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English Senior High

英語リーディングの共通テスト大門3のB 4つの選択肢を並べるような問題が苦手で、対策問題集を解いている時にいつもどこかしら間違えてしまいます。時間制限を決めつつ、正しい答えを選ぶことがとても難しい状態です。 どのように考えれば良いでしょうか。 また模試などでは、時間と正確... Read More

B You enjoy outdoor sports and have found an interesting story in a mountain climbing magazine. Attempting the Three Peaks Challenge By John Highland Last September, a team of 12 of us, 10 climbers and two minibus drivers, participated in the Three Peaks Challenge, which is well known for its difficulty among climbers in Britain. The goal is to climb the highest mountain in Scotland (Ben Nevis), in England (Scafell Pike), and in Wales (Snowdon) within 24 hours, including approximately 10 hours of driving between the mountains. To prepare for this, we trained on and off for several months and planned the route carefully. Our challenge would start at the foot of Ben Nevis and finish at the foot of Snowdon. Ben Nevis (▲1344 m) Scafell Pike (▲977 m) Snowdon (▲1085 m) We began our first climb at six o'clock on a beautiful autumn morning. Thanks to our training, we reached the summit in under three hours. On the way down, however, I realised I had dropped my phone. Fortunately, I found it with the help of the team, but we lost 15 minutes. We reached our next destination, Scafell Pike, early that evening. After six hours of rest in the minibus, we started our second climb full of energy. As it got darker, though, we had to slow down. It took four-and-a-half hours to complete Scafell Pike. Again, it took longer than planned, and time was running out. However, because the traffic was light, we were right on schedule when we started our final climb. Now we felt more confident we could complete the challenge within the time limit. Unfortunately, soon after we started the final climb, it began to rain heavily and we had to slow down again. It was slippery and very difficult to see ahead. At 4.30 am, we realised that we could no longer finish in 24 hours. - 16- (2110-16)

Unresolved Answers: 1
Biology Senior High

問3.4が分かりません詳しくだけると幸いです

抗生物質は大腸菌などの細菌の増殖を防ぐために用いられる物質で、遺伝子組換え実験にも な 利用される。 以下の実験で用いたプラスミドは図1に示すように、抗生物質であるアンビシリンの作用を 抑える遺伝子(Amp))とラクトース(乳糖)を分解する酵素であるラクターゼの遺伝子(LacZ)を このグラスミドに特定の塩基配列を認識して切断する酵素(A) を作用させて切断した(図1)。 また、同じ酵素を用いてヒトのDNAから遺伝子Xを含む DNA 断片を切り出した(図2)。 素(A)による切断の模式図を図3に示す。 大陽室の両者を混合し、切断点をつなぐ別の酵素(B)を作用させた(図4)。この混合液を特殊な処理 あみをした大腸菌と混ぜたところ、一部の大腸菌がプラスミドを取り込んだ。 続いてアンビシリン 有 状送信と発色基質(無色の物質でラクターゼが作用すると青色の物質に変化する)を含んだ寒天培地上 で一晩培養すると、図5に示すように青色と白色のコロニーの形成が観察された。なお、コロ ニーとは1個の大腸菌が分裂・増殖して形成された集落のことを意味する。また、実験に用い た大腸菌は Amp" 遺伝子と lacZ 遺伝子をもたず、アンビシリンの存在下では死滅するものと はんで 11 立子組み換えに使われる 子のはこびやベクター 抗生物質の 作用をおさえる Amp Tacz 図1 ラクトースを分解 酵素(A)による 遺伝子X

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