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helix
US /ˈhilɪks/
・UK /'hi:lɪks/
C1 高級
n.名詞螺旋，螺旋狀物
The helix looks like a cone
影片字幕
DNA 很重要，但究竟多重要呢？來看看 DNA 的發現如何改變了世界和我的生活 (How the discovery of DNA changed the world – and my life | BBC Ideas)
- It shows two long chains of molecules spiralling around each other in a double helix, like a twisted ladder.
它顯示了兩條長鏈分子以雙螺旋形式相互纏繞，就像一個扭曲的梯子。
- spiralling around each other in a double helix, like a twisted ladder.
在雙螺旋中相互盤旋，就像一個扭曲的梯子。
DNA 和 RNA - 轉錄 (DNA and RNA - Transcription)
- RNA polymerase causes a particular area of the DNA helix to unwind and separate into two strands.
RNA 聚合酶使 DNA 螺旋的一個特定區域解旋並分離成兩條鏈。
Elio 動畫進度總集 | 歡迎來到「共享宇宙」！ (Elio Animation Progression Reel | "Welcome to the Communiverse")
- I am Questa of Gom Helix of Faluvanum.
我是 Faluvanum 的 Gom Helix 的 Questa。
海獺喜歡冰！海洋生物學家解釋了其中的原因 (Sea Otters LOVE Ice! But Why -- A Marine Biologist EXPLAINS)
- Back to teeth. Let's talk about the most unique tooth in the ocean, narwhals. Also known as the unicorns of the sea because of their most impressive asset, their tusk. These tusks are actually a canine tooth that projects from the left side of the upper jaw through the lip and forms a left-handed helix spiral. Some males, about 1 in 500, actually have two tusks. Scientists are still debating and searching for the biological function of the tusk. And while the answer is still unknown, the leading theory is that it's somehow involved in a mating or breeding display because of the fact that males tend to have them more often than females. However, recent analysis has shown that the tusk is a highly innervated sensory organ with millions of nerve endings. So, it appears that this tusk is some sort of sixth sense that helps the animals feel around their dark, wintery, cold world. There are very few tusked animals in the world and only one other tusked marine mammal. It just so happens to be my favorite animal of all time, the walrus. Just like narwhals, the tusks of the walrus grow throughout their lives. They're basically modified canine teeth. They can reach about a meter in length and the root of that tusk grows very close to the sinuses in the walrus. The depth of these canine roots makes dental health for walruses extremely important because they can easily break or chip tusks. And if those tusks get a break or a chip, an infection, an abscess, that infection can very easily make its way up to the sinus and even into the brain. In the beginning of the video,
回到牙齒。讓我們來談談海洋中最獨特的牙齒--獨角鯨。獨角鯨也被稱為海洋中的獨角獸，因為它們最令人印象深刻的資產就是它們的獠牙。這些獠牙實際上是一種犬齒，從上頜左側伸出，穿過嘴脣，形成左旋螺旋狀。有些雄性（大約五百分之一）實際上有兩顆獠牙。科學家們仍在爭論和尋找象牙的生物功能。雖然答案仍是未知的，但主要的理論認為它在某種程度上參與了交配或繁殖的展示，因為事實上雄性往往比雌性更經常長出象牙。然而，最近的分析表明，長牙是一個高度神經支配的感覺器官，有數百萬個神經末梢。是以，這種長牙似乎是某種第六感，可以幫助動物
鏡像細菌是什麼？為何科學家認為它可能顛覆人類生存基礎 (Mirror Bacteria Could Destroy All Life As We Know It)
- When I say DNA is right handed, I'm talking about the configuration of the sugars inside the DNA molecule being right handed, not the twist of the helix.
當我說 DNA 是右手型時，是指 DNA 分子內的糖結構是右手型，不是指螺旋的扭轉。
- Usually the helix is also right handed, but it can be left handed.
通常螺旋也是右手型，但也可能是左手型。