BIOL 189 Mastering Biology Unit 1 Practice Exam
Questions and Answers
What is the correct order for the hierarchy of biological organization from the least to the
most complex? - -molecule, organelle, cell, tissue, organ, organ system, organism,
population, community, ecosystem
-Which of the following attributes is common to both prokaryotic cells and eukaryotic
cells? - -the use of DNA as the information storage molecule
-How does DNA (deoxyribonucleic acid) encode information? - -in the sequence of
nucleotides.
-Which of these individuals is likely to be most successful in an evolutionary sense? - -an
organism that dies after five days of life but leaves 10 offspring, all of whom survive to
reproduce
-A controlled experiment is one in which - -there are at least two groups, one of which
does not receive the experimental treatment.
-The atoms of different phosphorus isotopes _____. - -have different numbers of neutrons
-In what way are elements in the same column of the periodic table the same? - -They have
the same number of electrons in their valence shell.
-In a single molecule of water, two hydrogen atoms are bonded to a single oxygen atom by
- -polar covalent bonds
-Assume that acid rain has lowered the pH of a particular lake to pH 4.0. What is the
hydroxyl ion concentration of this lake? - -1 × 10-10 mol of hydroxyl ion per liter of lake
water
-Carbon dioxide (CO2) is readily soluble in water, according to the equation CO2 + H2O ↔
H2CO3. Carbonic acid (H2CO3) is a weak acid. Respiring cells release CO2 into the
bloodstream. What will be the effect on the pH of blood as that blood first comes in contact
with respiring cells? - -Blood pH will decrease slightly.
-Variations in the reactive properties of different organic molecules are most closely
associated with _____. - -the presence or absence of functional groups
-What is in a carbonyl functional group of an aldehyde?
(Which molecule shown in the figure has a carbonyl functional group in the form of an
aldehyde?) - -C bond with R group
Questions and Answers
What is the correct order for the hierarchy of biological organization from the least to the
most complex? - -molecule, organelle, cell, tissue, organ, organ system, organism,
population, community, ecosystem
-Which of the following attributes is common to both prokaryotic cells and eukaryotic
cells? - -the use of DNA as the information storage molecule
-How does DNA (deoxyribonucleic acid) encode information? - -in the sequence of
nucleotides.
-Which of these individuals is likely to be most successful in an evolutionary sense? - -an
organism that dies after five days of life but leaves 10 offspring, all of whom survive to
reproduce
-A controlled experiment is one in which - -there are at least two groups, one of which
does not receive the experimental treatment.
-The atoms of different phosphorus isotopes _____. - -have different numbers of neutrons
-In what way are elements in the same column of the periodic table the same? - -They have
the same number of electrons in their valence shell.
-In a single molecule of water, two hydrogen atoms are bonded to a single oxygen atom by
- -polar covalent bonds
-Assume that acid rain has lowered the pH of a particular lake to pH 4.0. What is the
hydroxyl ion concentration of this lake? - -1 × 10-10 mol of hydroxyl ion per liter of lake
water
-Carbon dioxide (CO2) is readily soluble in water, according to the equation CO2 + H2O ↔
H2CO3. Carbonic acid (H2CO3) is a weak acid. Respiring cells release CO2 into the
bloodstream. What will be the effect on the pH of blood as that blood first comes in contact
with respiring cells? - -Blood pH will decrease slightly.
-Variations in the reactive properties of different organic molecules are most closely
associated with _____. - -the presence or absence of functional groups
-What is in a carbonyl functional group of an aldehyde?
(Which molecule shown in the figure has a carbonyl functional group in the form of an
aldehyde?) - -C bond with R group
