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In the plasma membrane of erythrocytes the concentration ofphosphatidylserine on the extracellular side of the membrane is2.32 microM while on the cytosolic side its 615.56 microM. Thetransmembrane potential is -70 mM (extracellular --> cytosolic)and the free energy change associated with this transversediffusion is 21.14 kj/mol.

(C) ( 2 pts) Name the protein that transports phosphatidylserinefrom the extracellular side of the membrane to the cytosolicside.________________________________-

(D) ( 2 pts) How does this protein make this transportexergonic?

(E) ( 2pts) This is an example of what type oftransport?___________________________________

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Collen Von
Collen VonLv2
28 Sep 2019
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Related questions

1) In the major biosynthetic pathway, what is the order in which mRNA moves through the various organelles?

2) Compare and contrast the structure and function of the smooth endoplasmic reticulum and the rough endoplasmic reticulum?

3) Is SAR1 COPI or COPII? What type of protein is this? What causes SAR1 to active and what protein is necessary for this to occur?
4) Dynamin binds where clathrin meets the plasma membrane. As dynamin binds, it forms a ring that is then pinched so that the vesicle can be released from the plasma membrane. What allows for this to occur?

5) What are three different mechanisms of protein translocation? Briefly describe the state of the proteins when translocated in each of these ways.

6) What is the KDEL sequence stand for and how does it function within the cell? What type of transport is it associated with?

7) In what cellular compartment would a glycoprotein be expected to have its greatest mannose content? Its greatest N-acetylglucosamine content? Its greatest sialic acid content?

8) Would you expect the properties of the cisternal side of Golgi membranes to be more similar to the extracellular or cytosolic side of the plasma membrane? Why?

9) ________ are the site of cellular digestion, in which digestion occurs with the help of 50 __________. _____ digest proteins and ____ digest lipids.

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1. The plasma membrane of liver cells contains a glucose uniportthat transports glucose by facilitated diffusion. When the[glucose] is higher inside the liver cell than the [glucose]outside the liver cell, the glucose uniport will

A. couple the transport of glucose out of the cell to thehydrolysis of ATP

B. couple the transport of glucose into the cell to thehydrolysis of ATP

C. switch to a closed conformation, allowing no transport ofglucose

D. transport glucose out of the cell by passive transport

E. transport glucose in of the cell by passive transport

2. Unlike the positive charged ion shown in the middle diagramof figure 11-4B, K+ is higher in concentration inside the cell. Howwill the membrane potential of a cell at rest (shown in both themiddle and right-hand diagrams of Figure 11-4B) affect theelectrochemical gradient for K+?

A. The membrane potential will increase the electrochemicalgradient

B. The membrane potential will decrease the electrochemicalgradient

C. The membrane potential will have no effect on theelectrochemical gradient

3. Which of the following proteins carries out activetransport?

A. gluclose symport

B. Bacteriorhodopsin

C. ABC transporter

D. NA K pump

E. All of the above

4. Aquaporin will not transport Na+ ions because

A. Two asparagine residues in the channel prevent the passage ofNa+ ions by binding the oxygen of each water molecule as it passesby

B. Na+ ions are repelled by the positive charges at the entranceto the channel

C. Na+ ions cannot make contact with the carbonyl (C=O) groupson all four sides of the channel

D. The passage of Na+ ions is energetically unfavorable becauseone side of the channel is hydrophobic in nature

5. The acetylcholine receptor is different from other channelproteins we have discussed, such as the K+ leak channel,because

A. The acetylcholine channel is composed of a single polypeptiderather than multiple subunits

B. The acetylcholine channel transports Na+ ions against theconcentration gradient for sodium

C. The acetylcholine channel has a much smaller diameter thanother channel proteins

D. The acetylcholine channel transports ions with theirassociated shell of water molecules

E. The acetylcholine channel is always open, and never switchesto a closed conformation

6. After opening briefly along the axon of a neuron,voltage-gated ion channels switch to an inactivated conformationthat slowly returns to the original closed conformation of theprotein. This slow change in conformation, requiring about amillisecond, is important because

A. all of the ions that were transported across the membranewhen the ion channels were open must be actively transported backto the other side of the membrane, restoring the originalconcentration gradient, before the ion channels can open again

B. ATP hydrolysis is necessary to drive this energeticallyunfavorable change in conformation

C. it prevents the action potential from reversing direction andtraveling back toward the cell body of the neuron

D. the channel protein must be dephosphorylated in order tocomplete the transport process and return to the originalnonphosphorylated conformation

i need help with this homwork please choose the correct answers and just be claer to read and understand for the slect the apply qusestions too and it is important i realy need the right answers so please be claer not write randomly i really need the correct answers to study for my test so hop you can help me

Question 1

What is the smallest cell you could find?

Mycoplasma
Archaea
Bacteria
Cyanobacteria

Question 2

TEMs appear as 3D images

True
False

Question 3

Bacteria are what cell type? Write one word as the answer in lowercase and using no syntax.

Flag this Question

Question 42 pts

ALL eukaryotic cells have which of the following. Click all that apply.

nucleoid
cell membrane
chloroplasts
nucleus
membrane enclosed cell organelles
mitochondria

Question 5

Prokaryotes and eukaryotes both have which if the following cellular components. Click all that apply.

ribosomes
plasma membrane
DNA
nucleoid

Question 6

I am made of one 60s and one 40s subunit, which organelle am I?

protein
lipid

bacterial ribosome

Question 9

The difference between the rough and smooth ER is

the rough produces lipids where as the smooth does not
the rough has many folds and convolutions where as the smooth does not
the rough has ribosome embedded and the smooth does not
the rough is closer to the cell membrane whereas the smooth is closer to the nucleus

Question 10

The site where many lipids, including cell membrane is produced.

rough ER
nucleus
smooth ER
lysosomes

Question 11

Name the organelle: In muscle cells in particular, I would increase in number and size in response to frequent exercise

mitochondria
nuclei
ribosomes
nucleoid

Question 12

In animal cells, glucose would be mobilized from its storage molecule (glycogen) in this part of the cell.

rough ER
mitochondrion
nucleus
smooth ER

Question 13

Which of these is associated with the rough ER

production of carbohydrates
production of steroid hormones
production of ATP
production of proteins that are secreted from the cell

Question 14

Which organelle sorts, modifies and stores substances produced on the rough ER. Write two words as the answer in lower case separated by a space.

Question 15

Which organelle is responsible for ATP production. Write one word in the singular as the answer.

Question 16

You inherit all of your mitochondria from your

father
half from your mother and half from your father
your siblings

mother

Question 17

An organelle that contains chlorophyll

chlorosomes
chlorochondria
chloroplasts
chlorophytes

Question 18

Microtubules have a variety of roles, which of the options below is NOT one of them?

separate chromosomes
cilia and flagellum movement
tracks for organelle movement
constrict the cell during cell division

Question 19

Made of tubulin subunits

microfilaments
chromosomes
intermediate filaments
microtubules

Question 20

Name the part of the cytoskeleton that is made of two twisted rods of actin. Write one word as the answer in lower case.

Question 21

Which part of the cytoskeleton is made of the same protein as your hair and nails?

microfilaments
microtubules
Intermediate filaments

Question 22

The extracellular matrix is found outside of, but attached to the cell membrane?

True
False

Question 23

Which of the options below is an important function of the extra cellular matrix?

connecting cells together
regulate the movement of substances into and out of the cell
helping cells divide into two cells
keeping the cell in a fixed and ridged shape

Question 24

Which part of the cell wall has a high pectin content?

secondary cell wall
extracellular matrix
primary cell wall
middle lamella

Question 25

Plants have mitochondria, chloroplasts, a cell wall, and nuclei.

True

False

Question 27

What accounts for 40% of the protein in our bodies?

Fibers
Cells
Collagen
Keratin

Question 28

Animal cells have cell walls

True
false

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