23. Which of the following proteins is NOT involved in DNA replication?
(A) nuclease
(B) gyrase
(C) helicase
(D) single-strand binding protein
(E) primase

24. Which non-histone chromosomal protein helps holding sister chromatids together immediately after replication? (A) condensins (B) cohesins (C) helicase (D) topoisomerase (E) telomerase

25. Which of the following activities of E. coli DNA polymerase I allows it to remove RNA primers during lagging strand synthesis? (A) 3' to 5' exonuclease activity (B) 3' to 5' polymerase activity (C) 5' to 3' exonuclease activity (D) 5' to 3' polymerase activity (E) Endonuclease activity

26. Which glycosidic bond between two monosaccharide molecules is FALSE? (A) α(1→1) (B) α(1→4) (C) α(1→6) (D) β(1→1) (E) β(1→4)

27. Because skeletal muscle do not contain _____, glycogen in skeletal muscle cannot be a source of blood glucose. (A) glucose-6-phosphatase (B) glycogen phosphorylase (C) phosphoglucomutase (D) glucose 6-phosphate dehydrogenase (E) phosphorylase

28. Which of the following conditions concerning de novo purine ribonucleotide synthesis is FALSE? (A) Glutamate is a direct source of nitrogen atom for the purine ring. (B) The utility of PRPP is committed step in the synthesis of phosphoribosylamine. (C) Aspartate is a direct source of nitrogen atom for the purine ring. (D) IMP is an intermediate in the synthesis of GMP and AMP. (E) De novo synthesis of purine ribonucleotide would be inhibited by methotrexate.

29. Which compound is NOT an intermediate for the biosynthesis of cholesterol? (A) mevalonate (B) isopentenyl pyrophosphate (C) farnesyl pyrophosphate (D) squalene (E) cholate

複選題30. Which of the following statements about lipoproteins is TRUE? (A) Chylomicrons carry the dietary fat from peripheral tissues to the intestine. (B) VLDL carries TG from the liver to peripheral tissues. (C) VLDL contains ApoB-100. (D) Chylomicrons contain ApoE. (E) LDL contains ApoB-48.

31. In evolutionary biology, what is adaptive radiation, and where is it most likely to occur? (A) It is the rapid evolution of a single species into multiple forms to fill different ecological niches, often seen in isolated environments like islands. (B) It is the process by which species adapt to urban environments. (C) It is the gradual change of a species over time in response to environmental changes. (D) It refers to the radiation of electromagnetic waves by organisms. (E) It is the diversification of species to occupy the same ecological niche.

32. In the life cycle of true plants, the _____ are diploid. ① gamete ② gametophyte ③ spore ④ sporophyte ⑤ zygote (A) ②③④⑤ (B) ②④⑤ (C) ②③⑤ (D) ④⑤ (E) ②⑤

33. Which of the followings is NOT a role of carbohydrates in the extracellular matrix? (A) providing structural support to plant cell walls (B) facilitating cell adhesion in animal tissues (C) acting as a lubricant in joint movements (D) regulating cell growth and proliferation (E) storing genetic information in cells

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