Biology the Essentials 4th Edition All Chapters
|Complete Guide A+|Questions and Answers 2025
Brand New!!!
_____________________________________________________________________________________
Which component of the cell theory argues against life on Earth evolving from inorganic molecules?
a. All organisms are made of one or more cells.
b. The cell is the fundamental unit of all life.
c. All cells come from preexisting cells.
d. Cells are small in size.
e. All cells are either prokaryotic or eukaryotic.
c. All cells come from preexisting cells.
The scientist (scientists) given credit for adding the third tenet (all cells come from preexisting cells) to
the cell theory is (are)
a. Robert Hooke.
b. Mathias Schleiden and Theodore Schwann.
c. Rudolf Virchow.
d. Carl Woese.
e. J. Craig Venter.
c. Rudolf Virchow.
The original three tenets of the cell theory are that
a. all organisms have DNA, DNA is the fundamental unit of life, and all cells come from preexisting
cells.
b. all organisms are made of one or more cells, the cell is the fundamental unit of life, and all cells
come from preexisting cells.
c. all organisms have DNA, all organisms are made of cells, and all cells produce proteins.
d. all organisms are made of one or more cells, the cell is the fundamental unit of life, and all cells
have a nucleus.
e. all organisms are made of one or more cells, all cells contain DNA, and all cells come from
preexisting cells.
b. all organisms are made of one or more cells, the cell is the fundamental unit of life, and all
cells come from preexisting cells.
The primary structural component of a cell membrane is
a. a cholesterol molecule.
b. a protein molecule.
,c. a phospholipid molecule.
d. an enzyme.
e. a sugar molecule attached to a protein.
c. a phospholipid molecule.
A phospholipid molecule
a. has a hydrophilic head that is repelled by water.
b. has hydrophilic tails that are repelled by water.
c. has a hydrophilic head that is attracted to water.
d. has a hydrophobic head that is repelled by water.
e. has hydrophobic tails that are attracted to water.
c. has a hydrophilic head that is attracted to water.
A cell membrane is not
a. a fluid structure.
b. a rigid structure.
c. a mosaic structure.
d. a bilayered structure.
e. composed of phospholipid molecules.
b. a rigid structure.
The phospholipid bilayer of membranes allows lipids and small, nonpolar molecules to pass across
membranes, but prohibits the passage of ions and polar molecules. This occurs because the
phospholipid tails are
a. always saturated.
b. hydrophilic and hydrophobic.
c. always unsaturated.
d. hydrophilic and selectively permeable.
e. hydrophobic and selectively permeable.
e. hydrophobic and selectively permeable.
A eukaryotic cell
a. has a cell wall with peptidoglycan.
b. is usually smaller than a prokaryotic cell.
c. does not have membrane-bound organelles.
d. has membrane-bound organelles.
e. does not usually have a nucleus.
d. has membrane-bound organelles.
, The three domains in the Woese system of classification are
a. Bacteria, Animalia, and Plantae.
b. Fungi, Protista, and Animalia.
c. Archaea, Eukarya, and Protista.
d. Monera, Bacteria, and Eukarya.
e. Archaea, Bacteria, and Eukarya.
e. Archaea, Bacteria, and Eukarya.
Which of the following is NOT a beneficial ecological role of members of the domain Bacteria?
a. aid in digestion
b. act as decomposers
c. serve as producers
d. produce pharmaceuticals
e. cause mitochondrial diseases
e. cause mitochondrial diseases
The cell wall of bacteria
a. helps prevent the cell from bursting.
b. protects the cell.
c. gives the bacterium a distinctive shape.
d. contains peptidoglycan.
e. All answers are correct.
e. All answers are correct.
What type of membrane protein is involved in creating anchoring junctions between animal cells?
a. transport proteins
b. enzymes
c. recognition proteins
d. adhesion proteins
e. receptor proteins
d. adhesion proteins
What type of membrane protein is involved in passing ions and polar molecules across membranes?
a. transport proteins
b. enzymes
c. recognition proteins
d. adhesion proteins
e. receptor proteins
|Complete Guide A+|Questions and Answers 2025
Brand New!!!
_____________________________________________________________________________________
Which component of the cell theory argues against life on Earth evolving from inorganic molecules?
a. All organisms are made of one or more cells.
b. The cell is the fundamental unit of all life.
c. All cells come from preexisting cells.
d. Cells are small in size.
e. All cells are either prokaryotic or eukaryotic.
c. All cells come from preexisting cells.
The scientist (scientists) given credit for adding the third tenet (all cells come from preexisting cells) to
the cell theory is (are)
a. Robert Hooke.
b. Mathias Schleiden and Theodore Schwann.
c. Rudolf Virchow.
d. Carl Woese.
e. J. Craig Venter.
c. Rudolf Virchow.
The original three tenets of the cell theory are that
a. all organisms have DNA, DNA is the fundamental unit of life, and all cells come from preexisting
cells.
b. all organisms are made of one or more cells, the cell is the fundamental unit of life, and all cells
come from preexisting cells.
c. all organisms have DNA, all organisms are made of cells, and all cells produce proteins.
d. all organisms are made of one or more cells, the cell is the fundamental unit of life, and all cells
have a nucleus.
e. all organisms are made of one or more cells, all cells contain DNA, and all cells come from
preexisting cells.
b. all organisms are made of one or more cells, the cell is the fundamental unit of life, and all
cells come from preexisting cells.
The primary structural component of a cell membrane is
a. a cholesterol molecule.
b. a protein molecule.
,c. a phospholipid molecule.
d. an enzyme.
e. a sugar molecule attached to a protein.
c. a phospholipid molecule.
A phospholipid molecule
a. has a hydrophilic head that is repelled by water.
b. has hydrophilic tails that are repelled by water.
c. has a hydrophilic head that is attracted to water.
d. has a hydrophobic head that is repelled by water.
e. has hydrophobic tails that are attracted to water.
c. has a hydrophilic head that is attracted to water.
A cell membrane is not
a. a fluid structure.
b. a rigid structure.
c. a mosaic structure.
d. a bilayered structure.
e. composed of phospholipid molecules.
b. a rigid structure.
The phospholipid bilayer of membranes allows lipids and small, nonpolar molecules to pass across
membranes, but prohibits the passage of ions and polar molecules. This occurs because the
phospholipid tails are
a. always saturated.
b. hydrophilic and hydrophobic.
c. always unsaturated.
d. hydrophilic and selectively permeable.
e. hydrophobic and selectively permeable.
e. hydrophobic and selectively permeable.
A eukaryotic cell
a. has a cell wall with peptidoglycan.
b. is usually smaller than a prokaryotic cell.
c. does not have membrane-bound organelles.
d. has membrane-bound organelles.
e. does not usually have a nucleus.
d. has membrane-bound organelles.
, The three domains in the Woese system of classification are
a. Bacteria, Animalia, and Plantae.
b. Fungi, Protista, and Animalia.
c. Archaea, Eukarya, and Protista.
d. Monera, Bacteria, and Eukarya.
e. Archaea, Bacteria, and Eukarya.
e. Archaea, Bacteria, and Eukarya.
Which of the following is NOT a beneficial ecological role of members of the domain Bacteria?
a. aid in digestion
b. act as decomposers
c. serve as producers
d. produce pharmaceuticals
e. cause mitochondrial diseases
e. cause mitochondrial diseases
The cell wall of bacteria
a. helps prevent the cell from bursting.
b. protects the cell.
c. gives the bacterium a distinctive shape.
d. contains peptidoglycan.
e. All answers are correct.
e. All answers are correct.
What type of membrane protein is involved in creating anchoring junctions between animal cells?
a. transport proteins
b. enzymes
c. recognition proteins
d. adhesion proteins
e. receptor proteins
d. adhesion proteins
What type of membrane protein is involved in passing ions and polar molecules across membranes?
a. transport proteins
b. enzymes
c. recognition proteins
d. adhesion proteins
e. receptor proteins
