PORTAGE MICROBIOLOGY LATEST UPDATED EXAM JULY- AUGUST 2023/2024

PORTAGE MICROBIOLOGY LATEST UPDATED EXAM JULY- AUGUST 2023/2024 1. The radius of the path of an object in uniform circular motion is doubled. The centripetal force needed if its speed remains the same is . A. Four times as before B. Half as great as before C. Twice as much D. Three times as much 2. Car A has a mass of 1000kg and a speed of 60km/hr. car B has amass of 2000kg and a speed of 30km/hr. compare the kinetic energy foe car A with that of car B. A. Half as much B. Four times as much C. Equal D. Twice as much 3. What would be the horizontal line in a position-time graph means? A. Changing position, constant velocity B. Constant position, constant velocity C. Changing position, increase velocity D. Constant position, zero velocity 4. What is the car‟s acceleration if ten seconds after the starting from rest; it is moving at 40m/s? A. 4.0m/s2 B. 10m/s2 C. 2.5m/s2 D. 0.25m/s2 5. A heavy object and a light object are released from the rest at the same height and time in a vacuum. As they fall, they have equal . A. Weights B. Moments C. Acceleration D. Energies 6. Airplanes are designed with pointed nose and thin tails in order to . A. Produce fluid friction B. Reduce drag C. Increase the lift of the wing 1 D. Lessen the forward thrust 7. A stone was thrown upward from the roof, at the same time that an identical stone was dropped from there. The two stones will . A. Have the same velocity upon reaching the ground B. Take the same time to reach the ground 2 C. Have they same acceleration when they reach the ground D. Reach the ground at the same time PORTAGE MICROBIOLOGY FINAL EXAM LATEST 8. In a pair of scissors, the fulcrum is located at the . A. Handle B. Screw C. Tip of the blades D. Sharp edges 9. What kind of energy is possessed by water falling from a dam? A. Potential B. Kinetic C. Accelerating D. Interacting 10. If an object were equipped with a speedometer and allowed to fall freely on a planet where the acceleration due to gravity is 20m/s2, by, how much will the reading on the speedometer increase each second? A. 30m/s B. 20m/s C. 40m/s D. 10m/s 11. According to the kinetic molecular theory, liquids are similar in solids in that . A. Their molecules are arrange in a regular manner B. The motion of their particles changes with temperature C. The motion of their particles cannot be determined D. There is very little space in their molecules 12. When the solid block of materials is cut in half, its density is . A. Unchanged B. Halves C. Doubled D. Tripled 13.A ball is launched at an angle of 60 degrees from the horizontal. What do you call the horizontal distance traveled by the ball? A. Trajectory B. Projectile C. Range D. Hyperbola 14. Which of the following is TRUE about an object thrown horizontally? A. The vertical distance traveled increases uniformly B. The horizontal motion is uniformly accelerated C. The horizontal component of velocity increases D. The velocity of the subject increases 15. In the absence of the air resistance, a projectile has a maximum range when thrown at an angle of . A. 90 degrees B. 60 degrees 4 C. 30 degrees D. 45 degrees 16.A 400 N woman stands on top of a very tall ladder so she is one earth radius above the earth‟s surface. How much does she weights? A. 100N B. Zero C. 200N D. 400N 17.What must be the minimum length of the plane mirror in order for you to see a full view of yourself? A. Your full height B. One-fourth C. One-half D. Three-fourths 18.A rifle recoils from firing a bullet. The speed of the recoil is slow because . A. The force against the rifle is less B. The rifle has more mass than the bullet C. The impulse on the rifle is less D. The momentum of the rifle is unchanged. 19. Which statements differentiate weight for mass? A. Weight is distance from a reference point B. Weight has volume, mass has none C. Weight is a full of gravity, mass is space occupied D. Weight is a force while mass is amount of matter 20. Who established the relationship between the volume of a gas and the pressure when the temperature is constant? A. Blaise Pascal B. Robert Boyle C. Lavoisier D. Archimedes ANSWER KEY 1. B 2. D 3. D 4. A 5. C 6. B 7. C 8. B 9. B 10.B 11.B 12.A 13.C 14.D 15.D 16.A 17.C 18.B 19.D 20.B NATURAL SCIENCE (4) 1) Solar eclipse occurs when . a. The Moon is between the Earth and the Sun. b. The Earth is between the Moon and the Sun. c. The Sun is between the Earth and the Moon. d. The Earth is behind the Sun. 2) What phase of the Moon is observed when it cannot be seen at all because it passes directly between the Earth and the Sun? a. New Moon b. First quarter c. Last Quarter d. Full Moon 3) Fossils are mostly to be found in . a. Sedimentary rocks b. Igneous rocks c. Metamorphic rocks d. Plutonic rocks 4) Tropical disturbances are classified as tropical depression, tropical storm or typhoon. This classification is based on the . a. Amount of rainfall b. Strength of the accompanying winds c. Amount of rainfall and strength of accompanying winds d. Origin of formation 5) The Philippines lies in the region where many volcanoes are active. This region is known as: a. Wheel of Fire b. Ring of Fire c. Volcanic Rim d. Archipelagic Fault Line 6) The following means help in controlling floods, EXCEPT: a. Reforestation b. Deforestation c. Crop rotation d. Construction of flood ways 7) Petroleum is formed by the . a. decay of microorganisms under heat and pressure b. heat from radioactive substances found in the mantle c. volcanic eruptions that burn living matters d. steam trapped underneath a geologic column 8) Farmers add commercial fertilizers to the soil to . a. Speed up the decay of bacteria b. Add mineral content c. Activate the growth of earthworms d. Enhance the growth of the roots 9) All of the following are reasons why terraces are built in Mountain Province, EXCEPT: a. to accommodate excess run of water b. to provide space for planting rice c. to make the place beautiful d. to provide steps for the natives to go up hill 10) When a plant cell is placed in a hypertonic solution, the plant cell will: a. expand b. rupture c. shrink d. have no effect on the plant cell. 11) Which of the following organisms is included in the Kingdom Plantae? a. Magnolidae b. Fungi c. Protozoa d. Prokaryotes 12) Which part of the brain is responsible for intelligence, memory and learned behavior? a. Cerebellum b. Cerebrum c. Medulla d. Thalamus 13) What is most likely happen when a species cannot adapt to the changes in the environment? a. It will be transform to another form b. It will become extinct c. It will be isolated d. It will grow old 14) A cold-blooded animal is one that . a. lacks red corpuscles b. lacks white corpuscles c. has a variable body temperature d. has a fixed body temperature 15) Spiders can be distinguished from insects by the fact that spiders have . a. hard outer covering b. four pairs of legs c. large abdomens d. biting mouth parts 16) A lot of malnourished children in Africa are found to have poor teeth and eyesight. This is believed to be caused by deficiency in . a. Vitamin A and D b. Iodine c. Vitamin C d. Iron 17) The two chemical factors that can cause decomposition are: a. death and cellular respiration b. autolysis and photosynthesis c. autolysis and putrefaction d. putrefaction and respiration 18) How will genetic drift affect the population of rabbits that are living in a stable habitat with no changes in the environment? a. It will increase the population of the rabbits. b. It will decrease the genetic variation of the rabbits c. It will develop the dominance and superior traits of the rabbits. d. It will enhance the appearance of new traits of the rabbits. 19) Which of the following is under the grass family? a. Bamboo b. Fern c. Moss d. Mushroom 20) The appendix, though a part of the large intestine, has no digestive function. It is therefore called: a. a heterogeneous organ b. a vestigal structure c. an addendum organ d. an analogous structure 21) Which of the following is the by-product of photosynthesis? a. Oxygen b. Nitrogen c. Carbon dioxide d. Carbohydrates 22) The protein shell of a virus is called . a. Nucleolus b. Capsid c. Nucleus d. Nucleic acid 23) What theory of evolution accounts for snake‟s disappearance of legs and development of giraffe‟s long neck? a. Theory of use and disuse b. Theory of natural selection c. Theory of chromosomal change d. Theory of action and interaction 24) is an aquatic blood-sucking annelid worm that can be used to facilitate anticoagulation: a. Earthworm b. Leech c. Flatworm d. Remora 25) Which of the following is an example of non-pathogenic microorganisms? a. Probiotics such as lactobacilli b. Yersenia pestis c. Plasmodium vivax d. Influenza SP 26) What stage in chicken pox considered very contagious? a. When wounds are peeling off b. When wounds have swollen c. When all wounds have disappeared d. During the first week 27) The main organ for respiration is the . a. Nose b. Lungs c. Esophagus d. Trachea 28) Which chemical substance produced by the body regulates and coordinates the functions and activities of bodily organs: a. gene b. deoxyribonucleic acid c. hormone d. enzyme 29) All of the following are autotrophs, EXCEPT: a. Fern b. Grasshopper c. Herb d. Grass 30) What organism would most likely be in arctic environment? a. Frog b. Tutle c. Rice birds d. Walrus 31) Which of the following best describes the science of Ecology? a. Living things b. Rocks c. Life and Environment d. Weather and Climate 32) What do you call the natural environment where a certain organism lives and thrives? a. Community b. Habitat c. Country d. Ecosystem 33) When water from a river is mixed with sewage in a septic tank, water pollution occurs and this is called . a. Eutrophication b. Hypertrophication c. Hydrolysis d. Water condensation 34) The Kyoto Protocol requires the reduction of greenhouse gases in the environment. This practice advocates: a. Environmental protection b. Energy conservation c. Ecological destruction d. Sustainable development 35) Which body organ is responsible for the removal of waste from the blood and body fluids? a. liver b. pancreas c. kidney d. large intestine 36) At present, scientists report about the formation of holes in the ozone layer of the atmosphere. This dangerous trend is being blamed on which of the following wrong practices? a. The use of ozone itself on the surface or the Earth. b. The excessive use of aerosols. c. Removal of the protective cover like the green plants. d. The use of soil fertilizers on Earth. 37) Where do producers obtain their energy? a. From other producers b. From the consumers c. From the decomposers d. From the sun 38) What term is used to describe the ability to maintain a constant internal environment? a. Metabolism b. Growth and Development c. Homeostasis d. Thermoregulation 39) What is the most common cause of cardiovascular disease? a. Fatty deposits in the arteries b. Inadequate supply of red blood cells c. Lack of sodium in the diet d. Increased heartbeat 40) Which is the smallest unit of life that can survive and reproduce on its own? a. Cell b. Organ c. Tissues d. Population 41) Which region of a vertebrate forebrain is considered with the neutral- endocrine control of visceral activities? a. Cerebellum b. Thalamus c. Hypothalamus d. Pituitary 42) Which of the following is the building block of carbohydrates? a. Amino acid b. Nucleotide c. Fatty acid d. Monosaccharide 43) Why it is necessary men have more red blood cells per cubic millimeter of blood than women? a. Man does strenuous activities and need more energy b. They have bigger physique and need more blood c. Man waste more blood cells and need extra d. They are more prone to anemia disorders 44) Which of the following is the building block of protein? a. Amino acid b. Nucleotide c. Fatty acid d. Monosaccharide 45) Why are our lips “redder” than our palm? a. There is increased blood flow in the lips b. Lips are heavily keratinized c. Lip epidermis is thinner d. Many blood vessels are located around the lips 46) What is the branch of zoology that is devoted to the study of fish? a. Helminthology b. Ichthyology c. Entomology d. Ornithology 47) We feel warmer just before it rains because . a. Heat is released by the evaporation of water b. The clouds prevent heat from escaping the earth c. There is an increased relative humidity d. Heat is released by the condensation of water vapor 48) Which of the following is not considered as a reproductive cell? a. Gamete b. Somatic cell c. Egg cell d. Sperm cell 49) What is that flap-like structure that prevents the food from going the wrong way during swallowing? a. Epiglottis b. Larynx c. Esophagus d. Pharynx 50) Where does ectopic pregnancy occur? a. Uterus b. Ovary