ATI TEAS Test Science Questions and Answers

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ATI TEAS Test Science Questions andAnswersAn organism with chloroplasts in its cells is probably.a. a heterotrophb. an autotrophc. an herbivored. a primary consumer Correct answer- B: Organisms that have chloroplasts in theircells carry on photosynthesis and are therefore autotrophs. Autotrophs make their ownfood.What property of water allows someone to fill a glass slightly above the rim without thewater flowing over?a. specific gravityb. capillarityc. opacityd. surface tension Correct answer- D: Water molecules are polar. Due to the fact that02 draws the electrons in the molecule toward itself.The spaces between neurons are called?a. synapsesb. dendritesc. inter-neuronsd. cell gaps Correct answer- A: An impulse travels down the axon of a neuron andreaches the terminus. There, chemicals are released in response, which travel acrossthe synapse to the next neuron. Thus the impulse is transmitted to the next neuron.Which Group of chemicals is not normally found in most living things?a. carbohydratesb. proteinsc. silicatesd. nucleic acids Correct answer- C: Carbohydrates, proteins, and nucleic acids (RNAand DNA) are all very important chemicals in living things.The alimentary canal is associated with the?a. spinal cordb. digestive systemc. urinary tractd. birth canal Correct answer- B: The alimentary canal begins at the mouth and ends atthe anus.The numerous villi in the small intestine serve to?

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a. secrete enzymes for digestionb. absorb water from dissolved foodsc. secrete hydrochloric acid to dissolve foodd. provide greater surface for absorption Correct answer- D: The villi are tiny projectionsin the small intestine that increase the total surface area of the intestine for absorptionof digested nutrients.As light passes obliquely from air to water, it is bent. This bending is called?a. diffractionb. reflectionc. refractiond. dispersion Correct answer- C: Refraction is the bending of light as it passes obliquelyfrom one medium to another.Which of the following organelles is not involved in protein synthesis?a. ribsomeb. mitochondrionc. rough endoplasmic reticulumd. nucleus Correct answer- D: The nucleus contains DNA. The ribosomes, located onthe rough endoplasmic reticulum, are the site for protein synthesis.To be absorbed by cells, proteins must be changed to?a. amino acidsb. sucrosec. fatty acidsd. glycerol Correct answer- A: Amino acids are the end products of protein digestionand are small enough to be absorbed.A neuron that transmits impulses from the receptors to the spinal cord is called?a. motor neuronb. an associative neuronc. an interneurond. a sensory neuron Correct answer- D: A sensory neuron conveys a message from asensory organ to the spinal cord, which transmits the message via a motor neuron tothe effector muscle.Which group of organisms help prevent the accumulation of organic wastes in nature?a. rabbitsb. mossesc. bacteriad. ferns Correct answer- C: Bacteria comprise the decomposer portion of the foodchain.As the eardrum is made to vibrate more rapidly, the sound is perceived as?a. louder in intensityb. softer in intensity

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c. higher in pitchd. lower in pitch Correct answer- C: High-pitch sounds are heard when the receptorcells closer to the oval window are stimulated, and low-pitch sounds result from thestimulation of the cells that are farther down the cochlea.In a field of pure white asters, a grower noticed a single blue aster. How could thegrower test whether this change affected the gamete-producing cells of the plant?a. self-pollinate the flower, and plant the resulting seedsb. examine the blue petals under an electron microscopec. preform a chemical analysis to find the nature of the blue pigmentd. preform vegetative propagation on a cutting of the plant Correct answer- A:Remember that during a phase change from liquid to gas the temperature remainsconstant at 100C.A human egg will develop into a female if it is fertilized by sperm containing?a. an X chromosomeb. a Y chromosomec. an XY chromosomed. an XXY chromosome Correct answer- A: A female has two X chromosomes, and amale has one X chromosome and one Y chromosome. For a human egg to develop intoa female, it must be fertilized by a sperm containing an X chromosome.In a food chain involving grass, grasshoppers, birds and mammals, the orginal source ofenergy is?a. glucoseb. sunlightc. chlorophylld. ATP Correct answer- B: Sunlight is absorbed by the chlorophyll contained in plants.The absorbed energy fuels photosynthesis which produces glucose. In this food chain,grass is the producer.Which of the following equations represents a neutralization reaction?a. 2Na+MgCI2 > Mg+2NaCIb. CaCO3+4C > 3CO+CaC2c. 4NH3+5O2 > 6H2O+4NOd. H2CO3+Ca(OH)2 > 2H2O+CaCO3 Correct answer- D: Equation d is a reactionbetween an acid (carbonic acid) and a base [(Ca(OH)2] to form water and a salt. It isthe only neutralization reaction among the choices.A reading on the Celsius scale is 5. On the Fahrenheit scale, the reading would becloset to?a. 225b. 30c. 40

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d. 95 Correct answer- C: the formula for converting temperature in Celsius totemperature in Fahrenheit is: T Fahrenheit = 9/5 x T Celsius + 32, therefore 5 degreesCelsius convert to 41 degrees Fahrenheit. 9/5 x 5 = 99 + 31 = 41FWhich of these formulas represents an alcohol?a. C2H5OC2H5b. C3H8c. CH3COOHd. C2H5OH Correct answer- D: An alcohol is usually characterized structurally by thepresence of an OH group attached to a hydrocarbon.If a car's rate of change of velocity is negative, the car is?a. speeding upb. maintaining a constant speedc. slowing downd. stopped Correct answer- C: If a car's rate of change of velocity is negative, the car'sacceleration is negative, this means that the car is decelerating (slowing down).Consider the unbalanced equationN2+H2 >NH3. What is the coefficient ofammonia in the balanced equation that has the smallest whole-number coefficient?a. 1b. 2c. 3d. 4 Correct answer- B: When balancing an equation, the number of atoms of eachelement must be the same on both sides of the equation: N2+3H2 > 2NH3Which of these nitrogenous bases may be found in RNA. but not DMA?a. uracilb. adeninec. thymined. guanine Correct answer- A: Uracil is found in RNA but not DNA. Thymine is found inDNA but not in RNA. Guanine, cytosine and adenine are found in both.A substance with a ph of 8 is a?a. strong acidb. weak acidc. strong based. weak base Correct answer- D: A substance with a ph between 8 and 14 is basic. Thecloser the substance gets to a ph of 14, the more basic it is.Binary fission in paramecia and budding in yeast cells are examples of?a. asexual reproduction onlyb. sexual reproduction onlyc. spontaneous generation and sexual reproduction

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d, both sexual and asexual reproduction Correct answer- A: Binary fission and buddingare both examples of asexual reproduction, because cell division in both cases dependson mitosis.Which of these substances forms an alkaline solution in water?a. Mg(OH)2b. H2SO4c. MgSO4d. NaCI Correct answer- A: Magnesium hydroxide is the only base of the four choices.Thus in water, magnesium hydroxide releases hydroxide ions, forming a basic oralkaline solution.Certain seaweeds accumulate iodine in a concentration as much as a million timesgreater than that of the surrounding ocean. How must this intake be accomplished?a. osmosisb. diffusionc. active transportd. passive transport Correct answer- C: Since the concentrations are so much greater inseaweed than in the surrounding water, iodine must have to move against aconcentration gradient.Hydrogen can be prepared in the laboratory by combining Zn and HCI. In the resultingreaction, the metallic zinc (Zn).a. is changed to another elementb. reacts with the water in the acidc. replaces the combined hydrogen in the acidd. serves as a catalyst Correct answer- C: In the reaction, zinc replaces hydrogen andproduces zinc chloride. Thus, hydrogen gas is released. Zn+2HCI > ZnCI2+H2 This is asingle replacement reaction.Which of the following organisms has a nutritive process most similar to that of animals?a. seaweedb. oak treec. grassd. bread mold Correct answer- D: Bread mold is a fungus. Fungi are unable to maketheir own food and are dependent on other life forms for nutrition. Fungi areheterotrophs. The other choices are all autotrophs.The solubility of a solid in a liquid generally increases with?a. an increase in temperatureb. an increase in pressurec. a decrease in temperatured. a decrease in pressure Correct answer- A: Solubility of a solid in a liquid increaseswith increasing temperature but is unaffected by pressure. Pressure will only affect thesolubility of a gas.

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Which of these substances has the highest boiling point?a. etherb. ethanolc. water.d. glycerol Correct answer- C: Water molecules are attracted to each other by hydrogenbonds. The others are not dipoles, so the attraction between the molecules lis minimal.In humans, if the d aphragm is pushed upward there is a decrease in chest volume, thisdecrease is followed by?a. an increase in pressure in the chest cavity and inhalationb. an increase n pressure in the chest cavity and exhalationc. a decrees in pressure in the chest cavity and inhalationd. a decrease in pressure in the chest cavity and exhalation Correct answer- B: Adecrease in volume results in an increase in pressure (Boyle's law) and thus exhalation.Which of these biological processes includes the other three?a. cell respirationb Krebs cyclec. electron transport chaind. anaerobic splitting of glucose Correct answer- A: Cellular respiration begins with thesplitting of glucose. The products then enter the Krebs cycle and then the electrontransport chain.A 5-year-old and her father each lifted identical chairs from the floor to the table top.Which person did the most work?a. the fatherb. the 5-year-oldc. they both did the same amountd. not enough information is given Correct answer- C: Work done is independent of whois doing it. Since both people move the object over the same distance and use the sameforce, they do the same amount of work.An excess of which of these ions tends to make a solution acidic?a. chlorideb. hydroxylc. hydroniumd. sodium Correct answer- C: Hydronium ions, or H3O+, are essentially hydrogen ionscombined with a nearby water molecule. In essence, acids are characterized by thepresence of hydrogen or hydronium ions.In the classification of two organisms, which of the following is the best evidence of aclose relationship?a. similar number and arrangement of bonesb. similar sequence of amino acids in their proteinsc. similar methods of sexual reproduction

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d. similar methods of cell respiration Correct answer- B: A similarity in amino acidssuggests a similarity in the structure of the DNA and thus a close relationship betweenthe organisms.In Einstein's equation. E=mc2, which does C represent?a. the quantum numbers of the atoms involvedb. the number of coulombsc. the number of calories of heatd. the speed of light Correct answer- D: Einstein's equation, E=MC2, means energy =mass x (speed of light)2the vaporization of solid dry ice to gaseous carbon dioxide by heating is an example of?a. sublimationb. evaporationc. precipitationd. condensation Correct answer- A: Sublimation is the direct vaporization of a solid byheating, without passing through a liquid state.On top of a mountain, the boiling point of water is?a. lower then at sea level, because the atmospheric pressure is higher on the mountainb. lower then at sea level, because the atmospheric pressure is lower on the mountainc. the same as at sea level, because the atmospheric pressure is the same in bothlocationsd. higher then at sea level, because the atmospheric pressure is lower on the mountainsCorrect answer- B: The boiling point of a solution is the temperature at which the vaporpressure is equal to the pressure of the atmosphere.Suppose cube A is 10cm along each edge and cube B is 5 cm along each edge. Whatis the relationship of the volume of cube A to that of Cube B?a. cube A has two times the volume of cube Bb. cube A has four times the volume of cube Bc. cube A has six times the volume of cube Bd. cube A has eight time the volume of cube B Correct answer- D: Cube A has a volumeof 1,000 cm3, whereas cube B has a volume of 125 cm3. Cube A has 8 times thevolume of cube B.Which of these substances is a product of cellular respiration in animals?a. ATPb. RNAc. ethanold. oxygen Correct answer- A: Cellular respiration is an energy-yielding process thatreleases ATP (adenosine triphosphate) from organic molecules.The tiny projections in the small intestine adapted for absorption are called?a. venulesb. villi

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