Connect with LearnSmart for Krauskopf: The Physical Universe, 16e
16th Edition
ISBN: 9781259663895
Author: KRAUSKOPF, Konrad B.
Publisher: Mcgraw-hill Higher Education (us)
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Chapter 13, Problem 38MC
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The correct option from given set of options.
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Which one of the following statement is correct for negative feedback?
Select one:
a. In some cases, negative feedback systems carry the mechanism for their own destruction without being fatal to the organism, but to a part of the organism.
b. Negative feedback can move the control parameter to a value outside that normally maintained by positive feedback. c. In a negative feedback a molecular reaction can have such a large drop in free energy that the reaction is essentially irreversible.
d. A negative feedback system is stable over time, maintaining a steady state.
When enzyme action stops due to a build-up of end product, this control is called
A. Negative feedback
B. Competitive inhibition
C. Enzyme induction
D. None of the choices is correct
E. Enzyme repression
Choose the correct answer:
1/ In nanotechnology, the adsorption is used for:
a. Serving as nano-pores in membranes for water desalination
b. Decontamination of pollutants
c. Reducing the increase of temperature in the environment
d. Adding oxygen to the environment
2/ The hydroxyl radical OH is formed when:
a. Moisture H2O loses electron
b. Oxygen is coming from air and combines with H2O
c. The light is exposed to H2O molecules which removed hydrogen
D. The light is exposed to H2O which attracted hydrogen
3/ Which statement is not true about nanomaterials and water:
a. Nanomaterials decontaminate water from pollutants
b. Nanomaterials can detect contaminants in water
c. Nanomaterials can desalinize water
d. Nanomaterials absorb contaminants in water
Chapter 13 Solutions
Connect with LearnSmart for Krauskopf: The Physical Universe, 16e
Ch. 13 - Prob. 1MCCh. 13 - Prob. 2MCCh. 13 - Prob. 3MCCh. 13 - Prob. 4MCCh. 13 - As a class, the alkanes are a. highly reactive b....Ch. 13 - Prob. 6MCCh. 13 - Gasoline is a mixture of a. alkanes b. isomers of...Ch. 13 - Prob. 8MCCh. 13 - Unsaturated hydrocarbon molecules are...Ch. 13 - Prob. 10MC
Ch. 13 - Prob. 11MCCh. 13 - Prob. 12MCCh. 13 - Prob. 13MCCh. 13 - Prob. 14MCCh. 13 - Prob. 15MCCh. 13 - Prob. 16MCCh. 13 - Prob. 17MCCh. 13 - Prob. 18MCCh. 13 - Prob. 19MCCh. 13 - Prob. 20MCCh. 13 - Prob. 21MCCh. 13 - Prob. 22MCCh. 13 - Living cells consist mainly of a. carbohydrates b....Ch. 13 - Prob. 24MCCh. 13 - Prob. 25MCCh. 13 - Photosynthesis produces a. carbohydrates b....Ch. 13 - Prob. 27MCCh. 13 - Prob. 28MCCh. 13 - Prob. 29MCCh. 13 - Prob. 30MCCh. 13 - Prob. 31MCCh. 13 - Lipids are synthesized in plants and animals from...Ch. 13 - Prob. 33MCCh. 13 - Prob. 34MCCh. 13 - Proteins consist of combinations of a. amino acids...Ch. 13 - The number of amino acids important to life is a....Ch. 13 - Prob. 37MCCh. 13 - Prob. 38MCCh. 13 - Prob. 39MCCh. 13 - Prob. 40MCCh. 13 - Each three-nucleotide group in a DNA molecule...Ch. 13 - DNA is involved in which one or more of the...Ch. 13 - Prob. 1ECh. 13 - Prob. 2ECh. 13 - What is the principal bonding mechanism in organic...Ch. 13 - How can the different alkanes in petroleum be...Ch. 13 - Prob. 5ECh. 13 - Why are structural formulas more important in...Ch. 13 - The isomers of a compound have the same chemical...Ch. 13 - Distinguish between unsaturated and saturated...Ch. 13 - How many electrons are shared in a double bond...Ch. 13 - What kind of carbon-carbon bonds are found in...Ch. 13 - How many covalent bonds are present between the...Ch. 13 - In general, how do the reactivities of hydrocarbon...Ch. 13 - Prob. 13ECh. 13 - The alkanes of Sec. 13.2 are saturated...Ch. 13 - The structural formula of propane is given in Sec....Ch. 13 - Why does this structural formula not represent an...Ch. 13 - Why does this structural formula not represent an...Ch. 13 - Prob. 18ECh. 13 - Is it possible for a molecule with the formula...Ch. 13 - Is it possible for a molecule with the formula...Ch. 13 - Is it possible for a molecule with the formula...Ch. 13 - Each molecule of butyne, C4H6, has a triple bond...Ch. 13 - Each molecule of butene, C4H8, has a double bond...Ch. 13 - Prob. 24ECh. 13 - What is the difference between aromatic and...Ch. 13 - Why are all aromatic compounds unsaturated?Ch. 13 - The carbon atoms in normal hexane, C6H14, form a...Ch. 13 - Prob. 28ECh. 13 - When sugar undergoes fermentation to produce...Ch. 13 - To what class of organic compounds does the...Ch. 13 - To what class of organic compounds does the...Ch. 13 - What have the compounds in each of these pairs in...Ch. 13 - What have the compounds in each of these pairs in...Ch. 13 - Which of the following (a) dissolve in water, (b)...Ch. 13 - Compare the properties of a simple ester, for...Ch. 13 - Why do you think the compound whose structure is...Ch. 13 - Prob. 37ECh. 13 - Use structural formulas to show the reaction...Ch. 13 - Give structural formulas for the two isomeric...Ch. 13 - Prob. 40ECh. 13 - The structural formula of acetone is shown in...Ch. 13 - Use structural formulas to show the reaction...Ch. 13 - (a) Give structural formulas for the three isomers...Ch. 13 - Prob. 44ECh. 13 - How does a plant obtain its carbohydrates and...Ch. 13 - What are the products of the oxidation of glucose?...Ch. 13 - What is believed to be the origin of atmospheric...Ch. 13 - The ultimate source of the energy in food is the...Ch. 13 - Why are unsaturated fats liquid at room...Ch. 13 - Why do plants need nitrogen? Why can they not use...Ch. 13 - What are the basic structural units of proteins?...Ch. 13 - How many letters are there in the genetic code by...Ch. 13 - What change in a gene is involved in a mutation?...Ch. 13 - To which class of organic compounds do most of the...
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