Practice_test_Ch370 - ` Practice questions Chapter 35 pg. 1...

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` Practice questions Chapter 35 pg. 1 BSC2011 Fall 2008 Chapter 37: Plant Nutrition (answers on the last page) Chapter Questions 1) Which of the following describes the fate of most of the water taken up by a plant? A) It is used as a solvent. B) It is used as a hydrogen source in photosynthesis. C) It is lost during transpiration. D) It makes cell elongation possible. E) It is used to keep cells turgid. 2) Most of the dry weight of a plant is the result of uptake of A) water and minerals through root hairs. B) water and minerals through mycorrhizae. C) CO 2 through stomata in leaves. D) CO 2 and O 2 through stomata in leaves. E) both A and B 3) Organic molecules make up what percentage of the dry weight of a plant? A) 6% B) 17% C) 67% D) 81% E) 96% 4) In hydroponic culture, what is the purpose of bubbling air into the solute? A) to keep dissolved nutrients evenly distributed B) to provide oxygen to root cells C) to inhibit the growth of aerobic algae D) to inhibit the growth of anaerobic bacteria E) both C and D 5) Which two elements make up more than 90% of the dry weight of plants? A) carbon and nitrogen B) oxygen and hydrogen C) nitrogen and oxygen D) oxygen and carbon E) carbon and potassium 6) The bulk of a plant's dry weight is derived from A) soil minerals. B) CO 2 . C) the hydrogen from H 2 O. D) the oxygen from H 2 O. E) the uptake of organic nutrients from the soil. 7) A growing plant exhibits chlorosis of the leaves of the entire plant. The chlorosis is probably due to a deficiency of which of the following macronutrients? A) carbon B) oxygen C) nitrogen D) calcium E) hydrogen
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` Practice questions Chapter 35 pg. 2 8) Which of the following elements is incorrectly paired with its function in a plant? A) nitrogen—component of nucleic acids, proteins, hormones, coenzymes B) magnesium—component of chlorophyll; activates many enzymes C) phosphorus—component of nucleic acids, phospholipids, ATP, several coenzymes D) potassium—cofactor functional in protein synthesis; osmosis; operation of stomata E) sulfur—component of DNA; activates some enzymes
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Practice_test_Ch370 - ` Practice questions Chapter 35 pg. 1...

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