Answer:
Phospholipids, arranged in a bilayer, make up the basic fabric of the plasma membrane.
Explanation:
Answer:
Hey there, I'm not an expert but I think I can help you out!
Explanation:
Following the rule of "like dissolves like", the hydrophilic head of the phospholipid molecule dissolves readily in water. The long fatty acid chains of a phospholipid are nonpolar, and thus avoid water because of their insolubility. In water, phospholipids spontaneously form a double layer called a lipid bilayer, in which the hydrophobic tails of phospholipid molecules are sandwiched between two layers of hydrophilic heads (see figure below). In this way, only the heads of the molecules are exposed to the water, while the hydrophobic tails interact only with each other.Can anybody help me pls.
Question is focus on the big idea
Velocity is...
The change of an objects mass
The change of an object's position
The change of an object's position over a period of time
The change of an object's speed
Answer: is C or D I think
the speed of something in a given direction.
"the velocities of the emitted particles"
Explanation:
Hope this helps!
What is the role of NAD+ and NADP during photosynthesis and resperation
Answer:
NAD+ is an oxidizing agent used as a coenzyme in catabolic reactions in the cell including cellular respiration. NAD is the reduced form of NAD+. In comparison, NADP+ is another coenzyme which serves as an oxidizing agent in anabolic reactions including photosynthesis.
Explanation:
Answer:pigment
Explanation:
1. You are interested in studying the Na+/K+ pump so you inserted the pump into red blood cell
ghosts (essentially cells with no proteins in their membrane). Describe where in the pumping
cycle the Na+/K+ pump would stop and any movement of Na+ and K+ ions (i.e., into or out of
the RBC ghosts) under the following conditions:
A) Your cells were suspended in a solution that contained both Na+ and K+ ions that was in
equilibrium with the intracellular fluid.
B) You added ATP to the solutions on both sides of the cells described in part A.
C) The intracellular and extracellular solutions contain Na+ and ATP but not K+.
D) You perform the experiment shown in B, but you also embed K+ leak channel into your
ghosts.
It is possible to derive a membrane voltage equation that works both in the steady state and dynamically and takes the electrogenicity of the Na/K pump into consideration. A model for the osmotic stabilization of cells includes this equation. The outcomes highlight how the membrane voltage and the pump work together to reduce internal pressure. [tex]Cl^{-}[/tex] concentration, creating osmotic space for essential molecules that must be kept in the cell's confines.
What are the fundamental problems?Controlling the volume of cells with thin membranes is a basic issue. A cell needs to concentrate the components necessary for its survival, such as DNA, proteins, amino acids, and carbohydrates, within of itself. The plasma membrane is only about as powerful as a soap bubble, in contrast to the pressure that is easily created by the osmolarity differential between within and outside, which can easily approach an atmosphere or more. In plant and bacterial cells, a robust cell wall that encircles the plasma membrane prevents swelling.
Animal cells don't have cell walls and have developed a different method of preventing the tendency to expand. They lessen their internal ionic content to create osmotic space for the compounds that are internally sequestered, lowering the gap in osmolarity between inside and outside to zero.
Over many years it became clear that the osmotic stabilization of a living animal cell was related to active transport [tex]Na^{+}[/tex] from and [tex]K^{+}[/tex] into the cell (2-5). The first mathematical model based on this general idea was the lucid-pump leak model of Tosteson and Hoffman, so named because the [tex]Na^{+}[/tex]/[tex]K^{+}[/tex] pump contracts the tendency of [tex]Na^{+}[/tex] to leak into and [tex]K^{+}[/tex] out of a cell. Their volume control in high- and low-K red blood cells was successfully accounted for by their model, which made the cell's steady state assumption.
This model was expanded into the dynamic case by Tosteson (6) and a subsequent model by Jakobsson. Lev et al. have developed a model that takes into account a variety of ion transport processes, such as ion exchange, but it ignores the role of the Na/K pump in osmotic stability.
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How do molecules like O2, CO2, and small hydrophobic molecules cross cell membranes?
Answer: Simple Diffusion Across the Cell (Plasma) Membrane
Explanation:
pretty much the structure of the lipid bilayer allows small, uncharged substances such as oxygen and carbon dioxide, and hydrophobic molecules such as lipids, to pass through the cell membrane, down their concentration gradient, by simple diffusion.
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Please help me solve the pundit square with the info provided
1) Mother's alleles: IA and i. 2) Father's alleles: IA and IB. 3) Genotype: 1/4 IAIA, 1/4 IAi, 1/4 IAIB, 1/4 IBi. Genotypic ratio 1:1:1:1. 4) Phenotype: 1/2 blood type A, 1/4 blood type AB, 1/4 blood type B. Phenotypic ratio 2:1:1
What is the ABO blood type?
Blood type ABO is determined by a triallelic gene I. Depending on the allelic interaction, this gene can express complete dominance or co-dominance. Let us see,
Alleles
IAIBi→ IA and IB are codominant, meaning that when they are together in the same genotype, both of them are expressed.
→ IA and IB express complete dominance over i, meaning that the dominant IA and IB alelles hide the expression of the recessive allele i in heterozygous individuals.
Genotypes Phenotype
IAIA, IAi ⇒ Blood type A
IBIB, IBi ⇒ Blood type B
IAIB ⇒ Blood type AB
ii ⇒ Blood type 0
Now, let us analyze this cross,
Mother: IAiFather: IAIBCross) Mother with blood type A and father with blood type AB
Parentals) IAi x IAIB
Gametes) IA i IA IB
Punnett square) IA i
IA IAIA IAi
IB IAIB IBi
F1) Gentoype
1/4 = 25% of the progeny is expected to be homozygous IAIA
1/4 = 25% of the progeny is expected to be heterozygous IAi
1/4 = 25% of the progenyis expected to be heterozygous IAIB
1/4 = 25% of the progeny is expected to be heterozygous IBi
Genotypic ratio 1:1:1:1 ⇒ 1/4 IAIA : 1/4 IAi : 1/4 IAIB : 1/4 IBi
Phenotype
1/2 = 50% of the progeny is expected to express blood type A (IAIA + IAi)
1/4 = 25% of the progeny is expected to express blood type B (IBi)
1/4 = 25% of the progeby is expected to express blood type AB (IAIB)
Phenotypic ratio 2:1:1 ⇒ 1/2 type A : 1/4 type AB : 1/4 type B
1) Mother's alleles: IA and i
2) Father's alleles: IA and IB
3) F1 Genotypic ratio 1:1:1:1 ⇒ 1/4 IAIA : 1/4 IAi : 1/4 IAIB : 1/4 IBi
4) F1 phenotypic ratio 2:1:1 ⇒ 1/2 type A : 1/4 type AB : 1/4 type B
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Which hypothesis is NOT testable?
Plastic should be recyclable.
Plastic has a low boiling point.
Plastic has a high melting point.
Plastic does not break down in the environment.
Answer: Plastic has a high melting point
Explanation:
Two species of animal share a common ancestor, but one species developed thick fur and the other developed a very light coat of hair. Over
time, the temperature in their native environment grew much warmer and wetter, far too hot for the thick-furred population. Statistically, what
is the most likely outcome for the thick-furred species?
OA
extinction
OB. genetics
OC. mutation
OD. evolution
Reset
Next
Answer: The answer is A extinction
Explanation:
just got finished with the test
Where is Earth's older, denser, and thicker crust located on the seafloor?
A. the furthest away from the center of mid-ocean ridges
B. near the center of mid-ocean ridges
C. near continents
D. the bottom of ocean trenches
The Earth's older, denser, and thicker crust located on the seafloor is the the furthest away from the center of mid-ocean ridges and is denoted as option A.
What is Earth crust?
This is referred to as the outermost layer of the terrestrial planet and consists of young and old ones depending on their location from the mid-ocean ridges.
The Earth's older, denser, and thicker crust located on the seafloor is the the furthest away from the center of mid-ocean ridges and is located around subduction zones and continental shelves while the young and less dense crust are closer which is therefore the reason why option A was chosen as the correct choice.
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Determine the stimulus, receptor, control center response, and effector for gas exchange in plants
PLEASE HELP ME ITS URGENTTTTTTTT
Answer:
The exchange of oxygen and carbon dioxide in the leaf (as well as the loss of water vapor in transpiration) occurs through pores called stomata (singular = stoma). Normally stomata open when the light strikes the leaf in the morning and close during the night.
Stomata (the receptors of gas exchange process) are tiny holes found in the underside of leaves. They control water loss and gas exchange by opening and closing. They allow water vapour and oxygen out of the leaf and carbon dioxide into the leaf. In low light the guard cells lose water and become flaccid, causing the stomata to close.
Stomata, which are microscopic pores on leaves and stems that act as receptors in gas exchange, are common in plants.
Stimulation, which is caused by things like light and the environment, demands gas exchange. The plant's internal regulatory system, the control center, initiates the opening or closing of the stomata. The effectors, the guard cells, regulate the size of stomatal pores to facilitate this response. When under stress, the stomata close to prevent water loss and open to allow the entry of carbon dioxide for photosynthesis. By absorbing carbon dioxide and releasing oxygen during photosynthesis, this exchange enables plants to maintain a stable water balance by controlling transpiration.
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Runoff is most like which of the following? a) a puff of steam b) a flowing stream c) a cloud in the sky d) an invisible form of water
Answer:
a flowing stream
Explanation:
10
When considering the gaps between the evolution of humans and our nearest animal "cousins," Including other primates, what is the most
sensible way to measure the years?
O A. billions
OB. millions
OC. thousands
OD. hundreds
Reset
Next
Millions are the most sensible way to measure the year when considering the gaps between the evolution of humans from our nearest animal cousins primates (Option B).
What is human evolution?Human evolution refers to the lineage by which humans (Homo sapiens species) evolved form the primate branch in the tree of life, which ocuredd million years ago from the Homo erectus species in Africa.
In conclusion, millions are the most sensible way to measure the year when considering the gaps between the evolution of humans from our nearest animal cousins primates (Option B).
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3. List two common everyday examples of the water cycle.
Answer:
Rain and snow soak into the earth and drain into rivers and streams, and fill our reservoirs. Water on the ground also evaporates, turning back into water vapor, to rise in the air and form more clouds. Here's another one: Boiling(evaporation) and ice(freezing)
Explanation:
Emma hits a baseball into the air. While the ball is flying through the air, which of the following objects is pulling on it with a gravitational force?
A. the Sun
B. the bat
C. the Earth
D. all of these
Answer: D All of these
Explanation: For Study Island
Which of the following best describes the function of the enzyme Catalase?
Question 2 options:
Catalase is a poison produced by cells that is broken down by hydrogen peroxide
Catalase is a protein that is used by cells to slow down poisonous chemical reactions.
Catalase breaks down poisonous hydrogen peroxide into water and oxygen gas.
Catalase puts together water and oxygen gas to make poisonous hydrogen peroxide.
The statement that best describes the function of the enzyme Catalase is as follows: Catalase breaks down poisonous hydrogen peroxide into water and oxygen gas (option C).
What is an enzyme?An enzyme is a globular protein that catalyses a biological chemical reaction. A catalytic enzyme is a specific kind of enzyme that breaks down substrates into products.
Catalase is an example of a catalytic enzyme found in the liver that catalyses the decomposition of hydrogen peroxide to water and oxygen.
Therefore, according to this question, the statement that best describes the function of the enzyme Catalase is as follows: Catalase breaks down poisonous hydrogen peroxide into water and oxygen gas.
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In the following explanation, which two body systems are working together to help maintain balanced blood sugar levels?
When sugar levels in your bloodstream drop, your pancreas releases a hormone called glucagon. This makes your liver break down the glycogen into glucose which can then make its way into your cells where it can be used for cellular respiration.
Question 3 options:
Circulatory and Integumentary Systems
Muscular and Skeletal Systems
Endocrine and Circulatory Systems
Skin and Respiratory Systems
The two body systems are working together to help maintain balanced blood sugar levels are endocrine and circulatory systems and is denoted as option C.
What is Endocrine system?This type of system comprises of organs which are referred to as glands and secrete hormones which are required for metabolic reactions in the body system.
The pancreas is an organ which secretes the hormone known as insulin which is responsible in the regulation of sugar level in the blood. The insulin produced is then distributed to target areas through the circulatory system which is why option C was chosen.
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Need help with this. Think it’s false.
Answer: it is false
Explanation:
you got this
The creation of polymers from monomers is known as
Responses
hydrolysis
hydrolysis
ionic bonding
ionic bonding
condensation (dehydration synthesis)
condensation (dehydration synthesis)
hydrogen bonding
(c) Condensation or dehydration synthesis is the process of producing polymers from monomers.
The majority of macromolecules are created by fusing together tiny molecules known as monomers. These are the single-unit molecules that unite to form polymers; the term literally means "single unit" (because "mono" implies "one"). Polymers are simply chains of monomers, to put it simply. Given that meaning of "poly" is "many," this makes logical.
Both monomers and polymers have the ability to combine to form larger structures known as polymers. Our bodies experience particular reactions as a result of this.
While the process of hydrolysis divides polymers into monomers, dehydration processes are those that join monomers together to produce polymers.
The correct option is (c) condensation( dehydration synthesis).
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The complete question is mentioned below:
The creation of polymers from monomers is known as
(a) hydrolysis
(b) ionic bonding
(c) condensation (dehydration synthesis)
(d) hydrogen bonding
are slime molds autotrophic or heterotrophic?
Answer:
heterotrophs
Explanation:
Like plants, slime molds have cellulose in the cell walls of their spores. Unlike plants, slime molds are heterotrophs!
Why has the farm industry replanted trees around rainforest remnants?
a. Because farmers are at one with their plants b. To protect edges from wind exposure and provide a barrier against animals C. To encourage the trees in the rainforest remnants to grow d. To make the edge look prettier
Answer:
b
Explanation:
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_______ fixes atmospheric nitrogen in plants
Answer: Nitrogen
Explanation:
three properties of water and for each property, identify and define the property and explain it in terms of the physical/chemical nature of water?
Physical water characteristics include the temperature, color, flavors, and odor of the water sample. Water's chemical properties include parameters such as pH and dissolved oxygen.
What are physical and chemical properties?When a substance undergoes a chemical change, its chemical properties can be observed or measured. Physical properties are those that can be observed without causing a chemical reaction.
Water's physical properties, namely color, temperature, turbidity, taste, and odor, are related to its appearance.
Even though water molecules are polar, they can establish hydrogen bonds. Water has distinctive properties as a result, such as a relatively high boiling point, a high specific heat, cohesion, adhesion, and density.
Thus, these are some of the properties of water.
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So im currently doing a project that makes up 40% of my grade, Prediction: Which of these variables do you think will have the greatest effect on the alien population? Explain.
. A: Light B: Water or C: Temp
The variable which will have the greatest effect on the alien population is temperature and is denoted as option C.
What is Temperature?This is referred to as the degree of hotness or coldness of a substance and it is influenced by thermal energy. It is measured with the use of a thermometer and the S.I unit is Kelvin.
All the planets have their unique range of temperature and example is earth who has greenhouse gases responsible in heating up the earth surface. This temperature difference will affect the survival of alien population as the effects of water hasn't been ascertained yet by scientists.
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Large area of land characterized by the plant and animal communities that live there
OBiosphere
OBiome
OEcolystem
OPopulation
Can the surface-area-to-volume ration be indicative of the importance of a cell's dimensions and the ability to properly diffuse material into the cell?
If you have an experiment where you are testing whether or not plants grow more with miracle grow, what is the dependent variable?
1. type of plants
2. miracle grow
3. amount of growth
4. water, sunlight, nutrients
Why do oxygen (O2) molecules move into the cell and carbon dioxide (CO2) molecules move out of the cell on the ciliated side ?
What amount of fertilizer in the soil produces the tallest flower
The independent variable is the amount of fertilizer, the dependent variable is the height of the flower, and the controlled variable might be the level of water.
What is the independent variable?The independent variable is those variable that doesn't change in the experiment, the dependent variable is modified by the independent variable and the controlled variable is the same for all treatments.
In conclusion, the independent variable is the amount of fertilizer, the dependent variable is the height of the flower, and the controlled variable might be the level of water.
Complete question:
Find the independent variable, dependent variable, and controlled variable in the experiment: What amount of fertilizer in the soil produces the tallest flower.
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When a cell is placed in a hypertonic solution, the cell may shrink. If the cell decreases in size, its ability to eliminate wastes by diffusion would
A. decrease because the solution would prevent materials from leaving the cell
B. decrease because the cell would now have less waste needing to be disposed of
C. increase because the surface-area-to-volume ratio of the cell would increase
D. increase because water and wastes would be drawn out of the cell into the solution
When a cell is placed in a hypertonic solution, the cell may shrink. If the cell decreases in size, its ability to eliminate wastes by diffusion would increase because the surface-area-to-volume ratio of the cell would increase.
What is meant by the hypertonic solution?The solution which contains more amount of solute than the solution is called a hypertonic solution. If the solution contains less amount of solute then the surrounding is called a hypotonic solution.
If the solution contains the same amount of solute then the surrounding it is called an isotonic solution.
If the cell is placed in hypertonic solution then cell will shrink because solutes and water tend to flow along their gradients. Surface area to volume ratio of the determine the size of the cell. When a cell grows in size its volume is higher than the surface area.
Therefore, When a cell is placed in a hypertonic solution, the cell may shrink. If the cell decreases in size, its ability to eliminate wastes by diffusion would increase because the surface-area-to-volume ratio of the cell would increase.
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Urgently!! I have test tomorrow!! I Need To Know!!
Which organelle generates energy for the cell (Powerhouse)?
Answer:
Mitochondria is the powerhouse of the cell
Explanation:
Mitochondria are known as the “powerhouse of the cell.” The organelle that is responsible for the production of energy in a cell is the mitochondria. This is the most vital part of the cell as it takes the food and makes energy for the other parts of the cell.
Mitochondria play host to one of the most important processes in your body, called cellular respiration. Taking in glucose and oxygen, mitochondria produce energy, which they capture and package as energy-rich molecules of ATP.
I hope its helpful•••
Answer:
Mitochondrion
Explanation:
Mitochondrion generates ATP which is necessary for our body as it uses this energy to perform bodily functions.
Hope it helps!