace as well.
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将其化为燃料。
02:30
The portals are membrane proteins
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接口则是膜蛋白,
02:32
which allow very specific materials and information
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它们使那些特殊原材料和信息
02:34
to pass through the walls at the right times.
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得以适时通过高墙创造便利。
02:37
Many interactions between robot proteins
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许多在机器人蛋白质之间发生的互动活动,
02:39
require some kind of push,
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都需要某种动机,
02:41
think robot minimum wage.
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就像要付给机器人最低工资一样。
02:43
A few small but crucial forms of money
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一笔数量虽小但极为关键的货币
02:46
are transferred between proteins
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在蛋白质之间转手
02:47
to provide this push.
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用以推动机器人工作。
02:49
Electrons, protons, oxygen, and phosphate groups
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电子,质子,氧气以及各种磷酸盐
02:52
are the main chemical currencies,
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就是主要化学货币,
02:54
and they're kept in small molecular wallets
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它们要么被存放在小小的分子钱包里
02:56
or larger tote bags to keep them safe.
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要么是大手袋,总之很安全。
02:59
This is biochemistry,
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这就是生物化学,
03:01
the study of how every part of the factory
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这门学问研究工厂里每个元件
03:03
interacts to keep your life running smoothly
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如何互动从而让你的生命运行无碍,
03:06
in the face of extreme challenges.
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无论面临何种极端的挑战。
03:08
Maybe there's too much fuel;
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有时候会有过多的燃料;
03:10
your body will store the excess as glycogen or fat.
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你的身体就会把多余的燃料作为糖元或脂肪储存起来。
03:13
Maybe there's not enough;
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有时候燃料不足;
03:14
your body will use up those energy reserves.
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你的身体就会动用能量储备。
03:17
Maybe a virus or bacteria tries to invade;
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有时候某种病毒或者细菌正在门外蠢蠢欲动;
03:19
your body will mobilize the immune system.
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你的身体则调动起免疫系统。
03:22
Maybe you touched something hot or sharp;
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有时候你不小心碰到了滚烫或者尖锐的东西;
03:24
your nerves will let you know so you can stop.
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你的神经系统会通知你立即停下。
03:26
Maybe it's time to create a new cell
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哟时候则是分化出新细胞
03:29
or a new person.
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或者新的人类的时候了。
03:31
Amazingly, oak trees, chickens, frogs,
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多么神奇:橡树,鸡,青蛙,
03:34
and, yes, even you
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对了还有你,
03:36
share so many of the same
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都有那么多共同点
03:37
basic robot and factory designs
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它们的基础机器人和工厂设计
03:39
that biochemists can learn a lot
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就是生物化学家的知识源头,
03:41
about all of them
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通过它们,我们可以在同一时间
03:42
all at the same time.
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了解到这一切知识。
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