3. In animal cells, microtubules grow from
(A) the plasma membrane.
(B) the outer membrane of the nuclear envelope.
(C) centrosomes containing centrioles.
(D) dimerization centers located throughout the cytosol.
(E) the tips of the chromosomes.

25.丁老師的想法較接近下列哪一種教育理念？ (A)永恆主義(Perennialism) (B)理性主義(Rationalism) (C)批判理論(Critical Theory) (D)精粹主義(Essentialism)

5.李老師以存在主義(Existentialism)的教育哲學觀點作為教學方案設計重點的基礎，下列敘述何者較為符合他的教學目標？(2 分) (A)教師應教授基本教材，討論的正是同學應該瞭解的時事內容，目的是訓練同學的心智 (B)教授基本教材是教師的重要工作，討論的重點是讓同學瞭解，在新冠病毒流行時期， 紀律對於學習的重要性 (C)教師是促進者，討論並無正確答案，而是要幫助同學瞭解如何抉擇、如何設定目標、 並能為自己的選擇負責 (D)教師的責任是傳遞社會價值，新冠病毒讓教育體系失能時，討論的重點是找到重建 學習秩序的方法

1. All organic molecules contain (A) oxygen and carbon. (B) nitrogen and oxygen. (C) hydrogen and oxygen. (D) carbon and nitrogen. (E) hydrogen and carbon.

2. A protein's _______ structure contains helixes and sheets that result from hydrogen bonding between carboxyl and amino groups of the polypeptide chain. (A) primary (B)secondary (C) tertiary (D) quaternary (E) both secondary and quaternary

4. The nucleus is to eukaryotes as the _______  is to prokaryotes. (A) plasmid (B) RNA strand (C) ribosome (D)nucleoid (E) nucleolus

5. Two "magic" solutions are sold by a research supply company. 'Magic Solution A" promises to extract all proteins, including integral membrane proteins, from the plasma membrane. "Magic Solution B" promises to simply extract all peripherally associated membrane proteins. What is the likely composition of ''Magic Solution A" and 'Magic Solution B'r? (A) "Solution A" and "Solution B" both contain high salt buffers that disrupt hydrogen bonds and ionic interactions (B) "Solution A" and "Solution B" both include membrane solubilizing detergent(s) (C) "Solution A" is a membrane solubilizing detergent, "Solution B" is a high salt buffer that disrupts hydrogen bonds and ionic interactions (D) "Solution A" is a high salt buffer that disrupts hydrogen bonds and ionic interactions, "Solution B" is a membrane solubilizing detergent (E) "Solution A" is a reducing buffer that disrupts disulfide bonds in proteins, "Solution B" is a membrane solubilizing detergent

6. What would be an expected feature of a plasma membrane that had no integral membrane proteins? (A) The membrane would be unable to transport sodium ions (B) The membrane would collapse (C) The membrane would have no fluidity (D) The membrane would have no cholesterol (E) The membrane would not associate with peripheral membrane proteins

7. In the equation, , ATP and heat would be on which side of the reaction? (A) The products because this is an exergonic reaction. (B) The reactants because this is an endergonic reaction. (C) It could appear on either side because this reaction is in equilibrium. (D) The reactants because this is an exergonic reaction. (E) The products because this is an endergonic reaction.

8. How is a gradient of H+ ions formed across the inner mitochondrial membrane? (A) The electron transport chain uses energy from transfer of an electron donated by NADH to pump H across the inner mitochondrial membrane against its electrochemical gradient. (B) ATP synthase generates a H+ gradient across the inner mitochondrial membrane. (C) Electrons move fom NADH to a chain of proteins with lower electronegativities. (D) The electron transport chain uses ATP to pump Ht across the inner mitochondria membrane against its electrochemical gradient. (E) The electron transport chain of proteins contains pores that are leaky to H+.

9. When a cell secretes a growth factor that binds to receptors on its own membrane preventing it from proliferating, this is an example of _______. (A) direct intercellular signaling (B) endocrine signaling (C) contact-dependent signaling (D) paracrine signaling (E) autocrine signaling