看見DNA分子（Molecular Visualizations of DNA - Original High Quality Version）
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0:00 - 0:06看見DNA分子 1. DNA的纏繞
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0:07 - 0:09在這段影片中
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0:09 - 0:13我們要來看看DNA神奇的纏繞方式
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0:13 - 0:16所以長達兩公尺的DNA分子
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0:16 - 0:19才可以塞進小小的細胞核內
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0:22 - 0:23這個過程一開始
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0:23 - 0:26DNA會纏繞在一種特殊的蛋白質上
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0:26 - 0:27叫做組織蛋白
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0:28 - 0:30纏繞好的這段DNA和組織蛋白
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0:30 - 0:32叫做核小體
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0:35 - 0:36接下來
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0:36 - 0:40核小體會纏捲成線狀
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0:40 - 0:43這條線狀結構叫做染色質
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0:49 - 0:52染色質會再繼續纏繞
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1:11 - 1:13最後形成我們所熟悉的形狀
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1:13 - 1:14也就是染色體
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1:15 - 1:18染色體可在細胞分裂時的細胞核內看見
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1:21 - 1:23染色體並不是隨時看得見
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1:24 - 1:26只有在細胞分裂的階段
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1:26 - 1:28當成對的DNA必須分開時
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1:28 - 1:31染色體才會形成
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1:43 - 1:472. DNA的複製
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1:50 - 1:51根據分子研究的結果
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1:51 - 1:53再以電腦動畫進行模擬
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1:53 - 1:55我們終於可以看見
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1:55 - 1:58細胞內的DNA怎麼進行複製
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1:59 - 2:01你現在看到的
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2:01 - 2:04就是細胞內神奇的迷你生化組裝機器
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2:04 - 2:06這部機器會把DNA雙螺旋分開
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2:06 - 2:10快速生產出兩條DNA各自的複本
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2:12 - 2:13被複製的DNA
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2:13 - 2:15從畫面的左下角進入生產線
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2:17 - 2:19正在旋轉的藍色小機器
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2:19 - 2:21叫做解旋酶
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2:22 - 2:25解旋酶和噴射引擎一樣快速旋轉DNA
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2:25 - 2:28把DNA雙螺旋解開成兩條單股
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2:29 - 2:32其中一條單股DNA可持續複製出來
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2:32 - 2:34像畫面右側這條一樣
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2:34 - 2:36直接複製出DNA雙螺旋
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2:37 - 2:40但另一條單股DNA就沒這麼簡單了
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2:40 - 2:42因為它必須反向複製
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2:43 - 2:44所以小機器會重複把這條DNA抓回來
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2:44 - 2:46形成畫面中的迴圈
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2:46 - 2:48一次只能複製一段DNA
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2:49 - 2:50最後的成果
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2:50 - 2:53就是兩條新的DNA分子
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3:02 - 3:06中文字幕 by Jas4Science
- Title:
- 看見DNA分子（Molecular Visualizations of DNA - Original High Quality Version）
- Description:
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more » « less
本電腦動畫是根據研究資料繪製而成，並且盡可能符合真實狀況。
These DNA molecular visualizations were created for the multifaceted 'DNA' project, celebrating the 50th anniversary in 2003 of the discovery of the double helix. The 'DNA' project includes a five-part documentary series, museum film and 'DNAi' online resources for teachers and students.
The dynamics and molecular shapes were based on X-ray crystallographic models and other published scientific data sets. Leading scientists, including many Nobel Laureates, critiqued the animations during their development. Particular effort was made to ensure the relative shapes, sizes and 'real-time' dynamics were as accurate as possible.
- Video Language:
- English
- Duration:
- 03:06
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jas4science edited Chinese, Traditional subtitles for Molecular Visualizations of DNA - Original High Quality Version | |
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jas4science edited Chinese, Traditional subtitles for Molecular Visualizations of DNA - Original High Quality Version | |
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jas4science edited Chinese, Traditional subtitles for Molecular Visualizations of DNA - Original High Quality Version | |
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jas4science edited Chinese, Traditional subtitles for Molecular Visualizations of DNA - Original High Quality Version | |
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jas4science edited Chinese, Traditional subtitles for Molecular Visualizations of DNA - Original High Quality Version | |
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jas4science edited Chinese, Traditional subtitles for Molecular Visualizations of DNA - Original High Quality Version | |
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jas4science edited Chinese, Traditional subtitles for Molecular Visualizations of DNA - Original High Quality Version | |
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jas4science edited Chinese, Traditional subtitles for Molecular Visualizations of DNA - Original High Quality Version |