11. In a cell cycle of human (mitosis), which stage is the stage that duplication of chromosomes happens?
(A) Prophase
(B) Anaphase
(C)Prometaphase
(D) Interphase
(E) Telophase

7. Which one is NOT a valid description about diffusion of particle in cells? (A) The passive transport of particles depends on diffusion. (B) There is no energy investment for cells when passive transport happens. (C)When transport across cell membrane, the driving direction of the molecules depends on concentration gradient. (D) If the environment of a cell is hypotonic, the size of the cell would enlarge. (E) Diffusion across cell membrane never involve transport proteins.

8. For transport of large molecules, such as some proteins or polysaccharides, the most likely way of cell transport is ____. (A) diffusion (B) endocytosis (C)facilitated diffusion (D) active transport using protein channels (E) osmosis

9. In cellular respiration stages, which one is the stage that uses oxygen? (A) Glycolysis (B) Citric acid cycle (C)Electron Transport Chain (D) Pyruvate oxidation (E) Chemiosmosis

10. Where does photosynthesis take place in a plant leaf? (A) Stomata (B) Chloroplasts (C)Vein (D) Cell wall (E) Tracheids

12. What is a metastasis in cancer development? (A) The beginning of a cancer development. (B) The growing stage of a tumor. (C)It is the end stage of begin tumor. (D) It is the spreading stage beyond the original site of cancer cells. (E) It is the stage of malignant tumor. 

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.

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