Drag the appropriate labels to their respective targets.
Drag the appropriate labels to their respective targets.
Drag the appropriate labels to their respective targets.
Drag the appropriate labels to their respective targets.
Drag the appropriate labels to their respective targets.
Drag the appropriate labels to their respective targets.
Drag the appropriate labels to their respective targets.
Which of the following lists, in correct order, the phases of interphase?
G1, S, and G2
Which of the following lists, in correct order, the phases of mitosis?
prophase, metaphase, anaphase, telophase
During which of the following phases does DNA replication occur?
Synthesis
During which of the following phases does chromatin condense and become chromosomes?
prophase
Which of the following describes tight junctions?
junctions among epithelial cells lining the digestive tract
The glycocalyx is often referred to as the "cell coat," which is somewhat fuzzy and sticky with numerous cholesterol chains sticking out from the surface of the cell membrane.
False
Which of the following forms of vesicular transport processes are used by flu viruses, diphtheria, and cholera toxins to enter our cells?
receptor-mediated endocytosis
Which of the following statements is correct regarding net diffusion?
The greater the concentration gradient, the faster the rate.
Diffusion movement always occurs from areas of greater to areas of lesser concentration.
True
Aquaporins are believed to be present in red blood cells and kidney tubules, but not in any other cells in the body.
False
In their resting state, all body cells exhibit a resting membrane potential ranging from -50 to about +50 millivolts.
False
Which of the following is NOT a characteristic of peroxisomes?
They contain powerful enzymes called acid hydrolases.
Which of these is an inclusion, not an organelle?
melanin
Microtubules are hollow tubes made of subunits of the protein tubulin.
True
Some hormones enter cells via ________.
receptor-mediated endocytosis
The indicated protein interacts with DNA to form the structural unit of chromatin called a ______.
nucleosome
Which letter is pointing to an mRNA molecule?
B
Which of the following names the three main parts of a human cell?
cytoplasm, plasma membrane, and nucleus
Match the following.
Drag the appropriate labels to their
respective targets.
The RNA responsible for bringing the amino acids to the ribosome for protein formation is ________.
tRNA
Cholesterol helps to stabilize the cell membrane while decreasing the mobility of the phospholipids.
True
Which of the following is characteristic of cilia?
They are whiplike, motile cellular extensions that occur in large numbers on the exposed surfaces of certain cells.
What type of protein is indicated by the arrow?
histone
Mitosis ________.
is division of the nucleus
Which of the following statements is correct regarding RNA?
Messenger RNA, transfer RNA, and ribosomal RNA play a role in protein synthesis.
The figure is of which cellular organelle?
a mitochondrion
Phagocytosis is a form of exocytosis.
False
________ is the diffusion of a solvent, such as water, across a selectively permeable membrane.
Osmosis
Lipid rafts, found in the cell outer membrane surface, are concentrating platforms for certain receptor molecules or for protein molecules needed for cell signaling.
True
What is the specific role of the enzyme indicated by B during the formation of the new DNA strands?
joining the nucleotides that form the new DNA strand
If a tRNA had an AGC anticodon, it could attach to a(n) ________ mRNA codon.
UCG
Some hormones enter cells via ________.
receptor-mediated endocytosis
The nucleolus ________.
is the site of ribosome assembly in a cell
Which of the following is NOT a concept of the cell theory?
Cells are given life through a process known as spontaneous generation.
Which of the following statements correctly describes the plasma membrane?
It is a dynamic fluid structure that is in constant flux.
Which of the following is FALSE regarding the membrane potential?
The resting membrane potential is maintained solely by passive transport processes.
Solutions with a higher concentration of solutes than the concentration inside the cells are __________.
hypertonic
Interstitial fluid represents one type of extracellular material.
True
What is the function of the indicated protein?
to allow DNA to form a compact structure
What is the difference between active and passive transport across the plasma membrane?
Active transport is ATP dependent, whereas passive transport uses only the kinetic energy of the particles for movement across the plasma membrane.
________ is a molecular "ferry" that brings amino acids to the ribosome to build a protein.
t-RNA
Apoptosis is programmed cell suicide; cancer cells do not undergo this process.
True
The structure indicated by B is ______.
the Golgi apparatus
If cells are placed in a hypertonic solution containing a solute to which the membrane is impermeable, what could happen?
The cells will lose water and shrink.
DNA transcription is another word for DNA replication.
False
Why is the selective permeability of the plasma membrane essential for normal cell function?
Selective permeability allows cells to exclude some substances and allow others to pass into or out of the cell.
In their resting state, all body cells exhibit a resting membrane potential; therefore, all cells are polarized.
True
In which stage of mitosis do the identical sets of chromosomes uncoil and resume their chromatin form?
telophase
Which of the following is a principle of the fluid mosaic model of cell membrane structure?
Phospholipids form a bilayer that is largely impermeable to water-soluble molecules.
Each daughter cell resulting from mitotic cell division has exactly as many chromosomes as the parent cell.
True
A red blood cell placed in pure water would ________.
swell and burst
The main component of the cytosol is ________.
water
Which type of cell junction acts as anchors and distributes tension through a cellular sheet and reduces the chance of tearing when it is subjected to great mechanical stress?
desmosomes
What must happen before a body cell can begin mitotic cell division?
Its DNA must be replicated exactly so that identical copies of the cell's genes can be passed on to each of its offspring.
What process allows for the production of molecule B from a template consisting of molecule A?
transcription
The functions of centrioles include ________.
organizing the mitotic spindle in cell division
Which vesicular transport process occurs primarily in some white blood cells and macrophages?
phagocytosis
Molecule B and molecule C are expected to interact within which of the following cellular locations?
ribosome
Which of the following is a function of a plasma membrane protein?
molecular transport through the membrane
What is the primary function of the mitochondria?
They are the main sites of ATP production.
The electron microscope has revealed that one of the components within the cell consists of pinwheel array of 9 triplets of microtubules arranged to form a hollow tube. This structure is a ________.
centriole
Facilitated diffusion requires a carrier or channel protein.
True
A gene can best be defined as ________.
a segment of DNA that carries the instructions for one polypeptide chain
What are the two basic steps of polypeptide synthesis?
transcription and translation
Which of the following statements is TRUE?
During exocytosis, substances from inside the cell are moved outside.
Lysosomes perform digestive functions within a cell.
True
The plasma membrane is made primarily of ________.
phospholipids
Some hormones enter cells via ________.
receptor-mediated endocytosis
Which of the following statements is correct regarding RNA?
Messenger RNA, transfer RNA, and ribosomal RNA play a role in protein synthesis.
If cells are placed in a hypertonic solution containing a solute to which the membrane is impermeable, what could happen?
The cells will lose water and shrink.
In their resting state, all body cells exhibit a resting membrane potential; therefore, all cells are polarized.
True
Which of the following is characteristic of cilia?
They are whiplike, motile cellular extensions that occur in large numbers on the exposed surfaces of certain cells.
What is the primary function of the mitochondria?
They are the main sites of ATP production.
What is the specific role of the enzyme indicated by B during the formation of the new DNA strands?
joining the nucleotides that form the new DNA strand
Facilitated diffusion requires a carrier or channel protein.
True
________ is a molecular "ferry" that brings amino acids to the ribosome to build a protein.
t-RNA
Solutions with a higher concentration of solutes than the concentration inside the cells are __________.
hypertonic
What is the difference between active and passive transport across the plasma membrane?
Active transport is ATP dependent, whereas passive transport uses only the kinetic energy of the particles for movement across the plasma membrane.
Interstitial fluid represents one type of extracellular material.
True
________ is the diffusion of a solvent, such as water, across a selectively permeable membrane.
Osmosis
The genetic information is coded in DNA by the regular alternation of sugar and phosphate molecules.
False
The RNA responsible for bringing the amino acids to the ribosome for protein formation is ________.
tRNA
During DNA replication, the covalent bonding of nucleotides into a new strand of DNA is performed by ________.
DNA polymerase
The orderly sequence of the phases of mitosis is prophase, metaphase, anaphase, and telophase.
True
What type of protein is indicated by the arrow?
histone
Once solid material is phagocytized and taken into a vacuole, which of the following statements best describes what happens?
A lysosome combines with the vacuole and digests the enclosed solid material.
Which vesicular transport process occurs primarily in some white blood cells and macrophages?
phagocytosis
Which set of membrane proteins in the figure depicts the transport of solute molecules?
A
Lysosomes perform digestive functions within a cell.
True
The nucleolus ________.
is the site of ribosome assembly in a cell
Some types of cells move freely through the body, while others are bound into tightly knit communities.
True
If a tRNA had an AGC anticodon, it could attach to a(n) ________ mRNA codon.
UCG
Passive membrane transport processes include ________.
movement of a substance down its concentration gradient
What is a function of the enzyme indicated by structure A?
breaking the bonds between complementary base pairs
The figure is of which cellular organelle?
a mitochondrion
DNA transcription is another word for DNA replication.
False
Which of the following is a function of a plasma membrane protein?
molecular transport through the membrane
There is only one cell type in the human body that has a flagellum.
True
Why is the selective permeability of the plasma membrane essential for normal cell function?
Selective permeability allows cells to exclude some substances and allow others to pass into or out of the cell.
Diffusion is a form of active transport.
False
The main component of the cytosol is ________.
water
What process allows for the production of molecule B from a template consisting of molecule A?
transcription
Which of the following is FALSE regarding the membrane potential?
The resting membrane potential is maintained solely by passive transport processes.
A gene can best be defined as ________.
a segment of DNA that carries the instructions for one polypeptide chain
What are the two basic steps of polypeptide synthesis?
transcription and translation
Which type of cell junction acts as anchors and distributes tension through a cellular sheet and reduces the chance of tearing when it is subjected to great mechanical stress?
desmosomes
What process is indicated by C?
exocytosis of secreted proteins
The structure indicated by B is ______.
the Golgi apparatus
A red blood cell placed in pure water would ________.
swell and burst
In which stage of mitosis do the identical sets of chromosomes uncoil and resume their chromatin form?
telophase
Lipid rafts, found in the cell outer membrane surface, are concentrating platforms for certain receptor molecules or for protein molecules needed for cell signaling..
True
The electron microscope has revealed that one of the components within the cell consists of pinwheel array of 9 triplets of microtubules arranged to form a hollow tube. This structure is a ________.
centriole
Which of the following statements is TRUE?
During exocytosis, substances from inside the cell are moved outside.
Which of the following statements correctly describes the plasma membrane?
It is a dynamic fluid structure that is in constant flux.
The folded membranes indicated by B are the site of ______.
enzymes involved in cellular respiration
Which of the following would not be a constituent of a plasma membrane?
messenger RNA