BIL 150 Exam 1 Questions with Correct Answers
Question 1:
On a hot day, temperature of land rises more quickly than that of sea. Which of the following
statements best describe the process?
specific heat of soil is more than water dry soil soaks more water.
specific heat of soil is less than water it rains more over the sea.
Answer:
specific heat of soil is less than water
Question 2:
We can be sure that a mole of table sugar and a mole of vitamin C are equal in their . number of
atoms volume number of molecules mass
Answer:
number of molecules
Question 3:
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?
Molybdenum atoms can have between 50 and 58 electrons. Molybdenum atoms can have
between 50 and 58 neutrons. Molybdenum atoms can have between 50 and 58 protons.
Isotopes of molybdenum have different numbers of electrons.
Answer:
Molybdenum atoms can have between 50 and 58 neutrons.
Question 4:
What kind of bonds are responsible for the unique cohesion, surface tension, and adhesion
properties of water molecules?
polar covalent bonding hydrogen bonding ionic bonding hydrophobic bonding
Answer:
hydrogen bonding
Question 5:
Under which of the following conditions will an atom be the most stable? when they have the
fewest possible valence electronswhen all electrons are pairedwhen all of the electron orbitals
, in the valence shell are filled when they have the maximum number of unpaired electrons
Answer:
when all of the electron orbitals in the valence shell are filled
Question 6:
Under which of the following conditions will an atom be the most stable? when they have the
fewest possible valence electrons
when all electrons are paired
when all of the electron orbitals in the valence shell are filled when they have the maximum
number of unpaired electrons
Answer:
when all of the electron orbitals in the valence shell are filled
Question 7:
Nitrogen (N) is more electronegative than hydrogen (H). Which of the following is a correct
statement about the atoms in ammonia (NH 3)?
Each hydrogen atom has a partial positive charge; the nitrogen atom has a partial negative
charge. Ammonia has an overall negative charge.
The nitrogen atom has a partial positive charge; each hydrogen atom has a partial negative
charge. Ammonia has an overall positive charge.
Answer:
Each hydrogen atom has a partial positive charge; the nitrogen atom has a partial negative
charge.
Question 8:
Which of the following statements describes the interaction of water molecules with
phospholipids? The polar heads interact with water; the nonpolar tails do not.
Phospholipids do not interact with water because water is polar and lipids are nonpolar.
The polar heads avoid water; the nonpolar tails attract water (because water is polar and
opposites attract).
Phospholipids dissolve in water.
Answer:
The polar heads interact with water; the nonpolar tails do not. Systems biology is mainly an
attempt to .
simplify complex problems by reducing the system into smaller, less complex units
understand the behavior of entire biological systems by studying interactions among its
component parts
build high-throughput machines to rapidly acquire data
Question 1:
On a hot day, temperature of land rises more quickly than that of sea. Which of the following
statements best describe the process?
specific heat of soil is more than water dry soil soaks more water.
specific heat of soil is less than water it rains more over the sea.
Answer:
specific heat of soil is less than water
Question 2:
We can be sure that a mole of table sugar and a mole of vitamin C are equal in their . number of
atoms volume number of molecules mass
Answer:
number of molecules
Question 3:
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?
Molybdenum atoms can have between 50 and 58 electrons. Molybdenum atoms can have
between 50 and 58 neutrons. Molybdenum atoms can have between 50 and 58 protons.
Isotopes of molybdenum have different numbers of electrons.
Answer:
Molybdenum atoms can have between 50 and 58 neutrons.
Question 4:
What kind of bonds are responsible for the unique cohesion, surface tension, and adhesion
properties of water molecules?
polar covalent bonding hydrogen bonding ionic bonding hydrophobic bonding
Answer:
hydrogen bonding
Question 5:
Under which of the following conditions will an atom be the most stable? when they have the
fewest possible valence electronswhen all electrons are pairedwhen all of the electron orbitals
, in the valence shell are filled when they have the maximum number of unpaired electrons
Answer:
when all of the electron orbitals in the valence shell are filled
Question 6:
Under which of the following conditions will an atom be the most stable? when they have the
fewest possible valence electrons
when all electrons are paired
when all of the electron orbitals in the valence shell are filled when they have the maximum
number of unpaired electrons
Answer:
when all of the electron orbitals in the valence shell are filled
Question 7:
Nitrogen (N) is more electronegative than hydrogen (H). Which of the following is a correct
statement about the atoms in ammonia (NH 3)?
Each hydrogen atom has a partial positive charge; the nitrogen atom has a partial negative
charge. Ammonia has an overall negative charge.
The nitrogen atom has a partial positive charge; each hydrogen atom has a partial negative
charge. Ammonia has an overall positive charge.
Answer:
Each hydrogen atom has a partial positive charge; the nitrogen atom has a partial negative
charge.
Question 8:
Which of the following statements describes the interaction of water molecules with
phospholipids? The polar heads interact with water; the nonpolar tails do not.
Phospholipids do not interact with water because water is polar and lipids are nonpolar.
The polar heads avoid water; the nonpolar tails attract water (because water is polar and
opposites attract).
Phospholipids dissolve in water.
Answer:
The polar heads interact with water; the nonpolar tails do not. Systems biology is mainly an
attempt to .
simplify complex problems by reducing the system into smaller, less complex units
understand the behavior of entire biological systems by studying interactions among its
component parts
build high-throughput machines to rapidly acquire data
