Earth Science Second Quarter Exam PDF

Region I LA UNION SCHOOLS DIVISION OFFICE San Fernando City Name: Year/Section: EARTH SCIENCE SECOND QUARTER EXAMINATION...

Region I LA UNION SCHOOLS DIVISION OFFICE San Fernando City Name: Year/Section: EARTH SCIENCE SECOND QUARTER EXAMINATION SY 2024-2025 General Instruction: This is a 60-item test, read each direction written in every type of test, answer this test in one hour. Work silently and surely. I. Multiple Choice. Direction: Choose the letter of the BEST answer and encircle it. Please avoid ERASURES. 1. Which transport mechanism is defined as the movement of molecules from an area of higher concentration to an area of lower concentration? A. Active transport B. Diffusion C. Osmosis D. Pinocytosis 2. Which of the following bulk transport mechanisms DOES NOT transport materials towards the cell? A. Exocytosis B. Phagocytosis C. Pinocytosis D. Receptor-mediated endocytosis 3. Which of the following passive transport mechanisms requires a carrier protein? A. Osmosis B. Diffusion C. Facilitated Diffusion D. Both A and B 4. 4. Which process enables large molecules like fats and proteins to enter a cell? A. Active transport B. Diffusion C. Osmosis D. Pinocytosis 5. What happens to the cell if it is placed in a hypertonic medium? A. The cell swells. B. The cell shrinks. C. The cell tends to absorb more water. D. The medium does not affect the cell 6. A U-tube is divided into halves by a semi-permeable membrane. Side A contains sugar solution and side B contains an equal amount of pure water. In which direction will more water molecules move per unit of time? A. From A to B B. From B to A C. From A to B then B to A D. No movement of water 7. What process takes place in the setup in item number 3? A. Diffusion B. Osmosis C. Plasmolysis D. Phagocytosis 8. In the lungs, the movement of carbon dioxide out of cells and oxygen into cells can be best explained by which of the following processes? A. Active transport B. Diffusion C. Endocytosis D. Osmosis 9. What is/are the requirements for the passage of materials into and out of cells in active transport? A. Carrier and cellular energy B. Carrier only C. Concentration gradient only D. Vacuole formation 10.A biochemist is studying the transport of substance X into cells. She finds out that the transport is affected by a chemical that inhibits energy production. Substance X is possibly transported into cell by what process? A. Active transport B. Diffusion C. Facilitated diffusion D. Osmosis 11.In the figure, the sack is permeable to both water and sugar molecules. Which event might likely happen to the molecules of water? A. Water will move from the sack to the jar. B. There will be no movement of water molecules. C. Water will move from the jar going inside the sack. D. Water molecules will diffuse throughout the jar only without entering the sack. 12. A red blood cell is placed in a solution of pure water. What is the best description of the interior of the cell? A. Isotonic B. Hypertonic C. Hypotonic D. Plasmolysis 13.Based on the figure below, which is likely to happen if a red blood cell is placed in distilled water? A. The concentration of solutes outside is lower than the inside of the cell. Hence, the cell swells. B. The concentration of solutes outside is equal with the cell; hence, the size stays the same.  Region I LA UNION SCHOOLS DIVISION OFFICE San Fernando City C. The concentration of solutes outside is higher than the inside of the cell, hence it shrinks. D. The cell bursts due to the large amount of water entering it. 14.A cell with 5% of solute concentration is placed in a beaker with a 1% solute concentration. What will happen to the cell over time? A. The cell will gain water and expand. B. The cell will lose water and shrink. C. The cell will undergo no exchange of water with its surroundings. D. The cell will both gain and lose equal amounts of water; thus, it will remain the same. 15.A red blood cell is placed in a solution of pure water. What is the best description of the interior of the cell? A. Isotonic B. Hypertonic C. Hypotonic D. Plasmolysis 16. Which of these elements is NOT a constituent of Carbohydrates? A. Carbon B. Hydrogen C. Oxygen D. Nitrogen 17. What is another word that might describe complex carbohydrates? A. Monosaccharide B. Disaccharide C. Polysaccharide D. None of the above 18. What is the main reason why rate of enzyme action increases with temperature initially is? A. More substrates are produced, therefore the enzymes become saturated B. The enzymes become denatured C. The kinetic energy of enzymes and substrates increases 19. What cellular structure does chlorophyll and other photosynthetic pigments reside? A. Cell Wall B. Chloroplast C. Nucleus D. Ribosome 20. What color of the visible light is reflected when the plant leaves appear as green in color? A. Blue B. Green C. Red D. Yellow 21. Which event occurs first during photosynthesis? A. Carbon dioxide enters through the stomata of the leaves. B. Chlorophyll changes molecules of carbon dioxide and water into glucose. C. Oxygen will be released. D. Plants capture light energy and use that energy to make glucose. 22. What two main products result from photosynthesis? A. Carbon dioxide and water B. Glucose and oxygen C. Glucose and carbon dioxide D. Water and oxygen 23. Which equation describes the chemical reaction of photosynthesis? A. 6 CO2 + 6 H20 = C6H12O6 + 6 O2 B. CHO + 02 = CO2 + H20 C. CO + HO = CHO + O D. CO2 + H20 = C6H12O6 + 6 O2 24. Which equation describes the chemical reaction of respiration? A. CO2 + H20 = CHO + 02 B. C6H12O6 + 6 O2 6 = CO2 + 6 H20 C. CO + HO = CHO + O D. C6H12O6 + 6 = O2 CO2 + H20 25. Which of the following does not happen during photosynthesis? A. Carbon dioxide enters the leaf through holes called pistil. B. CO2 combines with the stored energy in the chloroplasts through a chemical reaction to make glucose. C. The sugar is moved through tubes in the leaf to the roots, stems and fruits of the plants. D. Some of the sugar is used right away by the plant for energy; some is stored as starch; and some is built into plant tissue. 26. Which is true about the photosynthetic pigments? A. There is only one kind of chlorophyll. B. Chlorophyll absorbs mostly green light. C. Chlorophyll is required in the Calvin cycle. D. Chlorophyll is formed in the membrane of thylakoids 27. The first electron carrier that is responsible in transferring electrons to the protein know as cytochrome b6f?  Region I LA UNION SCHOOLS DIVISION OFFICE San Fernando City A. Ferredoxin B. Plastocyanin C. Plastoquinone D. FNR 28. It mediates electron transfer between photosystem I (PS I) and several ferredoxin-dependent enzymes A. Ferredoxin B. Plastocyanin C. Plastoquinone D. FNR 29. It functions as an electron transfer agent between cytochrome f of the cytochrome b 6f complex from photosystem II and P700+ from photosystem I. A. Ferredoxin B. Plastocyanin C. Plastoquinone D. FNR 30. This protein uses the electrochemical proton gradient generated by photosynthesis to produce ATP, the energy currency of all cells. A. Photosystem I B. Photosystem II C. Cytochrome B6F D. ATP Synthase