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50 Cards in this Set

  • Front
  • Back
Which of the following is not true? Flying Foxes...
A) have excellent vision
B) are actually bats
C) eat fruit
D) use echolation
E) are stong flyers
D) use echolation
Which one of the following is threatening the survival of gray headed flying foxes?
A) the increase in the amount of artifical light produced in and around cities at night
B) a dramatic decline in the number of insects due to widespread use of pesticides
C) the spread of viruses and other forms of disease associated with the shipping of produce
D) depletion of the ozone resulting in an increase in the number of cancers in flying animals
E) the cleaning of many wooded areas for agriculture and urban expansion
E) the cleaning of many wooded areas for agriculture and urban expansion
Life is organized in a hierarchial fashion. Which one of the following sequences illustrates that hierarchy as it increases in complexity?
A) ecosystem, population, organ system, cell, community, molecule, organ, organism, tissue
B) cell, molecule, organ system, organ, population, tissue, organism, ecosystem, community
C) organism, organ system, tissue, population, organ, community, cell, ecosystem, molecule
D) molecule, cell, tissue, organ, organ system, organism, population, community, ecosystem
E) ecosystem, molecule, cell, tissue, organism, organ system, organ, community
D) molecule, cell, tissue, organ, organ system, organism, population, community, ecosystem
The tree in your backyard is home to two cardinals, a colony of ants, a wasp's nest, two squirrels, and millions of bacteria. Together, all these organisms are:
A) a species
B) a community
C) a population
D) an ecosystem
E) a community and a population
B) a community
Which one of the following is a kingdom within the Domain Eukarya?
A) Viruses
B) Monera
C) Fungi
D) Archaea
E) Protista
C) Fungi
A scientist examining a group of cells under the microscope notices the presence of nuclei within these cells. Chemical tests reveal that each cell is surrounded by a wall composed of cellulose. These cells must come from an organism that is a member of the Kingdom...
A) Monera
B) Protista
C) Plantae
D) Fungi
E) Animalia
C) Plantae
Members of the Kingdom Fungi...
A) include the mushrooms
B) include the yeasts
C) decompse the remains of dead organisms and absorb nutrients from the leftovers
D) include the mushrooms and yeasts, and decompose the remains of dead organisms and absorb nutrients from the leftovers
E) use photosynthesis to produce their own food
D) include the mushrooms and yeasts, and decompose the remains of dead organisms and absorb nutrients from the leftovers
Members of the Kingdom Animalia...
A) can obtain their food either by absorption or by photsynthesis
B) are composed of cells that lack a cell wall
C) are composed of cells that are surrounded by a cell wall
D) are composed of cells that lack a cell membrane
E) are composed of cells that are surrounded by a cell wall and that lack a cell membrane
B) are composed of cells that lack a cell wall
The ultimate source of energy flowing into nearly all ecosystems is
A) wind
B) sunlight
C) electricity
D) geothermal vents
E) radiocativity
B) sunlight
Which one of the following is not a trace element in the human body?
A) fluorine
B) nitrogen
C) zinc
D) manganese
E) iodine
B) nitrogen
The five most common elements in living organisms are
A) C, H, O, Na, Cl
B) C, H, O, Na, Ca
C) C, H, O, N, Ca
D) C, N, O, Na, Cl
E) C, N, O, Ca, Fe
C) C, H, O, N, Ca
Matter...
A) is what life is composed of
B) occupies space
C) has mass
D) is composed of elements
E) All of the choices are correct
E) All of the choices are correct
A compound ...
A) is a pure element
B) is less common than a pure element
C) contains two or more elements in a fixed ratio
D) is exemplified by sodium
E) is a solution
C) contains two or more elements in a fixed ratio
The nucleus of an atom contains:
A) protons and neutrons
B) protons and electrons
C) only neutrons
D) only protons
E) only electrons
A) protons and neutrons
Electrons move about the nucleus of an atom the same way that...
A) insects fly around a bright lamp at night
B) cars are parked along the sides of a street
C) boats cross a lake
D) people pass each other along a sidewalk
E) birds migrate to a new winter home
A) insects fly around a bright lamp at night
The atom sodium contains 11 electrons, 11 protons, and 12 neutrons. What is the mass number of a sodium?
A) 0
B) 11
C) 22
D) 23
E) 34
D) 23
The atomic number of an atom is...
A) the number of protons in the atom
B) the number of electrons in the atom
C) the number of neutrons in the atom
D) the number of protons, electrons, and neutrons in the atom
E) the net electrical charge of the atom
A) the number of protons in the atom
Typically, nitrogen atoms are composed of seven electrons, seven protons, and seven neutrons. An isotope of nitrogen could...
A) be positively charged
B) be negatively charged
C) have more than seven electrons and more than seven protons
D) have more more than seven each of electrons, protons, and neutrons
E) have more than seven neutrons
E) have more than seven neutrons
A radioactive isotope is one that...
A) is stable
B) decays
C) has more protons that the common variant of the element
D) has more electrons that the common variant of the element
E) has the same atomic mass, but a different atomic number that the common variant of the element
B) decays
Which of the following statements about radioactive isotopes is/are true?
A) the nuclei of radioactive isotopes are unusually stable, but the atoms tend to lose electrons
B) when given a choice between radioactive and nonradioactive isotopes of the same atom, living cells are more likely to incorporate the radioactive isotopes into their structure
C) the tracers typicallys used for diagnosing medical problems remain radioactive in the body for a number of years, but give off very low levels of radioactive energy
D) the energy emitted by radioactive isotopes can break chemical bonds and cause molecular damage in cells
E) All of the choices are true
D) the energy emitted by radioactive isotopes can break chemical bonds and cause molecular damage in cells
When full, the innermost electron shell of an atom contains ______electrons, and the outermost shell contains ______electrons.
A) 2...2
B) 2...8
C) 4...8
D) 8...2
E) 8...8
B) 2...8
A(n) ______ forms when two atoms share electrons
A) ion
B) polar covalent bond
C) covalent bond
D) ionic bond
E) polar covalent bond or covalent bond
E) polar covalent bond or covalent bond
What is the fundamental difference between covalent and ionic bonding?
A) in a covalent bond, the partners have identical electronegativity, in an ionic bond, one of them is more electronegative
B) in a covalent bond, the partners share a pair of electrons, in an ionic bond , one partner catures an electron from the other
C) In covalent bonding, both partners end up with filled outer electron shells, in ionic bonding, one partner does and the other does not
D) Covalent bonding involves only the outer electron shell, ionic bonding also involves the new inner electron shell
E) Covalent bonds form between atoms of the same element, ionic bonds, between atoms of different elements
B) in a covalent bond, the partners share a pair of electrons, in an ionic bond , one partner catures an electron from the other
A water molecule (H-O-H) is held together by...
A) an ionic bond
B) a single covalent bond
C) a double covalent bond
D) a polar covalent bond
E) hydrogen bonds
D) a polar covalent bond
________ are weak bonds that are not strong enough to hold atoms together to form molecules but are strong enough to form bridges between molecules
A) ionic bonds
B) Covalent bonds
C) Polar covalents bonds
D) Hydrogen bonds
E) Anionic bonds
D) Hydrogen bonds
Water molecules stick to other water molecules because...
A) water molecules are neutral, and neutral molecules are attracted to each other
B) hydrogen bonds form between the hydrogen atoms of one water molecule and the oxygen atoms of other water molecules
C) covalent bonds form between the hydrogen atoms of one water molecule and the oxygen atoms of other water molecules
D) the hydrogen atoms of adjacent water molecules are attracted to one another
E) the oxygen atoms of adjacent water molecules are attracted to one another
B) hydrogen bonds form between the hydrogen atoms of one water molecule and the oxygen atoms of other water molecules
The ability of water molecules to form hydrogen bonds with other water molecules is critical to ...
A) evaporative cooling of skin surfaces
B) the movement of water from the roots of a tree to its leaves
C) the milder temperatures of coastal regions when compared to inland areas
D) the ability of certain insects to walk on the surface of water
E) all of these factors
E) all of these factors
As ice melts...
A) hydrogen bonds are broken
B) water molecules becomes tightly packed
C) the water becomes less dense
D) covalents bonds forms
E) All of the choices are correct
A) hydrogen bonds are broken
You've made a hot drink by dissolving a teaspoon of instant coffee and a teaspoon of sugar in a cup of hot water. Which of the following is/are true?
A) You've just prepared an aqueous solution
B) The water is the solute portion of the drink
C) The instant coffee and sugar are solvents
D) The instant coffee and sugar dissolve because they have no electropositive or electronegative regions to repel the electropositive and electronegative regions of the water molecules
E) All of the choices are correct
A) You've just prepared an aqueous solution
A solute is
A) the dissolving agent of the solution
B) the liquid portion of a solution
C) usually water in living cells
D) the substance that is dissolved in a solution
E) the dissolving agent of a solution which is usually oxygen in living cells
D) the substance that is dissolved in a solution
A pharmaceutical company hires a chemist to analyze the purity of the water being used in it's drug preparations. If the water is pure, the chemist would expect to find...
A) only molecules of H20
B) H20 molecules and H1 ions
C) H20 molecules and OH- ions
D) H20 molecules, H1 ions, and OH ions
E) only H1 ions and OH ions
D) H20 molecules, H1 ions, and OH ions
A solution with a pH of 7 is...
A) strongly acidic
B) weakly acidic
C) neutral
D) weakly basic
E) strongly basic
C) neutral
A solution with a pH of 1 is...
A) stongly acidic
B) weakly acidic
C) neutral
D) weakly basic
E) stongly basic
A) stongly acidic
A buffer...
A) is an acid that is ude to offest overly basic conditions in the body
B) is a base that is used to offset overly acidic conditions in the body
C) donates OH- ions when conditions becomes too acidic and accepts OH- ions when conditions become to basic.
D) donates H+ ions when conditions becomes too acidic and accepts H+ ions when conditions become to basic.
E)donates OH- ions when conditions becomes too basic and accepts OH- ions when conditions become to acidic.
D) donates H+ ions when conditions becomes too acidic and accepts H+ ions when conditions become to basic.
The emission of ______ and ______ are primarily responsible for acid precipitation.
A) carbon dioxide...methane
B) CFCs...bromides
C) nitrogen oxides...sulfur oxide
D) halones...CFCs
E) carbon dioxide...ozone
C) nitrogen oxides...sulfur oxide
What can each of us to do to decrease the production of acid precipitation? We can...
A) drive more fuel-efficient automobiles
B) decrease our consumption of coal generated electricity
C) encourage the use of alternative energy resources such as solar, wind, and geothermal energy
D) whenever possible, walk or ride a bicycle instead of driving a car
E) All of the choices are ways to decrease the production of acid precipitation
E) All of the choices are ways to decrease the production of acid precipitation
In the equation 2 H2 + O2 = 2 H2O, the H2 molecules are ______ and the H2O molecules are _______.
A) reactants...products
B) products...reactants
C) reactants...reactants
D) products...products
E) None of the choices are correct
A) reactants...products
Hydrocarbons...
A) are inorganic compounds
B) are composed of carbon atoms that are attached to hydrogen skeletons
C) contain only carbon and hydrogen atoms
D) consist of atoms linked exclusively by single bonds
E) All of the choices are correct
C) contain only carbon and hydrogen atoms
Organic compounds...
A) always contain carbon
B) are synthesized by cells
C) always contain carbon and are synthesized by cells
D) can only be synthesized in a laboratory
E) always contain nitrogen
C) always contain carbon and are synthesized by cells
You now know the old cliche "oil and water don't mix" is true. Why?
A) Oil exhibits polarity and water does not
B) Water exhibits polarity and oil does not
C) Oil is hydrophilic
D) Water is hydrophilic
E) Oil is an organic compound and water is not
B) Water exhibits polarity and oil does not
A hydroxyl group is
A) also called a carbonyl group
B) characteristic of proteins
C) hydrophobic
D) characteristic of alcohols
E) None of the choices are correct
D) characteristic of alcohols
Which one of the following is an amino group?
A) OH
B) NH2
C) COOH
D) CO
E) CH3
B) NH2
Which list below consists of only polymers?
A) sugars, amino acids, nucleic acids, lipids
B) proteins, lipids, nucleic acids, amino acids
C) proteins, lipids, nucleic acids, polysaccharides
D) proteins, lipids, nucleotides, sugars
E) polysaccharides, lipids, amino acids, nucleic acids
C) proteins, lipids, nucleic acids, polysaccharides
Sucrose is formed...
A) from two glucose molecules
B) from two monosaccharides by dehydration synthesis
C) when ionic bonds link two monosaccharides
D) when water molecules are added to two monosaccharides
E) when glucose and lactose are combined
B) from two monosaccharides by dehydration synthesis
A disaccharide forms when...
A) two monosaccharides join by dehydration synthesis
B) two starches join by dehydration synthesis
C) two monosaccharides join by hydrolysis
D) two starches join by hydrolysis
E) a starch and a monosaccharide join by dehydration synthesis
A) two monosaccharides join by dehydration synthesis
Molecules that taste sweet...
A) are all carbohydrates
B) include at least one carbohydrate monomer
C) have a shape that binds tightly to sweet taste receptors
D) cause carbohydrates to break down into monomers that trigger the sweet taste reaction
E) must bind to the sweet and bitter receptors
C) have a shape that binds tightly to sweet taste receptors
Which one of the following lists contains only polysaccharides?
A) sucrose, starch, and cellulose
B) starch, amino acids, and glycogen
C) cellulose, starch, and glycogen
D) nucleotides, glycogen, and cellulose
E) fructose, cellulose, and glucose
C) cellulose, starch, and glycogen
Cellulose differs from starch in that...
A) the monomers of cellulose are held together by covalent bonds, whereas the monomers of starch are held together by hydrogen bonds.
B) glycogen is formed by plants and cellulose by animals
C) most animals cannot break down cellulose, whereas starch is easily digested
D) starch is made of glucose monomers, whereas cellulose is made of fructose monomers
E) All of the choices are correct
C) most animals cannot break down cellulose, whereas starch is easily digested
Foods that are high in fiber are most likely derived from...
A) plants
B) dairy products
C) meat
D) fish
E) any of these choices
A) plants
Fatty acids with double bonds between some of their carbons are said to be...
A) unsaturated
B) saturated
C) completely hydrogenated
D) triglycerides
E) monoglycerides
A) unsaturated