BIL 150 Exam 1 || A+ GRADED.
On a hot day, temperature of land rises more quickly than that of sea. Which of the following
statements best describe the process?
a) specific heat of soil is more than water
b) dry soil soaks more water.
c) specific heat of soil is less than water
d) it rains more over the sea. correct answers specific heat of soil is less than water
We can be sure that a mole of table sugar and a mole of vitamin C are equal in their
________.
a) number of atoms
b) volume
c) number of molecules
d) mass correct answers number of molecules
Molybdenum has an atomic number of 42. Several common isotopes exist, with mass
numbers from 92-100. Based on this information, which of the following is also true of
molybdenum?
a) Molybdenum atoms can have between 50 and 58 electrons.
b)Molybdenum atoms can have between 50 and 58 neutrons.
c)Molybdenum atoms can have between 50 and 58 protons.
d)Isotopes of molybdenum have different numbers of electrons. correct answers
Molybdenum atoms can have between 50 and 58 neutrons.
What kind of bonds are responsible for the unique cohesion, surface tension, and adhesion
properties of water molecules?
a) polar covalent bonding
b) hydrogen bonding
c) ionic bonding
d) hydrophobic bonding correct answers hydrogen bonding
Under which of the following conditions will an atom be the most stable?
a) when they have the fewest possible valence electrons
, b) when all electrons are paired
c) when all of the electron orbitals in the valence shell are filled
d) when they have the maximum number of unpaired electrons correct answers when all of
the electron orbitals in the valence shell are filled
Nitrogen (N) is more electronegative than hydrogen (H). Which of the following is a correct
statement about the atoms in ammonia (NH 3)?
a) Each hydrogen atom has a partial positive charge; the nitrogen atom has a partial negative
charge.
b) Ammonia has an overall negative charge.
c) The nitrogen atom has a partial positive charge; each hydrogen atom has a partial negative
charge.
d) Ammonia has an overall positive charge. correct answers Each hydrogen atom has a partial
positive charge; the nitrogen atom has a partial negative charge.
Which of the following statements describes the interaction of water molecules with
phospholipids?
a) The polar heads interact with water; the nonpolar tails do not.
b) Phospholipids do not interact with water because water is polar and lipids are nonpolar.
c) The polar heads avoid water; the nonpolar tails attract water (because water is polar and
opposites attract).
d) Phospholipids dissolve in water. correct answers The polar heads interact with water; the
nonpolar tails do not.
Systems biology is mainly an attempt to ________.
a) simplify complex problems by reducing the system into smaller, less complex units
b) understand the behavior of entire biological systems by studying interactions among its
component parts
c) build high-throughput machines to rapidly acquire data
d) analyze genomes from different species correct answers understand the behavior of entire
biological systems by studying interactions among its component parts
Which of the following is the quality of a good scientific hypothesis?
a) It relies on controversial factors
On a hot day, temperature of land rises more quickly than that of sea. Which of the following
statements best describe the process?
a) specific heat of soil is more than water
b) dry soil soaks more water.
c) specific heat of soil is less than water
d) it rains more over the sea. correct answers specific heat of soil is less than water
We can be sure that a mole of table sugar and a mole of vitamin C are equal in their
________.
a) number of atoms
b) volume
c) number of molecules
d) mass correct answers number of molecules
Molybdenum has an atomic number of 42. Several common isotopes exist, with mass
numbers from 92-100. Based on this information, which of the following is also true of
molybdenum?
a) Molybdenum atoms can have between 50 and 58 electrons.
b)Molybdenum atoms can have between 50 and 58 neutrons.
c)Molybdenum atoms can have between 50 and 58 protons.
d)Isotopes of molybdenum have different numbers of electrons. correct answers
Molybdenum atoms can have between 50 and 58 neutrons.
What kind of bonds are responsible for the unique cohesion, surface tension, and adhesion
properties of water molecules?
a) polar covalent bonding
b) hydrogen bonding
c) ionic bonding
d) hydrophobic bonding correct answers hydrogen bonding
Under which of the following conditions will an atom be the most stable?
a) when they have the fewest possible valence electrons
, b) when all electrons are paired
c) when all of the electron orbitals in the valence shell are filled
d) when they have the maximum number of unpaired electrons correct answers when all of
the electron orbitals in the valence shell are filled
Nitrogen (N) is more electronegative than hydrogen (H). Which of the following is a correct
statement about the atoms in ammonia (NH 3)?
a) Each hydrogen atom has a partial positive charge; the nitrogen atom has a partial negative
charge.
b) Ammonia has an overall negative charge.
c) The nitrogen atom has a partial positive charge; each hydrogen atom has a partial negative
charge.
d) Ammonia has an overall positive charge. correct answers Each hydrogen atom has a partial
positive charge; the nitrogen atom has a partial negative charge.
Which of the following statements describes the interaction of water molecules with
phospholipids?
a) The polar heads interact with water; the nonpolar tails do not.
b) Phospholipids do not interact with water because water is polar and lipids are nonpolar.
c) The polar heads avoid water; the nonpolar tails attract water (because water is polar and
opposites attract).
d) Phospholipids dissolve in water. correct answers The polar heads interact with water; the
nonpolar tails do not.
Systems biology is mainly an attempt to ________.
a) simplify complex problems by reducing the system into smaller, less complex units
b) understand the behavior of entire biological systems by studying interactions among its
component parts
c) build high-throughput machines to rapidly acquire data
d) analyze genomes from different species correct answers understand the behavior of entire
biological systems by studying interactions among its component parts
Which of the following is the quality of a good scientific hypothesis?
a) It relies on controversial factors
