年級

科目

問題的種類

生物 高中

請問47.的D、E怎麼判斷的?

第11頁 共14頁 -3.6 46-48題為題組 請記得在答題卷簽名 自然考科 DNA是生物細胞內攜帶遺傳訊息的物質,當DNA發生變異時,會影響基因的表現進而 改變性狀/但很多生物也可以在不改變 DNA的情況下調節基因表現影響性狀,此方式 稱為表觀遺傳調控,其中常見的機制包括DNA甲基化、組蛋白修飾、小分子RNA等。 「DNA甲基化」為在DNA特定位置上添加甲基的化學修飾,當基因前端的區域——啟 動子被高度甲基化時,常會導致基因表現量較低。而「組蛋白修飾」是針對被 DNA 纏 繞的蛋白質——組蛋白,在其尾端上做的各種修飾,如乙醯化、甲基化、磷酸化等,這 些修飾會影響DNA纏繞的緊密程度,進而加強或抑制基因表現。另外,由長度約為18 也會抑制基因表現。 到30個核苷酸構成的「小分子RNA」 當應用於作物改良時,偵測表觀遺傳變異與性狀之間的關係為首要任務,其中一種用 由於每 來偵測表觀遺傳變異的策略仰賴的是近年才逐漸普遍化的「全基因體定序」 個作物的基因體序列不同,需逐一檢視不同作物在各種逆境條件下產生的表觀遺傳變 異。 表觀遺傳變異與基因變異主要的不同在於其不穩定性,由於細胞有自我修復機制,因 此表觀遺傳變異在細胞複製前、後未必能維持;此外,世代遺傳間的「表觀遺傳重組」 (epigenetic reprogramming)會重置表觀遺傳的分布,使得親代的變異未必能完整保留 到子代。 應用表觀遺傳在作物改良上需特別確認變異在跨世代間的一致性;植株進行處理後所 產生的表觀遺傳變異,是否能在性狀植株或甚至下一代重現,以確保有效的作物改良。 目前主流的基因改造工程,在食品、環境、與生物安全上有著錯綜複雜的影響,僅透 過調控基因表現以達到性狀改良的表觀遺傳,更能消除大眾對於作物改良的疑慮。現 今對於表觀遺傳的研究資料已經越來越多,在植物面臨逆境時,表觀遺傳能有效且迅 速地幫助植物適應環境。在未來環境更加極端的情況下,生產作物將會面臨更嚴峻的 挑戰,如何繼續維持高產量,成為農民及研究者必須解決的問題之一。 46. 由文中可知,作物的表觀遺傳調控與下列何者相關? (A)基因突變 (B)遺傳工程 (e) 異種雜交 (D)基因表現的調控 (E)染色體數目異常 47. 文中提及表觀遺傳調控中「甲基化修飾」可出現在細胞中的哪些分子或構造上?(應 選2項) (A)醣類 CD (B)脂質 (C) DNA DHD) 核糖體 (E)蛋白質

已解決 回答數: 1
英文 高中

可以幫忙解答一下為什麼第二個會是用that嗎? 還是我其他地方有填錯?

他們覺得 中文句 詞是擺 而言, 用的 叶某 4 an international icon". 看語文本身 在臺灣, 會國 E The French Post Office (La Poste) has issued a postage stamp to honour France's famous bread - the baguette. The new stamp is not a run-of-the-mill issue. Its surface is coated with tiny capsules 2 once broken, release the fragrance of freshly baked bread. The €1.96 stamp depicts a baguette 3 with a red, white, and blue ribbon. A shopkeeper in the heart of Paris that sells the "scratch-and-sniff" stamp said it had a "bakery smell". The stamp was launched on Thursday to celebrate the day of the patron saint of bakers and pastry chefs. La Poste said it had an 4 print run of 594,000 copies. It also said French bakers bake more than six billion baguettes every year. The baguette is very close to the hearts of French people. France's President Emmanuel Macron once described it as being "250 grams of magic and perfection". La Poste wrote about the French loaf on its website. It called the baguette, "the bread of our daily lives, the symbol of our gastronomy, the 5 1 of our culture". It explained 6 G experience. why the baguette was so popular. It said: "It is the promise of a delectable On view, it 9 8the 7 with its golden crust... Fresh from the oven, its toasted scent appetite." The baguette was A UNESCO heritage status in 2022. La Poste called the bread, "an ambassador of the bakery craft". It said the baguette, "crosses 10 to become (A) given (B) seduces (C) borders (F) stimulates (G) sensory (H) that (D) decorated (1) jewel (E) commemorative (J) initial 刺激

已解決 回答數: 1
英文 高中

想問1跟4題 謝謝🙏

5. T. (A) Therefore (B) Otherwise (C) Additionally (D) Nevertheless In many places, tourism is becoming a problem. Some areas are (1) tourists that locals' quality of life suffers from crowding, inconsiderate visitors, and housing problems. _ (2), overtourism makes vacations unpleasant for tourists themselves. Tourism should be beneficial for both visitors and locals, but overtourism turns it into a (3) experience for all. The UN agency (4)promoting responsible tourism, the World Tourism Organization (UNWTO), has made some suggestions about overtourism. First, they say we must deal with crowding. Some sights attract (5)_ as they can comfortably hold. The UNWTO recommends providing tourists (6)_ suggestions about lesser-known locations and sights. Some visitors will choose to go there rather than the busy attractions, but __(7)_ about those sights can they go! When attractions are crowded _(8)___ this doesn't work, the UNWTO suggests that the number of tourists that are allowed in each day should be reduced. Another issue that the UNWTO has addressed is the tension between visitors and locals created by overtourism. The UNWTO suggests two (9) to help with this. The first is keeping local people involved in decision-making. Overtourism problems affect some people more than others, and the people (10) should be part of discussions about it. On the tourists' side, local governments should make sure visitors understand local customs so they don't accidentally cause trouble. These recommendations* can make tourism a good thing for everyone. 註:recommendation 建議 B)(A) such full with (B) so full with (C) such full of (D) so full of (V) (2) (A) Accordingly (B) Nevertheless (C) Otherwise (D) Furthermore ()(3)(A) thorough (B) measurable (C) negative (D) narrow (4)(A) that responsible for (B) which responsible for (C) responsible for (D) with responsible for (5)(A) twice as many people (B) twice as more people C) twice as people twice It w

已解決 回答數: 1
1/30