Which of the following best describes the quaternary structure of a protein? O A protein with two polypeptide chais has two subunits The four parts of a protein's amino acid sequence two of these are correct three of these are correct A protein with a quaternary structure has multiple subunits A protein with a quaternary structure has multiple polypeptide chains The polypeptide chain's of a protein with a quaternary structure are glue together by covalent bonds
Answers
The correct answer is: A protein with a quaternary structure has multiple subunits.
The quaternary structure of a protein refers to the arrangement and interaction of multiple subunits in a protein molecule. These subunits can be identical or different polypeptide chains. The individual polypeptide chains in a protein with quaternary structure are held together by various types of non-covalent interactions such as hydrogen bonds, ionic bonds, and hydrophobic interactions, rather than covalent bonds. Therefore, the correct statement is that a protein with a quaternary structure has multiple subunits.
The best description of the quaternary structure of a protein is: A protein with a quaternary structure has multiple subunits and multiple polypeptide chains. The quaternary structure refers to the arrangement of these subunits and polypeptide chains in a multi-subunit complex.
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Related Questions
allows oxidation of co (carbon monoxide) to less-harmful co₂ (carbon dioxide) allows oxidation of hc (unburned hydrocarbons) to co₂ (carbon dioxide) and h₂o (water)
Answers
The oxidation of co (carbon monoxide) to less-harmful co₂ (carbon dioxide) and the oxidation of hc (unburned hydrocarbons) to co₂ (carbon dioxide) and h₂o (water).
What is oxidation?
One or more electrons are lost during the chemical reaction of oxidation, which takes place inside of an atom or molecule.
TWO-WAY CATALYTIC CONVERTERS
enables the conversion of carbon monoxide (CO) to the less hazardous gas CO2 (carbon dioxide)enables the conversion of unburned hydrocarbons (HC) to CO2 and H2O (water)This structure allows the chemical reaction to happen by directing exhaust fumes to travel through the substrate that is made of the precious metals platinum and palladium. As the conversion process proceeds, the temperature of the exhaust gases rises.
This process generates a great deal of heat, hence the exhaust gases that exit the converter should be hotter than the gases that enter it. This also explains why most units need to have heat shields.
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Metal cations in solution are complexed to H2O molecules and exist as hydrated ions. For example, Ni2+ complexes to form the hydrated ion Ni(H2O)62+. Metal cations are also able to complex to other ligands, such as NH3. An aqueous solution is prepared in which 0. 00153 mol Ni(NO3)2 and 0. 353 mol NH3 are dissolved in a total volume of 1. 00 L. Kf for Ni(NH3)62+ is equal to 5. 5 × 108.
Part 2) Write the expression for the dissociation constant needed to determine the concentration of Ni(H2O)62+ ions at equilibrium in the solution formed in Part 1.
Kd = [Ni(NH3)3 + ][no] [NH] 6
This is what I put for part 2, but it is not right.
Part 3) Calculate the concentration of Ni(H2O)62+ ions at equilibrium in the solution formed
Answers
The concentration of Ni(H2O)62+ ions at equilibrium in the solution formed is 0.00153 M.
The expression for the dissociation constant to determine the concentration of Ni(H2O)62+ ions at equilibrium in the solution formed in Part 1 is: Kd = [Ni(H2O)62+] / ([Ni(H2O)62+] + [Ni(NH3)62+])
In this equation, [Ni(H2O)62+] represents the concentration of hydrated nickel(II) ions, and [Ni(NH3)62+] represents the concentration of complexed nickel(II) ions with ammonia ligands.
To calculate the concentration of Ni(H2O)62+ ions at equilibrium in the solution, we need to consider the stoichiometry of the reaction and the values given.
From the stoichiometry of the equation, we know that 1 mole of Ni(NO3)2 yields 1 mole of Ni(H2O)62+ ions. Given that there are 0.00153 mol of Ni(NO3)2, the concentration of Ni(H2O)62+ ions is also 0.00153 M.
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Which organism is part of Kingdom Fungi? ciliates lichen paramecium slime molds
Answers
Answer:
Slime.
Once upon a time, slime was part of the fungi kingdom. Now it's not, according to experts.
Hope this helps!
If we weighed a cup of water and a spoonful of pepper separately and then stirred the pepper into the water and weighed the mixture, how do you think the weights would compare? Why? What if we did the same with sugar?
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Answer:
it would be the same weight but it's ith sugar I think it would way more
an equimolar mixture of two optical isomers is called a
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An equimolar mixture of two optical isomers is called a racemic mixture or a racemate.
Both enantiomers or optical isomers, are equally present in a racemic mixture. Enantiomers are molecules that share the same connectivity and chemical formula but differ in how they are arranged in three dimensions, creating mirror-image structures. The polarised light plane can rotate in opposing orientations for each enantiomer.
However, when they are combined in equal amounts, their optical rotations cancel one another out, resulting in a racemic mixture that is net optically inactive. Racemic mixes, which differ from their individual enantiomers in a variety of ways, are frequently seen in chemical and biological systems.
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3. A group of inner planets are also known as------- *
A. gas giants
B. outer planets
C. the hollow planets
D. the terrestrial planets
Answers
Answer:D
Explanation:
The Terrestrial Planets. From top: Mercury, Venus, Earth and Mars. The planets Mercury, Venus, Earth, and Mars, are called terrestrial because they have a compact, rocky surface like Earth's terra firma. The terrestrial planets are the four innermost planets in the solar system.
A bond in which valence electrons are shared is called covalent. is the process of breaking large molecules into smaller ones by adding water. If energy is released when a molecule is broken apart, it is a(n) reaction. The process of building up large molecules from small components is a(n) process. A lipid with four sites lacking hydrogen saturation is a lipid.
Answers
Answer:
A bond in which valence electrons are shared is called COVALENT.
HYDROLYSIS is the process of breaking large molecules into smaller ones by adding water.
If energy is released when a molecule is broken apart, it is an EXERGONIC REACTION.
The process of building up large molecules from small components is an ANABOLIC process.
A lipid with four sites lacking hydrogen saturation is a POLYUNSATURATED lipid.
a a reaction orrcurs in a calorimeter that contains 2300g of water at 30c. the reaction releases 9.66 *10^3 j of heat. if the specific heat capacity of water is 4.184 j*g*c what is the final temperature of the water
Answers
The final temperature of the water is 33.02°C.
Here's the solution:
Initial temperature of water (T1) = 30°C
Mass of water (m) = 2300g
Specific heat capacity of water (c) = 4.184 J/g°C
Heat released by the reaction (q) = 9.66 * 10^3 J
Final temperature of water (T2) = (T1 + q/mc)
= (30°C + 9.66 * 10^3 J / 2300g * 4.184 J/g°C)
= 33.02°C
The heat released by the reaction is absorbed by the water, causing the temperature of the water to increase.
The final temperature of the water is calculated by adding the heat released by the reaction to the initial temperature of the water and dividing by the mass of the water and the specific heat capacity of water.
Thus, the final temperature of the water is 33.02°C.
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How does pH affect cation exchange and mineral retention in the soil?
Answers
pH plays a crucial role in cation exchange and mineral retention in soil. Low pH (acidic conditions) increases the release of cations from soil particles, while high pH (alkaline conditions) promotes cation retention and reduces their availability for plants.
The pH of soil affects cation exchange and mineral retention through its influence on the soil's electrical charge and the solubility of minerals. In acidic conditions (low pH), the soil becomes positively charged, which leads to the release of cations from soil particles.
The high concentration of hydrogen ions (H+) displaces cations from the exchange sites on clay particles, allowing them to be leached away or become more available for plant uptake. This increased cation release can result in nutrient deficiencies for plants.
Conversely, in alkaline conditions (high pH), the soil becomes negatively charged. This facilitates the retention of cations on soil particles, reducing their availability for plant uptake.
The elevated concentration of hydroxide ions (OH-) can compete with cations for binding sites on clay minerals and organic matter, effectively immobilizing the cations and decreasing their mobility in the soil.
Therefore, maintaining an optimal pH range for specific crops is essential for promoting cation exchange and mineral availability in the soil. pH management through soil amendments and fertilization practices can help create favorable conditions for nutrient uptake and plant growth.
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During aerobic respiration, electrons travel downhill in which sequence?
a) food → citric acid cycle → ATP → NAD+
b) food → NADH → electron transport chain → oxygen
c) glucose → pyruvate → ATP → oxygen
d) glucose → ATP → electron transport chain → NADH
e) food → glycolysis → citric acid cycle → NADH → ATP
Answers
The correct sequence during aerobic respiration in which electrons travel downhill is (b) food → NADH → electron transport chain → oxygen.
Aerobic respiration is a process by which cells convert food molecules into usable energy in the presence of oxygen. During this process, electrons are passed from one molecule to another, creating a flow of energy that is ultimately used to produce ATP, the main energy currency of the cell. When food is broken down in the first step of respiration, it is converted into a molecule called NADH. This molecule then donates electrons to the electron transport chain, which is a series of proteins located in the inner mitochondrial membrane. As the electrons pass through the chain, energy is released and used to create a proton gradient. This gradient is then used by an enzyme called ATP synthase to produce ATP. Finally, the electrons are passed to oxygen, which serves as the final electron acceptor and is ultimately reduced to water.
In summary, during aerobic respiration, electrons travel from food to NADH to the electron transport chain to oxygen. This process creates a flow of energy that is used to produce ATP and ultimately enables cells to carry out their functions.
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When an acid and base are mixed together, they neutralize each other by reacting to form ________ and ________.
Answers
Answer:
water and a salt
Explanation:
I need help with the first question, if you can help with the other two I would really appreciate it!
Answers
Answer:
5
Explanation:
What does w represent
Answers
Answer:
It is used to represent whole numbers
Explanation:
Discuss Dalton’s ideas by completing the following paragraph. After years of studying _____, Dalton was able to accurately determine the ______ of the elements involved in the reactions. His conclusions resulted in the ____________, which helped to explain that ________ in chemical reactions separate, ________ or ___________, but are not created, ___________, or _________.
Answers
1.Chemical reactions
2. Mass ratios
3. Atomic theory
4. Atoms
5. Combine
6. rearrange
7. Destroyed
8. Divided
What is the atomic theory?The atomic theory is a scientific description of the nature of atoms and matter.
The Dalton's atomic theory was the first complete attempt to describe all matter in terms of atoms and their properties.
After years of studying Chemical reactions, Dalton was able to accurately determine the mass ratios of the elements involved in the reactions. His conclusions resulted in the atomic theory, which helped to explain that atoms in chemical reactions separate, combine or rearrange, but are not created, destroyed, or divided.
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Which of the following is an example of an element? a brass b oxygen c rust d water
Answers
Answer:
A) Oxygen
Explanation:
An element is defined as something made of only 1 type of atom. Brass and rust are made up of many types of atoms, and water has two types of atoms, hydrogen and oxygen. Oxygen is made up of two oxygen atoms, which are the same element. So, by definition, oxygen is an element.
Answer:A
Explanation:
Can someone check my work to see if I did it right
Answers
Answer:
Your answer is correct and perfect.
PLEASE MARK ME BRAINLIEST.What happens over time as sediments settle on land or water?
Answers
Deposition: Sediments can accumulate and settle on the bottom of a water body or on land, resulting in the formation of layers of sediment. This process can take thousands or even millions of years, and the resulting sedimentary layers can provide important information about the history of the area.
Compaction: As sediment accumulates, it can become compacted due to the weight of the layers above it. This can result in the compression of the sediment, causing it to become denser and harder over time.
Cementation: Sediments can also become cemented together over time, as minerals in the sediment dissolve and precipitate out, filling the spaces between the grains of sediment and binding them together. This process can result in the formation of sedimentary rocks.
Erosion: Sediments can be eroded away by the action of wind or water, or by human activities such as mining or construction. This can result in the loss of soil and changes to the landscape.
Overall, the process of sedimentation can have a significant impact on the environment over time, as sediments accumulate and are transformed into new forms.
What is true of synthesis and decomposition reactions?
O Synthesis reactions require more energy than decomposition reactions.
Synthesis reactions produce more products than decomposition reactions.
Synthesis reactions are the opposite of decomposition reactions.
Synthesis reactions have fewer reactants than decomposition reactions.
Answers
Answer:
Synthesis reactions are the opposite of decomposition reactions.
Explanation:
Synthesis reactions require more energy than decomposition reactions. The correct option is A.
What is decomposition reaction?A decomposition reaction occurs when a compound is broken down into two or more simpler substances.
A decomposition reaction has the general form: AB--->A+B. The majority of decomposition reactions require an energy input in the form of heat, light, or electricity.
When two or more reactants combine to form a single product, this is referred to as a synthesis reaction.
The general equation for this type of reaction is A + B --> AB. The reaction of sodium (Na) and chlorine (Cl) to produce sodium chloride is an example of a synthesis reaction (NaCl).
Synthesis reactions require energy to bond reactants together, whereas decomposition reactions break the bonds within a reactant and thus release energy.
Thus, the correct option is A.
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Which model illustrates a compound A, b, c, d,
Answers
Answer: C
Explanation: I have the same question, it’s for summit, my teacher helped me with this question :)
Uranium-232 has a half-life of 68.8 years. After 344.0 years, how much uranium-232 will remain from a 375.0-g sample?
Answers
Uranium-232 will remain 11.72 g
Further explanationThe atomic nucleus can experience decay into 2 particles or more due to the instability of its atomic nucleus.
Usually radioactive elements have an unstable atomic nucleus.
The main particles are emitted by radioactive elements so that they generally decay are alpha (α), beta (β) and gamma (γ) particles
General formulas used in decay:
\(\large{\boxed{\bold{N_t=N_0(\dfrac{1}{2})^{T/t\frac{1}{2} }}}\)
T = duration of decay
t 1/2 = half-life
N₀ = the number of initial radioactive atoms
Nt = the number of radioactive atoms left after decaying during T time
t 1/2 = half-life = 68.8 years
T = duration of decay = 344 years
No= initial sample = 375 g
Uranium-232 remain :
\(\tt Nt=375.\dfrac{1}{2}^{344/68.8}\\\\Nt=375.\dfrac{1}{2}^5\\\\Nt=11.72~g\)
are useful in science because they provide a way
to investigate things that are too small, large, complex, or distant
to observe or investigate directly.
Answers
Answer:
Models
Explanation:
I NEED HELP ASAP
Destructive process
Describe Weathering By this process: Gravity
Describe Weathering By this process: Glaciers
Describe Weathering By this process: Wind
Describe Weathering By this process: Water
—
Constructive process
Deposition features formed as a result: Gravity
Deposition features formed as a result: Glaciers
Deposition features formed as a result: Wind
Deposition features formed as a result: Water
PLS HELP ME
IF U DO ILL DOUBLE UR POINTS
Answers
Answer:
this is the process that lowers or tears down the surface features of the earth.
gravity moves broken pieces of rock,large or small down slope.
glaciers move all sizes of sediments from extremely large Boulder to the tiniest fragments.
wind moves sand sized and smaller pieces through the air.
water moves all sizes of sediments.
given 2PbS + 3O2 = 2PbO + 2SO2 A) determine the theoretical yield of PbO is 50g of O2 is used? B) what is the %yield if 170.0g PbO is obtained
Answers
A. The theoretical yield of PbO is 232.08 grams.
B. The percent yield of PbO is 73.26%.
A. Determine the theoretical yield of PbO if 50g of O2 is used:
We first need to determine the molar mass of O2, which is 32 g/mol (16 g/mol per oxygen atom).
Next, we can set up a stoichiometric ratio using the balanced equation:
2 moles of PbS react with 3 moles of O2 to produce 2 moles of PbO.
Using the molar ratio, we can calculate the moles of O2 used:
moles of O2 = (mass of O2 used) / (molar mass of O2)
moles of O2 = 50 g / 32 g/mol = 1.5625 mol
From the stoichiometry, we know that 2 moles of PbO are produced for every 3 moles of O2.
Therefore, the moles of PbO produced can be calculated as follows:
moles of PbO = (moles of O2) × (2 moles of PbO / 3 moles of O2)
moles of PbO = 1.5625 mol × (2/3) = 1.0417 mol
Finally, we can calculate the theoretical yield of PbO using its molar mass:
theoretical yield of PbO = (moles of PbO) × (molar mass of PbO)
theoretical yield of PbO = 1.0417 mol × 223.2 g/mol = 232.08 g
Therefore, the theoretical yield of PbO is 232.08 grams.
B) Calculate the percent yield if 170.0 g of PbO is obtained:
The percent yield is calculated by dividing the actual yield by the theoretical yield, then multiplying by 100%:
percent yield = (actual yield / theoretical yield) × 100%
percent yield = (170.0 g / 232.08 g) × 100% = 73.26%
Therefore, the percent yield of PbO is 73.26%.
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What change was caused by a change in temperature?
Answers
Answer:
The temperature of the earth determines how much water there is in our atmosphere. Carbon dioxide is the most commonly discussed of the greenhouse gases. This has occurred primarily because of the huge amounts of carbon dioxide humans are moving from the earth to the atmosphere in the burning of fossil fuels.Explanation:
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emergency help ASAP Help me fill out the box please help I’ll mark you as brainlister
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Answer:
based on the table, element Q participate in ionic bonding because both potassium and sodium transfers its electrons to element Q, forming ions that attract each other.
478 cal of heat is applied to a glass plate with a mass of 90 g. by how much will the temperature of the plate increasee?
Answers
478 cal of heat is applied to a glass plate with a mass of 90 g, and the temperature of the plate increases will be 26.6 g⁻¹.°C⁻¹
The amount of heat applied = 478 cal
The specific heat capacity of glass = 0.2 cal g⁻¹.°C⁻¹
Mass of glass = 90 g
Temperature increased ΔT = ?
We will calculate the change in temperature by using the following equation
Q = mcΔT
Rearrange the equation for ΔT
ΔT = Q / mc
ΔT = 478 cal / 90 * 0.2 cal g⁻¹.°C⁻¹
ΔT = 478 cal / 18 g⁻¹.°C⁻¹
ΔT = 26.6 g⁻¹.°C⁻¹
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give 10 examples of potential energy converted into kinetic energy
Answers
Answer:
Book on Table
Car at the Hilltop
Falling Objects
Skydiver
Hammering a Nail
Dam Water
Roller Coaster
Stretched Rubber Band
Simple Pendulum
Compressed Spring
Battery
Flashlight
Exothermic Chemical Reaction
Burning of Oil, Gas and Coal
Wind Turbine
Explanation:
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pls i already asked for help with this but im honestly just so lost and my parents dont understand. i really need this done and ive been trying to understand it and figure it out but i cant
Answers
Answer: 3 ,2, 6
Explanation:
3 Cu(NO3)2 + 2 K3PO4 → Cu3(PO4)2 + 6 KNO3
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a balloon contains 2.5 L of air at 1.00 atm. it is taken underwater to a new pressure of 4.00 atm. what id the new volume? round to 2 decimal places
Answers
using boyles law (2.5L)(1atm)=(xL)(4atm)
If a book has a weight of 23.2 N on Earth, what is its mass?
Answers
Answer: Mass is 2,37 kg
Explanation: Weight G = mg, and g = 9.81 m/s² on Earth.
m = W/g = 23.2 N / 9.81 m/s²