17. The initiation of a DNA replication needs a lot of proteins to work together. Which one is the one that starts the synthesis of the daughter strand?
(A) Primase
(B) Helicase
(C)Topoisomerase
(D) Ligase
(E) Polymerase I

13. In meiosis, when do the cells become haploid? (A) Anaphase I (B) Telophase I (C)Metaphase I (D) Prophase II (E) Cytokinesis II

14.What are the three levels of conservation of biodiversity? (A) Ecosystem diversity, spectacular diversity, genetic diversity. (B) Ecosystem diversity, species diversity, genetic diversity. (C)Habitat diversity, population diversity, genetic diversity. (D) Ecophysics diversity, species diversity, genetic diversity. (E) Ecosystem diversity, species diversity, phenotypic diversity.

15.Which one is NOT a greenhouse gas that could change the climate patterns? (A) CH4 (B) CO2 (C)N2O (D) N2 (E) All of them above are greenhouse gases.

16. About DNA replication, which one is true? (A) It is an anti- dispersive model. (B) It is a semi-dispersive model. (C)It is a complete-conservation model. (D) It is a dispersive model. (E) It is a semi-conservation model.

18.What was Martha Chase’s contribution to genetics? (A) Discovered the A, C, G, T bases in DNA molecule (B) Found genetic material is probably in cell but not very sure (C)Found that DNA, not protein, is the genetic material (D) Found the function of DNA polymerase III (E) Found DNA is double helix

19. In mark-recapture technique, if 100 individuals were marked at the first capture; at recapture, there were 10 marked individuals in 100 recaptured individuals, what is the estimated population size? (A) 100 (B) 1,000 (C)10,000 (D) 100,000 (E) 1,000,000 

20. In the case of human malaria, which one is the definitive hosts? (A) Anopheles (B) Homo sapiens (C)Plagiorhynchus (D) Drosophila (E) Plasmodium

21. Gregor used parent generation seeds that have yellow-round phenotype (genotype YYRR) to cross with the parent generation seeds that have green-wrinkled phenotype (genotype yyrr). Then he crossed their F1 seeds to generate F2 seeds. Given the gene encodes color and the gene encodes shape of the seeds are independent assorted, what is the expected phenotypic ratio of the F2 seeds (Yellow-Round: Green-Round: Yellow-Wrinkled: Green-Wrinkled)? (A) 9:3:3:1 (B) 1:2:2:1 (C)2:3:3:2 (D) 4:1:1:4 (E) 1:4:4:1

22. Which description is incorrect about the viruses that infect bacteria? (A) They named phages. (B) They inject their genetic material in the bacterial cells. (C)They replicate within their host cells. (D) They could use either lytic cycles or lysogenic cycles to reproduce. (E) They all eventually break the host cells and kill the host cells.

23. We learned that gene expressed through transcription and translation. Which one below would involve in translation of a eukaryotic cell? (A) Ribosome (B) DNA template (C)RNA polymerase (D) Promoter (E) Spliceosome