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36 Cards in this Set
- Front
- Back
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________ are fundamental building blocks of all matter. a) atoms b)molecules c)cells d)organisms |
a) atoms |
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The smallest unit of life is ___________. a) atoms b)molecules c)cells d)organisms |
c) cells |
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All organisms require __________ and ___________ to sustain themselves. a) DNA; energy b) cells; raw materials c) nutrients; energy d) DNA; cells |
c) nutrients; energy |
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________ is a process that maintains conditions in the internal environment within ranges that cells can tolerate. |
Homeostasis |
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DNA ___________. a) guides development and functioning b) is the basis of traits c) is transmitted from parents to offspring d)all of the above |
d) all of the above |
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A process by which an organism produces offspring is called _____________.
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reprodution |
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________ is the transmission of DNA to offspring. |
inheritance |
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A long standing hypothesis that is used to make predictions about other phenomena is called a _____. |
theory |
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Science address only that which is ________. a)alive b)observable c)variable d)indisputable |
b)observable |
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A control group is a) a set of individuals that have a certain characteristic or receive a certain treatment b) that standard against which an experimental group is compared c) the experiment that gives conclusive results |
b) the standard against which an experimental group is compared |
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Fifteen randomly selected students are found to be taller than 6 feet. The researchers concluded that the average height of a student is greater than 6 feet. This is an example of ___________. a) experimental error b) sampling error c) sampling bias d) experimental bias |
b) sampling error |
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Is this statement true or false? Every atoms has an equal number of protons and electrons. |
False (ions are atoms with different numbers of protons and electrons)
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In the periodic table, symbols for the elements are arranged according to __________. a) size b) charge c) mass number d) atomic number |
d) atomic number |
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A(n) ___________ is a molecule into which a radioisotope has been incorporated. a) compound b)tracer c)salt d)acid |
b) tracer |
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The measure of an atom's ability to pull electrons away from another atom is called ________. a) electronegativity b) polarity c) charge d) concentration |
a) electronegativity |
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The mutual attraction of opposite charges holds atoms together as molecules in a(n) ________ bond. a) ionic b) hydrogen c) polar covalent d) nonpolar covalent |
a) ionic |
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Atoms share electrons unequally in a(n) _________ bond. |
polar covalent |
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A(n) _________ substance repels water. a) acidic b) basic c) hydrophobic d) polar |
c) hydrophobic |
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A salt releases ions other than __________ in water. |
H+ or OH- |
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A(n) _______ is dissolved in a solvent. |
solute |
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Hydrogen ions are _______. a) indicated by a pH scale b) unbound protons c) in blood d) all of the above |
d) all of the above |
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When dissolved in water, a(n) _______ donates hydrogen ions and a __________ accepts hydrogen ions. a) acid; base b) base; acid c) buffer; solute d) base; buffer |
a) acid; base |
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Organic molecules consist mainly of ________ atoms. a) carbon b) carbon and oxygen c) carbon and hydrogen d) carbon and nitrogen |
c) carbon and hydrogen |
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Each carbon atom can share pairs of electrons with as many as ________ other atom(s). |
4 |
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_______ groups impart polarity to alcohols. a) hydroxyl b) phosphate c) methyl d) sulfhydryl |
a) hydroxyl |
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________ is a simple sugar (a monosaccharide.) a) glucose b) sucrose c) ribose d) starch e) both a and c f) a, b, and c |
e) both a and c |
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Which three carbohydrates can be built using only glucose monomers? a) starch, cellulose, and glycogen b) glucose, sucrose, and ribose c) cellulose, steroids, and polysaccharides d) starch, chitin, and DNA e) triglycerides, nucleic acids, and polypeptides |
a) starch, cellulose, and glycogen |
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Unlike saturated fats, the fatty acid tails of unsaturated fats incorporate one or more ________. a) phosphate groups b) glycerols c) double bonds d) single bonds |
c) double bonds |
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Is this statement true or false? Unlike saturated fats, all unsaturated fats are beneficial to health because their fatty acid tails kink and do not pack together. |
false
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Steroids are among the lipids with no ______. a) double bonds b) fatty acid tails c) hydrogens d) carbons
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b) fatty acid tails |
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Which of the following is a class of molecules that encompasses all of the other molecules listed. a) triglycerides b) fatty acids c) waxes d) steroids e) lipids f) phospholipids |
e) lipids
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______ are to proteins as ________ are to nucleic acids. a) sugars; lipids b) sugars; proteins c) amino acids; hydrogen bonds d) amino acids; nucleotides |
d) amino acids; nucleotides |
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A denatured protein has lost its __________. a) hydrogen bonds b) shape c) function d) all of the above |
d) all of the above
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__________ consists of nucleotides. a) sugars b) RNA c) DNA d) b and c
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d) b and c |
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Which of the following is not found in DNA? a) amino acids b) sugars c) nucleotides d) phosphate groups |
a) amino acids |
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In the following list, identify the carbohydrate, the fatty acid, the amino acid, and the polypeptide: a)NH2-CHR-COOH b) C6H12O6 c) (methionine)20 d) CH3(CH2)16COOH |
a) amino acids b) carb c) polypeptide d) fatty acid |
