47. What is the essential ingredient for biosynthesis of fatty acid?
(A)
(B)
(C)
(D)
(E)

48. Which of the following statements is   true  ? (A) Non-coding RNAs are known to promote RNA silencing. (B) Ribozymes are more efficient catalysts than protein-based enzymes. (C) 5' end of prokaryotic mRNA are protected from degradation. (D) The sequences in eukaryotic DNA known as introns are those included in the final sequence of messenger RNA. (E) The β-barrel structure motif in transcription factor CREB is responsible for protein-DNA interaction.

49. Which of the following is   not true   concerning silent mutations? (A) Silent mutations refer to base sequence differences that do not change the amino acid coded for. (B) Only changes in base sequence that lead to a different amino acid can have an effect on the organism. (C) Changes in the sequence of an exonic splicing enhancers can lead faulty removal of introns. (D) Silent mutations in a gene for pain tolerance have been correlated with human differences in perception of pain. (E) Translation kinetics and protein folding can be affected by silent mutations.

50. There is no codon for the amino acid hydroxyproline, but this amino acid is a prominent feature of collagen structure. Which of the following is a likely explanation? (A) Hydroxyproline is substituted for proline after translation by a cut and patch mechanism. (B) Proline is covalently modified to give hydroxyproline after translation. (C) There is an alternative mechanism for synthesis of proteins that contain hydroxyproline. (D) All of above are likely explanations. (E) It is not possible to form a hypothesis from the information given.

1. 設 A 點為坐標平面上一點，且 A 點到 x 軸及 y 軸之距離分別為 3 和 4，則下列何者可能為 A 點之坐標？ (A) (-4,-3) (B) (-3,4) (C) (-3,-4) (D) (3,4)

2. 設 , x , y , 為一等差數列，則 x+y = ? (A)(B) 4 (C)(D) 5

複選題3. 設 A(4,-4) 為坐標平面上一點，若 P 點在 x 軸上，且 =2√5，則 P 點坐標可能為下列 何者？ (A) (-2,0) (B) (2,0) (C) (0,-2) (D) (0,2)

4. 設 P 點介於 A(4,-2) 及 B(−2,6) 兩點之間，且 =2:3，則 = ? (A) 4 (B) 5 (C) 6 (D) 8

5. 求多項式 4x³ −7x+5 除以 2x-3 之餘式為何？ (A) 5 (B) 6 (C) 7 (D) 8

6. 設多項式 x²-6x²+kx+21 有因式 x-3，且 k 為常數，則 k= ? (A) -3 (B) -2 (C) 2 (D) 3

7. 已知方程式 x(4-x)=-5，下列何者為此方程式之解集合？ (A) {-1,-5} (B) {-1,-2} (C) {-1,5} (D) {2,5}

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