1. Which of the following pairings are/is correct?
Cholesterol: has a hydrophilic and hydrophobic end
Cholesterol: does not have a hydrophilic end since it is a lipid
Cholesterol: is often times wedged in between the phospholipids
1st and 2nd choices only
1st and 3rd choices only
2nd and 3rd choices only
All of the above
None of the above
2. Which of the following pairing/s is/are correct?
Cholesterol: helps maintain the integrity of the cell membrane
Cholesterol: the rigid four carbon rings prevent lipid tails from packing too closely
Cholesterol: the rigid four carbon rings also prevent the membrane from being too fluid
1st and 2nd choices only
1st and 3rd choices only
2nd and 3rd choices only
All of the above
None of the above
3. Which of the following pairing/s is/are correct?
Membrane proteins: help maintain concentration gradients
Concentration gradient: the difference of amounts of solutes on two sides of a solution
Solutes: are the substances dissolved in a solution
1st and 2nd choices only
1st and 3rd choices only
2nd and 3rd choices only
All of the above
None of the above
4. Which of the following pairing/s is/are correct?
Molecules: move around randomly on their own
Molecules: when concentrated create an unstable environment due to increased collisions of molecules
Diffusion: is the movement of molecules from a region of low concentration to a region of high concentration
1st and 2nd choices only
1st and 3rd choices only
2nd and 3rd choices only
All of the above
None of the above
5. Which of the following pairing/s is/are correct?
Passive movement: movement of molecules that is energetically favorable b/c free energy is released in the process
Passive movement: requires energy from outside of the system
Passive movement: occurs as molecules move up their concentration gradients
1st and 2nd choices only
1st and 3rd choices only
2nd and 3rd choices only
All of the above
None of the above
6. Which of the following pairings/s is/are correct?
Active movement: is a passive process
Active movement: is an energetically unfavorable process
Active movement: releases free energy
1st and 2nd choices only
1st and 3rd choices only
2nd and 3rd choices only
All of the above
None of the above
7. Which of the following pairing/s is/are correct?
Transport channels: allow movement of all ions through
Transport carriers: allow movement of all ions through
Channels : passive movement
Carriers: active movement
1st and 2nd choices only
1st and 3rd choices only
1st, 2nd, and 3rd choices only
2nd and 3rd choices only
All of the above
None of the above
8. Which of the following paring/s is/are correct?
Active transporters: movement of molecules up their concentration gradients
Active transporters: require energy
Active transporters: ATP dependent pumps, antiporters, symporters
1st and 2nd choices only
1st and 3rd choices only
2nd and 3rd choices only
All of the above
None of the above
1. Which of the following pairings are/is correct?
Cholesterol: has a hydrophilic and hydrophobic end
Cholesterol: does not have a hydrophilic end since it is a lipid
Cholesterol: is often times wedged in between the phospholipids
1st and 2nd choices only
1st and 3rd choices only
2nd and 3rd choices only
All of the above
None of the above
2. Which of the following pairing/s is/are correct?
Cholesterol: helps maintain the integrity of the cell membrane
Cholesterol: the rigid four carbon rings prevent lipid tails from packing too closely
Cholesterol: the rigid four carbon rings also prevent the membrane from being too fluid
1st and 2nd choices only
1st and 3rd choices only
2nd and 3rd choices only
All of the above
None of the above
3. Which of the following pairing/s is/are correct?
Membrane proteins: help maintain concentration gradients
Concentration gradient: the difference of amounts of solutes on two sides of a solution
Solutes: are the substances dissolved in a solution
1st and 2nd choices only
1st and 3rd choices only
2nd and 3rd choices only
All of the above
None of the above
4. Which of the following pairing/s is/are correct?
Molecules: move around randomly on their own
Molecules: when concentrated create an unstable environment due to increased collisions of molecules
Diffusion: is the movement of molecules from a region of low concentration to a region of high concentration
1st and 2nd choices only
1st and 3rd choices only
2nd and 3rd choices only
All of the above
None of the above
5. Which of the following pairing/s is/are correct?
Passive movement: movement of molecules that is energetically favorable b/c free energy is released in the process
Passive movement: requires energy from outside of the system
Passive movement: occurs as molecules move up their concentration gradients
1st and 2nd choices only
1st and 3rd choices only
2nd and 3rd choices only
All of the above
None of the above
6. Which of the following pairings/s is/are correct?
Active movement: is a passive process
Active movement: is an energetically unfavorable process
Active movement: releases free energy
1st and 2nd choices only
1st and 3rd choices only
2nd and 3rd choices only
All of the above
None of the above
7. Which of the following pairing/s is/are correct?
Transport channels: allow movement of all ions through
Transport carriers: allow movement of all ions through
Channels : passive movement
Carriers: active movement
1st and 2nd choices only
1st and 3rd choices only
1st, 2nd, and 3rd choices only
2nd and 3rd choices only
All of the above
None of the above
8. Which of the following paring/s is/are correct?
Active transporters: movement of molecules up their concentration gradients
Active transporters: require energy
Active transporters: ATP dependent pumps, antiporters, symporters
1st and 2nd choices only
1st and 3rd choices only
2nd and 3rd choices only
All of the above
None of the above
Related textbook solutions
Related questions
Some of the questions have more than one correct answers
1- Select all of the following that are correct regarding lipidrafts.
A- They include higher concentrations of sphingolipids than thesurrounding membrane | |
B- They include higher concentrations of phosphatidylcholinethan the surrounding membrane | |
C- They include higher concentrations of cholesterol than thesurrounding membrane | |
D- They include higher concentrations of GPI-anchored proteinsthan the surrounding membrane | |
E- They localize components of pathways |
2- Select all of the following that are in the membrane bilayerasymmetrically (i.e. different composition in two leaflets of amembrane).
A-Carbohydrates | |
B- Proteins | |
C- Lipids | |
D- Nucleic acids |
3-Select all of the following that are true of activetransport.
A- Some solutes are moved against their concentration gradients,from one side of a membrane to the other, using energy from ATPhydrolysis. | |
B- Light-driven pumps can couple the movement of solutes againsttheir concentration gradient to an energy input from light. | |
C- moving from higher concentration to lower concentration |
4- Which organelle is the major site of new membrane synthesisin a cell?
A- A mitochondrion | |
B- The endoplasmic reticulum | |
C- The Golgi apparatus | |
D- The nucleus | |
E- None of the above |
5-Select all of the following protein types that are on BOTHvesicles and target membranes and must interact (directly orindirectly) for fusion to occur.
A- COPI | |
B- COPII | |
C-COPIII | |
D- Rabs | |
E-SNAREs | |
F-Clathrin |
Cellular biology answer check. please check if my answers arecorrect or not.
1) The concentration of ions inside a cell is the same as theirconcentration outside of the cell. True or false? (i chose falsesince having equilibrium inside a cell is bad)
2) Membrane transport proteins...
| a)...transport membrane potentials between cells |
| b) | ...transport membranes from the ER to the Golgi |
| c) | ...are made up of phospholipids |
| d) | ...transport molecules across membranes |
i chose d
3)The electrochemical gradienttakes into account:
| a) | The concentration of solutes on either side of themembrane. |
| b) | The overall charge on either side of the membrane. |
| c) | Both of these. |
i chose C. (although i am sure that overall charge matters, Iwasn't sure if concentration of solutes are taken account.)
4) If no energywere expended by an animal cell:
| a) | Both gradients would be depleted |
| b)The K+ gradient would maintain itself. |
| c) | None of these |
| d) | The Na+ gradient would maintain itself. |
I chose d) mainly because I think Na+ gradient exist in animalcell and not K+ gradient.
5) Which of the following is a true statement aboutactin?
| a) | Once actin has polymerized, it never depolymerizes. |
| b) | Actin is a transmembrane protein. |
| c) | Actin can form branched networks. |
| d) | Actin filaments are organized into hollow tubes. |
I chose c. can't explain why.
6)Ion channels:
| a) | Form a hydrophobic channel through the membrane |
| b) | Have filters that let sugars through |
| c) | Are selective for particular ions (only the |
