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Chemistry / Life Sciences

Examine chemistry, molecular and cellular science, genetics, ecology, environment, and agriculture through mechanisms, experiments, and quantitative reasoning. We study past-paper topics and formats across Japanese graduate schools, then independently write and substantially rework foundation, standard, and stretch practice with level-appropriate extensions. Copyright in original questions belongs to Ryugaku Jinja.

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日·EN·中
← Exam Dojo

PRACTICE DOJO

Chemistry / Life Sciences

Examine chemistry, molecular and cellular science, genetics, ecology, environment, and agriculture through mechanisms, experiments, and quantitative reasoning. We study past-paper topics and formats across Japanese graduate schools, then independently write and substantially rework foundation, standard, and stretch practice with level-appropriate extensions. Copyright in original questions belongs to Ryugaku Jinja.

Question bank
2,325
Exam format
Chemistry, life, environment
Scoring / pass mark
No pass mark, set per school
Scope basis
Original in-site study scope

EXAM OVERVIEW

Know the exam before you train

Review the question bank and training sections, then start training.

Training sections
1
Display modes
Japanese + Chinese · Japanese only · Japanese + English
Life sciences and chemistry2325

What the bank covers

Category breakdown

  • Ecology13 questions
  • Organic chemistry11 questions
  • Evolution7 questions
  • Inorganic chemistry3 questions

Knowledge areas

  • General chemistry625 questions
  • Organismal and plant systems513 questions
  • Cellular and genetic science495 questions
  • Biochemistry and molecular biology422 questions
  • Quantitative and computational science141 questions
  • Related physics foundations66 questions
  • Agriculture, food and economics37 questions
  • Environmental science26 questions

Question formats and volume

  • Written response2,213 questions
  • Single choice47 questions
  • Numeric entry35 questions
  • Multiple choice30 questions

Question attributes

  • Includes material2,100 questions
  • Includes an image673 questions

Material and image counts are question attributes, counted separately from the formats above.

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Recommended training path

  1. 01Understand the scopeSections, formats and difficulty spread are all readable without an account.
  2. 02Focused drillsPick one section or knowledge area and drill only that.
  3. 03Review mistakesWrong answers go to your wrongbook and come back when review is due.

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Sample question

Passage
互いに交雑しない二つの架空の系統 X、Y について、相同な DNA の二つの区間を比較する。区間 I と II はともに 12 塩基長であり、全長に対する重みは等しい。R は分岐直前の祖先配列で、復元誤差はない。挿入・欠失、遺伝子流動および組換えはないものとする。表の各文字は同じ列の塩基と対応し、座位番号は区間ごとに左から数える。 現存する X と Y の不一致率を ppp、一座位当たりの推定置換数を KKK とする。設問（2）（3）では、各区間内で四塩基の平衡頻度と置換率が対称なモデルを用い、区間間では置換量が異なってもよい。補正式は以下のとおりである。計算には ln⁡2=0.6931\ln 2=0.6931ln2=0.6931、ln⁡3=1.0986\ln 3=1.0986ln3=1.0986 を用いてよい。
（1）区間 I の第3座位だけについて、分岐後の各枝で置換は高々1回と仮定する。X と Y が一致しているにもかかわらず、両枝での置換を見落とす原因となる事象はどれか。最も適切なものを一つ選べ。 表1　架空の整列済み DNA 配列配列区間 I（12 塩基）区間 II（12 塩基）RACGTTACGATGCTTGACCGATGCAXACATTACGATGCTTGACCGATGCAYACATTGCGTTGAATCATCAACGTAK=f(p)=−34ln⁡ ⁣(1−43p),0≤p<34K=f(p)=-\frac34\ln\!\left(1-\frac43p\right),\qquad 0\le p<\frac34K=f(p)=−43​ln(1−34​p),0≤p<43​
  1. Aア：祖先多型が置換なしで両系統に受け継がれたこと。
  2. Bイ：各枝で祖先状態へ戻る復帰置換が起きたこと。
  3. Cウ：同じ祖先状態から同じ派生状態への平行置換が独立に起きたこと。
  4. Dエ：祖先状態を保ったまま、同義コドンの使用頻度だけが変化したこと。

The sample shows the stem and choices only; answers and explanations come with practice.