BSC2010C Exam 1 Review Questions With Complete
Solutions
Describe a process that decreases entropy: Correct Answers
Make yourself a hot cup of tea. Leave it out on the table with a
saucer over it to stop it evaporating. It will go cold. That is, it
has lost heat.
Describe a process that increases entropy: Correct Answers By
adding new arrangements or energy, you increase entropy. A
diamond, for example, has low entropy because the crystal
structure fixes its atoms in place. If you smash the diamond,
entropy increases because the original, single crystal becomes
hundreds of tiny pieces that can be rearranged in many ways.
Explain bonding in terms of valence shell electrons: Correct
Answers It is the outermost shell of each atom.
Explain surface metabolism model: Correct Answers It suggest
that dissolved gases came in contact with minerals lining the
walls of deep-sea vents and formed more complex, organic
molecules.
Explain the chemical properties of carboxyl and amino groups?
Correct Answers They tend to attract or drop a proton,
respectively, when in solution. Amino groups function as bases;
and carboxyl groups act as acids. Both groups participate in
hydrogen bonding.
Explain the difference between a hypothesis and a theory:
Correct Answers A hypothesis is an attempt to explain
, phenomena. A theory is the result of testing a hypothesis and
developing an explanation that is assumed to be true about
something.
Explain the pattern & process components of the cell theory
Correct Answers A pattern describes the natural world/ and
process is responsible for creating that pattern.
Explain the phosphate group: Correct Answers This group
carries two (2) negative charges. When transferred from one
organic compound to another, the change often dramatically
affects the structure of the recipient molecule. They also store
chemical energy that can be used in chemical reactions
Explain the prebiotic soup model: Correct Answers It proposes
that certain molecules were synthesized from gases in the
atmosphere or arrived via meteorites. Afterward it would have
condensed with rain and accumulated in oceans. Also called
organic soup.
Explain the sulfhydryl groups: Correct Answers It consist of
sulfur atom bonded to a hydrogen atom. They are important
because they can link t on another via disulfide (S-S) bonds.
How do ants find their way back to their nest? Correct Answers
Ant pedometer experiment: They use the Sun's position as a
compass, meaning they always know the approximate direction
of the nest relative to the Sun and integrating information from
leg movements.
Solutions
Describe a process that decreases entropy: Correct Answers
Make yourself a hot cup of tea. Leave it out on the table with a
saucer over it to stop it evaporating. It will go cold. That is, it
has lost heat.
Describe a process that increases entropy: Correct Answers By
adding new arrangements or energy, you increase entropy. A
diamond, for example, has low entropy because the crystal
structure fixes its atoms in place. If you smash the diamond,
entropy increases because the original, single crystal becomes
hundreds of tiny pieces that can be rearranged in many ways.
Explain bonding in terms of valence shell electrons: Correct
Answers It is the outermost shell of each atom.
Explain surface metabolism model: Correct Answers It suggest
that dissolved gases came in contact with minerals lining the
walls of deep-sea vents and formed more complex, organic
molecules.
Explain the chemical properties of carboxyl and amino groups?
Correct Answers They tend to attract or drop a proton,
respectively, when in solution. Amino groups function as bases;
and carboxyl groups act as acids. Both groups participate in
hydrogen bonding.
Explain the difference between a hypothesis and a theory:
Correct Answers A hypothesis is an attempt to explain
, phenomena. A theory is the result of testing a hypothesis and
developing an explanation that is assumed to be true about
something.
Explain the pattern & process components of the cell theory
Correct Answers A pattern describes the natural world/ and
process is responsible for creating that pattern.
Explain the phosphate group: Correct Answers This group
carries two (2) negative charges. When transferred from one
organic compound to another, the change often dramatically
affects the structure of the recipient molecule. They also store
chemical energy that can be used in chemical reactions
Explain the prebiotic soup model: Correct Answers It proposes
that certain molecules were synthesized from gases in the
atmosphere or arrived via meteorites. Afterward it would have
condensed with rain and accumulated in oceans. Also called
organic soup.
Explain the sulfhydryl groups: Correct Answers It consist of
sulfur atom bonded to a hydrogen atom. They are important
because they can link t on another via disulfide (S-S) bonds.
How do ants find their way back to their nest? Correct Answers
Ant pedometer experiment: They use the Sun's position as a
compass, meaning they always know the approximate direction
of the nest relative to the Sun and integrating information from
leg movements.
