i solutios of pure woter, and the concentration of H ions equals the concentrati
ID: 146294 • Letter: I
Question
i solutios of pure woter, and the concentration of H ions equals the concentration of Oif ions in the lease Carbon dioxide (CO2) which is readily soluble in bleo acerding to the equation Co H20M200s What will be the effect on phof blood a Blood pH will decrease slightly S3. As cells of the body conduct cellalar respiration they re Blood pH will increase slightly Blood pli will remain unchanged Blood pH will first increasc, then decrease as COz combines with hemoglobin b. e Blood pli will first decrease, then increase sharply as COn combines with hemoglobin S4. Which of the following statements is true about buffer solutions? AThey maintaln a constant p when acids are added to them but not when baies are added to them maietain a relatively censtane plH of approximately 7 when either acids or bases are added to them . They maintain d. They are found only in living systems and biologica e. They maintain a constant phi when bases are added to them but not when acids are added to them a relatively constant pH when either acids or hases are added to the solution 55. Which of the following are true about living sells? a. All living things are composed of cells b. Cells are the smallest units of living things that demonstrate the characteristics of life s All new cells are prodaced from pre-existing cells by cell division All of the above answer choices are correct e. Only answer choices a and b are correct 56. Which of the following is a characteristic of all living organisms? a evolutionary adaptation b. order s,energy processing All ofthe above answer choices are characseristies of living things . Only answer choices b and e are characteristics of living things 57. The elements presemt in all organic molecules are which of the following? byhogenand oxygen b. oxygen and carbon e carbon and hydrogen d. nitrogen and carbon e.carbon and oxygen 58. Which experimental approach is taken in current biological studies? simple organie compounds can be synthesized in the laboratory from inoerganic precursors, but complex organic b. a life force ultimately controls the activities of living organisms and this life force canmot be stadied by physical c. living organisms are composed of the same elements present in nonliving things, plus a few special trace elements d. living organisms can be understood in terms of the same physical and chemical laws that can be used to explain compounds like carbohydrates and protcins can be synthesized only by living organisms or chemical methods found only in living organisms or their products all natural phenomena 59. Which four of the 25elements ofliving things make up approximately96% ofliving matter? a carbon, sodium, hydrogen, nitrogen b. carbon, oxyssn, phosphorus, hydrogen oxygen, hydrogen, calcium, nitrogen hydrogen, carbon, nitrogen, oxygen carbon, oxygen, nitrogen, caleium e. 60. Which of the following answers most correctly describes the 2P, orbital of an atom? orbita a. can have a maximum of 8 electrons b. can have a maximum of 2 electrons c. it is one of four electron orbitals in the second energy level d answer choices a and c are correct e answer choices b and e are correct last 101Explanation / Answer
53. D) When CO2 is diffused in plasma membrane and forms bicarbonate. Then it forms carbonic acids which increases pH then buffering takes place decreasing the pH.
54. b) Buffer maintains pH approximately at 7 when either base or acid is added.
55. D) All of the answers are correct.
56. D) evolutionary adaptation, energy processing and order are all characteristics of a living being.
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