The original fluid mosaic model stated that membrane proteins move freely in the plane of the lipid bilayer via lateral diffusion "like protein icebergs in a sea of lipids." Since its initial description in 1927, the fluid mosaic model has been refined.
Complete the statements that describe some of the refinements of the fluid mosaic model as it relates to protein mobility.
Choose the answer that best completes each sentence:
Membrane (lipid) rafts, Vesicles, Cytoskeletal elements, Protein-protein interactions, Bilayer leaflets.
1) ______ may form a locally rigid, non-lipid matrix surrounded by the fluid lipid matrix.
2) ______, membrane domains rich in sphingolipids and cholesterol, are regions with reduced lipid and protein mobility.
3) ______ can be attached to proteins or can "fence in" proteins, reducing protein mobility.
Answers
Answer:
1. Protein-protein interactions
2. Lipid rafts
3. Cytoskeletal elements
Explanation:
The fluid mosaic model was proposed by the Singer and Nicolson in 1972 which stated that the membrane is a mosaic of the lipids, carbohydrates and the proteins.
The fluid mosaic model has been revised many times which are:
1. Protein-protein interactions: the proteins present in the lipid bilayer can easily float in the lipid layer, can be found integrated into the layer and exist on the outside of the layer. These proteins can form a bond with each other which are rigid and are non-lipid matrix.
2. Lipid rafts: the structure formed in the bilayer which is rich in cholesterol and the sphingolipids. These regions have a reduced amount of lipids and reduced protein mobility.
3. Cytoskeletal elements: are attached to the proteins and act as a fence in proteins which reduces the mobility of the proteins.
Related Questions
The Sun has been shining on this swimming pool all day. The water is much warmer than it was in the morning. Describe what is happening to the water in terms of temperature, particle speed, and kinetic energy.
Answers
Answer:
The waters' temp increased
Explanation:
The temperature of the water in the swimming pool has increased due to the heat from the Sun. As a result, the particles in the water are moving faster and have a higher kinetic energy than in the morning.
The atomic mass of helium-4 is 4.0026 amu. How many of each
particle (protons, electrons, neutrons) is present in an atom of
helium-4?
Answers
Answer:
Protons: 2.
Electrons: 2.
Neutrons: 2.
Explanation:
Hello,
In this case, since an atom's atomic number is equal to the number of electrons, considering the electron configurations, taking into account that helium-4 is neither positively nor negatively charged, we can infer that the number of electrons equal the number of protons, which in this case are 2, due to the fact that is atomic number is 2.
Moreover, as helium-4's atomic number is 4 as a whole number, we compute the number of neutrons by using the shown below equation:
\(Neutrons=mass\ number-atomic\ number\\\\Neutrons=4-2\\\\Neutrons=2\)
Regards.
what mass of glucose c6h12o6 would be required to prepare 5000 mL of a 0.215 M solution
Answers
Approximately 194.0 grams of glucose (C6H12O6) would be required to prepare a 5000 mL solution with a concentration of 0.215 M.
To determine the mass of glucose (C6H12O6) required to prepare a 0.215 M solution in 5000 mL, we need to use the formula:
Molarity (M) = moles of solute / volume of solution (in liters)
First, let's convert the volume of the solution from milliliters (mL) to liters (L):
5000 mL = 5000/1000 = 5 L
Now, we can rearrange the formula to solve for moles of solute:
moles of solute = Molarity (M) x volume of solution (L)
moles of solute = 0.215 M x 5 Lmoles of solute = 1.075 mol
Since glucose (C6H12O6) has a molar mass of approximately 180.16 g/mol, we can calculate the mass of glucose using the equation:
mass of solute = moles of solute x molar mass of solute
mass of glucose = 1.075 mol x 180.16 g/mol
mass of glucose = 194.0 g (rounded to three significant figures)
Therefore, approximately 194.0 grams of glucose (C6H12O6) would be required to prepare a 5000 mL solution with a concentration of 0.215 M. It's important to note that the molar mass of glucose used in this calculation may vary slightly depending on the level of precision required.
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How might the puppy’s new environment affect its growth and development?
Answers
Answer:
New environments for puppies may make them excited, fearful, aggressive, or confused.
Explanation:
"When your dog first experiences a new location or environment, there's no way of knowing how they'll react. New sights, sounds, and smells could make them fearful, aggressive, or over-excited, but with the proper training and introduction, most dogs will quickly adapt and start taking every new location in stride." - Excerpt from *Puppy training textbook*
New environments are also a good thing in puppy growth, to teach them how to learn and adapt to new surroundings.
Hope this helps :)
Carbon monoxide (CO) and hydrogen (H2) are fed to a continuous catalytic reactor operating at steady state. There are no other components in the feed. The outlet stream contains unconverted CO and H2, along with the products methanol (CH30H), ethanol (C2HsOH), isopropanol (C3H70H), and carbon dioxide (C02). These are the only species in the product stream.
The reactions occuring are:
CO+ 2H2 → CH3OH
3CO+ 3H2 → C2H5OH+ CO2
5CO+ 4H2 → C3H7OH + 2CO2
The feed rates of CO and H2 to the reactor are 100 mol/h(each). the rates in the stream that leaves the reactor (in mols/h) are H2-30; CO-30; C2H5OH-5. What’s the mole fraction of each species in the product steam?
Answers
Answer:
Explanation:
Let the products in the outlet streams be P(i.e. CH₃OH), Q(i.e. C₂H₅OH) and R(i.e. C₃H₇OH) respectively
Then the mass balance for CO, H and C₂H₅OH can be computed as follows:
For CO, The mass balance is;
100 - P - 3Q - 5R = 30 --- (1)
For H₂, The mass balance is;
100 - 2P - 3Q - 4R = 30 --- (2)
For C₂H₅OH, The mass balance is;
Q = 5 --- (3)
Replacing the value of equation(3) into equation (1) and (2); we have:
From equation (1):
100 - P - 3(5) - 5R = 30 --- (1)
100 - 15 - P - 5R = 30
85 - P - 5R = 30
85 - 30 = P + 5R
P + 5R = 55 ----- (4)
From equation (2):
100 - 2P - 3Q - 4R = 30 --- (2)
100 - 2P - 3(5) - 4R = 30
100 - 15 - 30 = 2P +4R
55 = 2P + 4R
2P + 4R = 55 ----- (5)
From equation (4) and (5); we have:
P + 5R = 55 ----- (4)
2P + 4R = 55 ----- (5)
From equation (4);
Let P = 55 - 5R
Then, replace P = 55 - 5R in equation (5)
2(55 - 5R) + 4R = 55
110 - 10R + 4R = 55
110 - 6R = 55
6R = 110 - 55
6R = 55
R = 55/6
R = 9.17
Substitute, the value of R in equation (5); we have:
2P + 4R = 55
2P + 4(9.17) = 55
2P = 55 - 4(9.17)
2P = 55 - 36.68
2P = 18.32
P = 18.32/2
P = 9.16
Therefore, the outlet stream rates are as follows:
Mass Feed Rate ( mol/hr) Molar ratio
CO 30 0.281
H₂ 30 0.281
CH₃OH 9.16 0.085
C₂H₅OH 5 0.047
C₃H₇OH 9.17 0.086
CO₂ 23.34 0.219
Total: 106.67
Cumulative Exam Active
41 42 43 144
The electron configuration of nitrogen (N) is
O 1s²2s²2p³
O 1s²2s²2p4
O 1s²2s²2p5
O 1s²2s²2p6
Answers
The answer is: The electronic configuration of Nitrogen is \(1s^22s^22p^3\).
Electronic configuration: The electronic configuration is defined as the distribution of electrons of an atom in the atomic or molecular orbitals and is written using the labels for the subshell.
How to decide which orbital is filled first?
The order in which electrons are filled in atomic orbitals as:(Shown in image)
Just follow the arrows to select the orbitals, s orbital can have 2 electrons, p can have 6 electrons, d can have 10 electrons and f can 14 electrons.The electronic configuration in which the outer shell is completely filled is known as noble-gas configuration as they are similar to electronic configurations of noble gases.Now, the given element is nitrogen (\(N\)). The atomic number of Nitrogen is 7. Thus, these 7 electrons are filled as-\(1s^22s^22p^3\)
Therefore, the electronic configuration of Nitrogen is \(1s^22s^22p^3\).To learn more about the electronic configuration, visit:
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Nitrogen's complete electron configuration is 12s2s22p3.
The shorthand electron configuration for noble gases is [He] 2s22p3. Nitrogen has an atomic number of 7. The nitrogen atoms' nucleus contain this many protons. An atom that is neutral has an equal number of protons and electrons. Thus, the ground state electron configuration will consist of 7 electrons in the suitable s and p orbitals (state of lowest energy). For nitrogen, the entire electron configuration is 1s22s22p. Scientists may easily express and explain how the electrons are organized around the nitrogen atom's nucleus by using the configuration notation for nitrogen (N). As a result, it is simpler to comprehend and forecast how atoms will cooperate to form chemical bonds.
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PLEASE HELP WILL MARK BRAINLEST!!!
Answers
Answer:
C. i don't kow
Explanation:
Explain the three types of thermal energy transfer and give an example of each type.
Answers
Answer:
Conduction is the transfer of energy from one molecule to the next by direct contact.
Convection is the movement of heat by a fluid such as air or water.
Radiation is the transfer of heat by electromagnetic waves.
Explanation:
Convection is known as the process of transferring energy or heat through a fluid (liquids or gasses) from high temperatures to low temperatures. Convection is known as one of the three types of heat energy transfer. The other two types of heat energy transfer are conduction and radiation. Conduction is known as the transfer of heat between anatomies that are directly touching each other. while, during radiation, the energy is discharged in the shape of electromagnetic waves.
As for the molecular motion in liquids, it is the result of convective heat energy transfer. Furthermore, the movement of the molecules increases as the temperature of the molecules is increasing. The result of this is that the molecules seem to move away from each other. The motion of the molecules is what is responsible for the transfer of heat.
identify the kind(s) of intermolecular forces that would occur between the solute and solvent in an isopropyl alcohol (which is polar and contains an oh o h group) solution.
Answers
Isopropyl alcohol (C3H8O) is a polar molecule due to the presence of an OH group. The types of intermolecular forces that would occur between the solute (isopropyl alcohol) and the solvent depend on the nature of the solvent. In general, polar solutes dissolve in polar solvents, and the intermolecular forces that occur are:
Hydrogen bonding: Isopropyl alcohol can form hydrogen bonds with other polar molecules, including water or other alcohols. Hydrogen bonds occur between the hydrogen atom of the OH group in isopropyl alcohol and the lone pair of electrons on the oxygen atom of the other molecule.
Dipole-dipole interactions: Isopropyl alcohol can also experience dipole-dipole interactions with other polar molecules. Dipole-dipole interactions occur when the positive end of one polar molecule is attracted to the negative end of another polar molecule due to their partial charges.
In summary, the intermolecular forces that would occur between isopropyl alcohol and a polar solvent, such as water or another alcohol, are hydrogen bonding and dipole-dipole interactions.
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HELP help HELP!!!! Me ME me
Answers
How does a limiting reagent affect how much product is formed?
O A. The amount of product will be limited by the molar mass of the
limiting reagent
B. The amount of product will be limited by the sum of the reactant
coefficients.
C. The amount of product will be limited by the number of moles of
the limiting reagent.
D. The amount of product will be limited by leftover amounts of other
reactants.
Answers
Answer:
C. The amount of product will be limited by the number of moles of
the limiting reagent.
Explanation:
a p e x :)) i just took the quiz
The amount of product will be limited by the number of moles of
the limiting reagent. Hence, option C is correct.
What is a Limiting reagent?The reactant that gets consumed early in the reaction restricts the quantity of product which will be produced in the chemical reaction. Thus, the reactant that gets consumed early in a chemical reaction is a limiting reagent.
Hence, the amount of product will be limited by the number of moles of the limiting reagent.
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Given that equilibrium in the acid-base reaction below lies to the left, which acid is the weaker of the two acids involved in the reaction?
HC₂O₄⁻(aq) + NH₄⁺(aq) ⇄ NH₃(aq) + H₂C₂O₄(aq)
A.) H₂C₂O₄
B.) HC₂O₄⁻
C.) NH₃
D.) NH₄⁺
Answers
The weaker acid involved in the given reaction is HC₂O₄⁻. Option B is correct.
The position of equilibrium in an acid-base reaction can provide information about the relative strength of the acids and bases involved. In the given reaction, if the equilibrium lies to the left, it indicates that the forward reaction is not favored and the reverse reaction is favored.
This means that the products NH₃(aq) and H₂C₂O₄(aq) have a tendency to react and form the reactants HC₂O₄⁻(aq) and NH₄⁺(aq).
Therefore, the acid dissociation constant of HC₂O₄⁻(aq) is K_a1 = 5.9 × 10⁻². The acid dissociation constant of H₂C₂O₄(aq) is K_a2
= 5.9 × 10⁻⁵.
Since the equilibrium lies to the left, it means that the concentration of HC₂O₄⁻(aq) is higher than that of H₂C₂O₄(aq) at equilibrium. This suggests that HC₂O₄⁻(aq) is the weaker acid, as it does not dissociate as much as H₂C₂O₄(aq) does.
Hence, Option B is correct.
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HELP PLEASE
Why doesn't the Earth's shadow fall on the Moon during the Full Moon phase?
The Moon's orbit isn't flat, it's tilted
The Earth is much larger than the Moon
The Moon is much smaller than Earth.
The Moon's orbit is flat and isn't tilted
Answers
The plane of the Moon's orbit around the Earth is tilted by 5° with respect to the plane of the Earth's orbit around the Sun, the ecliptic. This tilt prevents an eclipse from occurring at every new and full moon. In a lunar eclipse, the observer watches the Earth's shadow fall on the Moon.
Answer:
Because there is no light in space so there is no shadow
The area of the triangular field is 255m2. Find its base if it 9
Answers
Answer:
b = 56.67 m
Explanation:
It is given that,
Area of the triangular field is 255 m²
We need to find the base of the field if its height is 9 m.
The area of a triangle is given by :
\(A=\dfrac{1}{2}\times b\times h\\\\b=\dfrac{2A}{h}\\\\b=\dfrac{2\times 255}{9}\\\\b=56.67\ m\)
So, the base of a triangle is 56.67 m.
Example of change in substance
Answers
The original substance has undergone a transformation into a new substance with different properties, indicating a change in the chemical composition of the material.
An example of a change in substance is the process of combustion. When a substance, such as wood, is burned, it undergoes a chemical reaction with oxygen in the air, which produces a new substance: carbon dioxide gas, water vapor, and ash. This change in the chemical composition of the wood means that it has transformed into a completely new substance with different physical and chemical properties.
Another example is the process of electrolysis, where an electric current is passed through a solution containing ions. This can cause a chemical reaction to occur, resulting in the breakdown of the original substance into its component parts or the formation of a new substance.
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give one difference between group 7 of the modern periodic table and group 7 in Mendeleev's periodic table
Answers
Answer:
One difference between Group 7 of the modern periodic table and Group 7 in Mendeleev's periodic table is the placement of the elements.
In Mendeleev's periodic table, Group 7 consisted of manganese (Mn), technetium (Tc), and rhenium (Re). In the modern periodic table, Group 7 consists of the halogens: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At).
The halogens are a group of highly reactive nonmetals, while the elements in Group 7 of Mendeleev's periodic table were not all nonmetals and did not share the same chemical properties as the halogens.
Hope this helps!
-Convert 6.02 x 1020 formula units of MgCl₂ to mol of MgCl₂:
Answers
6.02 x \(10^{20\) formula units of MgCl₂ is equal to 0.1 moles of MgCl₂.
To convert formula units of MgCl₂ to moles of MgCl₂, we need to use Avogadro's number, which relates the number of formula units to the number of moles.
Avogadro's number (NA) is approximately 6.022 x 10^23 formula units per mole.
Given that we have 6.02 x 10^20 formula units of MgCl₂, we can set up a conversion factor to convert to moles:
(6.02 x 10^20 formula units MgCl₂) * (1 mol MgCl₂ / (6.022 x 10^23 formula units MgCl₂))
The formula units of MgCl₂ cancel out, and we are left with moles of MgCl₂:
(6.02 x 10^20) * (1 mol / 6.022 x 10^23) = 0.1 mol
Therefore, 6.02 x 10^20 formula units of MgCl₂ is equal to 0.1 moles of MgCl₂.
It's important to note that this conversion assumes that each formula unit of MgCl₂ represents one mole of MgCl₂. This is based on the stoichiometry of the compound, where there is one mole of MgCl₂ for every one formula unit.
Additionally, this conversion is valid for any substance, not just MgCl₂, as long as you know the value of Avogadro's number and the number of formula units or particles you have.
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Formaldehyde has a wide range of uses, many of them in manufacturing. Its chemical formula is CH₂O. The model below represents formaldehyde.
Based on the model, which statement best describes formaldehyde molecules?
A. Formaldehyde molecules form an extended structure and cannot freely move past each other.
B. Formaldehyde molecules do not form an extended structure and can freely move past each other.
C. Formaldehyde molecules do not form a repeating pattern and cannot freely move past each other.
D. Formaldehyde molecules form a repeating pattern and can freely move past each other.
Answers
Answer: B
Explanation: Formaldehyde molecules do not form an extended structure and can freely move past each other
Alka was making tea in a kettle. Suddenly she felt intense heat from the puff of steam gushing out of the spout of the kettle. She wondered whether the temperature of the steam was higher than that of the water boiling in the kettle. Comment. (2)
Answers
It is likely that the temperature of the steam is higher than the temperature of the water boiling in the kettle. The intense heat felt by Alka from the puff of steam supports this observation.
In general, the temperature of steam produced from boiling water is higher than the temperature of the water itself. When water boils, it undergoes a phase change from a liquid to a gas, forming steam.
During this phase change, the water absorbs heat energy from the heat source, such as a stove or electric kettle, and converts it into the latent heat of vaporization.
The boiling point of water is 100 degrees Celsius (212 degrees Fahrenheit) at standard atmospheric pressure. At this temperature, the water molecules have enough energy to overcome the intermolecular forces and transition into the gaseous state.
However, steam is hotter than the boiling point of water because it contains additional heat energy in the form of latent heat. The heat energy absorbed during vaporization is stored as latent heat within the steam. As the steam gushes out of the spout of the kettle, it releases this latent heat energy, which can be felt as intense heat.
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Synthetic reactions in Citric Acid Cycle
Answers
★ « Synthetic reactions in Citric Acid Cycle » ★
The overall reaction for the citric acid cycle is as follows: acetyl-CoA + 3 NAD+ + FAD + GDP + P + 2H2O = CoA-SH + 3NADH + FADH2 + 3H+ + GTP + 2CO2. Many molecules in the citric acid cycle serve as key precursors for other molecules needed by cells.hope it is
Describe a process that may have produced the moon
Answers
What volume in milliliters of a 0.111 M NaOH solution is required to reach the equivalence point in the complete titration of a 12.0 mL sample of 0.132 M H2SO4?
Answers
The volume of the base that we are going to require in the process would be 28.5 mL
What is neutralization reaction?A neutralization reaction is a chemical reaction that occurs when an acid reacts with a base to form a salt and water. It is called a neutralization reaction because the resulting solution is neutral, with a pH of around 7.
We have that;
CAVA/CBVB = NA/NB
CAVANB = CBVBNA
VB = CAVANB/CBNA
VB = 0.132 * 12 * 2/0.111 * 1
VB = 28.5 mL
We are going to use the base that would have a volume of 28.5 mL
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How many mL of a 0.75 N KOH solution
should be added to a 500 mL flask to make
500 mL of a 0.300 M KOH solution?
Answers
The amount of volume of KOH solution that should be added to make 500mL of a 0.300M solution is 200mL.
How to calculate volume?The volume of a solution given the concentration can be calculated using the following expression;
CaVa = CbVb
Where;
Ca = initial concentrationVa = initial volumeCb = final concentrationVb = final volumeAccording to this question, we are to calculate how many mL of a 0.75 M OH solution that should be added to a 500 mL flask to make 500 mL of a 0.300 M KOH solution.
0.75 × Va = 500 × 0.3
0.75Va = 150
Va = 150/0.75
Va = 200mL
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The passage's author most vividly conveys the sense that Plumpp's poetry is like music when he
O uses words like "swing," "dance," and "sway" to characterize phrases in Plumpp's poems
O defines Plumpp as "the poet laureate of Chicago jazz and blues"
explains how long Plumpp has been writing about "Chicago jazz giants"
urges people to read Plumpp's poems and listen to the music Plumpp "immortalizes in print"
Answers
It is an amine, and it has less polar nitrogen-hydrogen and oxygen-hydrogen bonds.
A compound's boiling point is a physical characteristic. These intramolecular linkages between the molecules that make up a chemical affect these physical characteristics.
Alcohols and amino acids have the same kind of intermolecular linkages. The hydrogen bond is the name of this kind of bond.
The electrical attraction between a hydrogen atom from one molecule and an electronegative atom from a nearby molecule is known as a hydrogen bond.
The strength of the bond is in the following order: H.....F > H.....O > H......N
The H....N hydrogen bonds exist in amines, whereas the H....O hydrogen bonds exist in alcohols.
Consequently, the alcohol's hydrogen bonds are stronger and it will impart a higher boiling point on the compound.
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Answer:uses world like
Explanation:
CxHy +O2 --> H2O + CO2
Question 1 options:
Decomposition
Combustion
Synthesis
Single Displacement
Look down below at the picture thank you
Answers
Single displacement because the oxygen is not balance
12. 5.6g of solid copper was heated with 476.2 J at room temperature (25°C). Given that
copper has a C of 0.38 J/g°C, what would its final temperature be?
Answers
Answer:
The final temperature of the copper would be 311.3°C.
I hope this helps you
Determine the answer to the following equation with correct number of significant figures: (4.123 × 0.12) + 24.2 =
Answers
The value of the given equation i.e. (4.123 × 0.12) + 24.2 is 24.7.
Given that,
The equation is (4.123 × 0.12) + 24.2.According to the BODMAS rule, first, we have to multiply 4.123 with 0.12 after that add the 24.2 to the value that comes.
So,
= (4.123 × 0.12) + 24.2
= 0.49476 + 24.2
= 24.69
= 24.70
Therefore we can conclude that the value of the given equation i.e. (4.123 × 0.12) + 24.2 is 24.7.
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Perform the following calculations to correct number of aignificant figures: 8.88 ÷ 99.40
Answers
Please give brainliest!
Determine the volume (in mL) of 1.00 M NaOH that must be added to 250 mL of 0.50 M CH3CO₂H to produce a buffer with a pH of 4.50.
Answers
Approximately 70.57 mL of 1.00 M NaOH should be added to 250 mL of 0.50 M CH3CO₂H to produce a buffer with a pH of 4.50.
To determine the volume of 1.00 M NaOH required to produce a buffer with a pH of 4.50 when added to 250 mL of 0.50 M CH3CO₂H, we need to consider the Henderson-Hasselbalch equation and the stoichiometry of the reaction.
The Henderson-Hasselbalch equation for a buffer solution is given as:
pH = pKa + log([A-]/[HA])
In this case, CH3CO₂H (acetic acid) acts as the weak acid (HA) and CH3COO- (acetate ion) acts as its conjugate base (A-). We are given that the desired pH is 4.50, and we can determine the pKa value for acetic acid from reference sources, which is approximately 4.75.
Using the Henderson-Hasselbalch equation, we can rearrange it to solve for the ratio [A-]/[HA]:
[A-]/[HA] = 10^(pH - pKa)
[A-]/[HA] = 10^(4.50 - 4.75) = 10^(-0.25) = 0.5623
This means that the ratio of the acetate ion to acetic acid in the buffer solution should be approximately 0.5623.
To calculate the required volume of NaOH, we need to consider the stoichiometry of the reaction. Acetic acid reacts with hydroxide ions (OH-) to form acetate ions and water:
CH3CO₂H + OH- → CH3COO- + H2O
The stoichiometric ratio between acetic acid and hydroxide ions is 1:1. Therefore, the volume of 1.00 M NaOH needed can be calculated using the equation:
Volume (NaOH) × 1.00 M = Volume (CH3CO₂H) × 0.50 M × 0.5623
Volume (NaOH) = (Volume (CH3CO₂H) × 0.50 M × 0.5623) / 1.00 M
Volume (NaOH) = (250 mL × 0.50 M × 0.5623) / 1.00 M
Volume (NaOH) ≈ 70.57 mL
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How many moles are equal to 145g of zinc nitrate
Answers
Answer:
there are 6 MOLES of zinc nitrate in 145 g