Cells: The Living Units
- 1.what is the importance of the glycocalyx in cell interactions?
- A.
The relative concentration of the substance in different areas determines the direction of diffusion
- B.
Diffusion is driven by kinetic energy of the molecules
- C.
The sugar residues of the glycocalyx provide recognizable biological markers for the cells to recognize each other
- D.
The heart has desmasomes that secure cardiac cells together
- 2.which two types of cell junctions would you expect to find between muscle cells of the heart?
- A.
Diffusion is driven by kinetic energy of the molecules
- B.
Junction occures from regions of high concentration to regions of low concentration
- C.
Meditated diffusion the difusing substance attatches to a membrane (protien) carrier that moves it across the membrane
- D.
The heart has desmasomes (anchoring junctions) that secure cardiac cells together as the heart works and gap junctions (communicating junctions) that allow ions to flow from cardiac cell to cardiac cell
- 3.What is the energy source for all types of diffusion?
- A.
Diffusion is driven by kinetic energy of the molecules
- B.
Diffusion is slowed by kinetic energy of the molecules
- C.
Diffusion is hydrolized by kinetic energy of the molecules
- D.
Diffusion is synthesized by kinetic energy of the molecules
- 4.what are the two types of facilitated diffusion and how do they differ?
- A.
Ionic and covalent bonding
- B.
The channel
- C.
In carrier
- D.
Open and closed gateways
- 5.what determines the direction of any diffusion process?
- A.
The relative concentration of the substance in different areas determines the direction of diffusion
- B.
Diffusion happens when the solute has a low water concentration
- C.
Diffusion occurs while you are sleeping
- D.
Diffusion occurs from regions of high concentration to regions of low concentration
- 6.what happens when the Na+ -k+ pump is phosphorylated, when k+ binds to the pump protein
- A.
Phosphorylation of the Na+ -K+ pump causes the pump protein to denature therefore it closes the pump and allows energy to be recycled
- B.
Cholesterol is taken in by receptor-mediated endocytosis
- C.
Diffusion of ions, mainly the diffusion of K+ from the cell through leakage channels, establishes the resting membrane potential
- D.
Phosphorylation of the Na+ -k+ pump causes the pump protein to change shape so that it "pumps" Na+ across the membrane. K+ binding to the pump protein triggers the release of phosphate and the pump protein returns to its original shape
- 7.what process establishes the resting membrane potential?
- A.
Cholesterol is taken in by receptor-mediated endocytosis
- B.
Diffusion of ions, maily the diffusion of K+ from the cell through leakage channels, establishes the resting membrane potential
- C.
The plasma membrane expands as a result of exocytosis
- D.
Phagocity cells engulfing debris
- 8.which vascular transport process allows a cell to take in cholesterol from the extracellular fluid?
- A.
Liglands
- B.
The plasma membrane expands as a result of exocytosis
- C.
Cholesterol is taken in by receptor-mediated endycytosis
- D.
The nucleoli
- 9.as a cell grows, it's plasma membrane expands. does this membrane expansion involve endocytosis or exocytosis?
- 10.is the inside of teh plasma membrane negative or positive relative to its outside in a polarized membrane?
- 11.phagocytic cells gather in the lungs, particularly in the lungs of smokers. what is the connection?
- 12.what term is used to indicate signaling chemicals the bind to membrane receptors?which type of membrane receptor is more important in directing intracellular events by promoting formation of second messengers?
- A.
Liglands
- B.
R protien
- C.
G protien
- D.
Metabolism
- 13.which organelle is the major site of ATP synthesis?
- 14.what are three organells involved in protein synthesis?
- A.
Rough er
- B.
Bibosome
- C.
Gogli aparatus
- D.
All of the above
- E.
Only two of these, one is missing
- 15.how are microtubules and microfilaments related functionally?
- A.
They maintain cell shape
- B.
They are involved in organelle movements with in the cell and/or movements of the cell as a whole
- C.
They increase the cells surface area for absorption
- D.
They both vacation in Hawaii annually
- 16.of microfilaments, microtubles, or intermediate filaments, which is most important in maintaining cell shape?
- A.
Microtubles
- B.
Microfilaments
- C.
Intermediate filaments
- D.
None of them are more important than the other two.
- 17.if a cell ejects or looses it's nucleus, what is its fate and why?
- A.
It free floats through the body
- B.
It is doomed to die
- C.
It will be unable to make proteins
- D.
It will remain inactive until a protein picks it up and moves it to the right location
- 18.what is the role of the nuceoli?
- A.
They provide the means to pack DNA in a compact orderly way
- B.
Regulation and balance
- C.
Nuceoli are the site of synthesis of ribosomal subunits
- D.
Growth
- 19.what are the events occuring in prophase that are undone in telophase?
- A.
Nucleoli disappear
- B.
Spindle forms
- C.
Coil forms
- D.
Nuclear envelop breaks up
- 20.durring what phase of the cell cycle is DNA synthasized?
- A.
S Phase
- B.
G Phase
- C.
G2 Phase
- D.
S2 Phase
- 21.if one of the DNA strands being replicated "reads" CGAATG, what will be the base sequence of the corresponding DNA strand?
- A.
TTACGG
- B.
AATGCG
- C.
GCTTAC
- D.
None of these
- 22.what is the importance of the histone proteins present in the nucleus
- A.
They give coded instructions for protein synthesis
- B.
They make an entry site for TRNA at the ribosmoe
- C.
Provide the means to pack DNA in a compact orderly way
- D.
Play a role in gene regulation
- 23.what is the role of DNA in transcription?
- A.
It attatches to misfolded, damaged or unneeded proteins tagging them for destruction
- B.
DNA provides the coded instructions (is the template) for protein synthesis. Via the mRNA synthesized on it
- C.
It tranesports nutrients, gasses, horomones and other substances through out the body
- D.
It is a process of programed cell death
- 24.what are two body fluids that inhabit the extracellular space?
- A.
Blood plasma
- B.
Intersigital fluid
- C.
Ubiquiting
- D.
Apoptosis
- 25.what is the importance of ubiquitin in the life of a cell?
- A.
It is a process of programed cell death
- B.
It includes structures and functions common to all cells
- C.
It attaches to miss-folded damaged, or unneeded proteins, tagging them for destruction by proteasomes.
- D.
It provides the coded instructions (is the template) for protein synthesis
Questions: 10 | Attempts: 53624 | Last updated: Sep 30, 2021
-
Sample QuestionWhich part of the cell has the genetic material and is often called the "brain of the cell?"
Questions: 11 | Attempts: 22509 | Last updated: Jun 4, 2020
-
Sample QuestionWhat is the jelly like substance found inside a cell?
Questions: 12 | Attempts: 21766 | Last updated: Oct 19, 2020
-
Sample QuestionWhich type of cell has a nucleus?
Back to top