Floyd has just learned about the fluid mosaic model that describes the structure of a cell’s plasma membrane. Which image of an everyday item most closely resembles the model?
-Sandwhich
-metal spring
-swiss roll
-electric wire
*PLEASE HELPP*

Answers

Answer 1

Answer:

The sandwich is the close representation of the fluid mosaic model which explains the structure of the plasma membrane.

Although the sandwich model is not completely correct, in the given options, the most closely related model is the sandwich model. The metal spring, swiss roll, and electric wire don't share many similarities to the fluid mosaic model.

Explanation:

According to the fluid mosaic model, the lipid bilayer membrane has embedded proteins that allow the transportation of molecules inside/outside the cell. The model was proposed by SJ Singer & G. L. Nicolson in 1972. Previously, it was believed that the structure of the cell membrane is closely related to a sandwich in which two protein layers embed the lipid bilayers. This model was proposed by Davson and Danielle.

Answer 2

The correct image that most closely resembles the fluid mosaic model of a cell's plasma membrane is the Swiss roll.

The fluid mosaic model describes the plasma membrane as a bilayer of phospholipids with embedded proteins that float freely in the lipid layer, much like icebergs in a sea of lipids. This model emphasizes the fluid nature of the lipid bilayer and the mosaic-like distribution of proteins.

Here's why the Swiss roll is the best analogy among the options provided:

- Sandwich: This might seem like a good analogy because a sandwich has layers, but it does not capture the fluidity of the membrane or the distribution of proteins.

- Metal spring: While this option might suggest flexibility, it does not represent a bilayer structure or the distribution of proteins.

- Swiss roll: This option is the most accurate because the Swiss roll consists of layers (like the phospholipid bilayer) with a filling that can be thought of as the proteins and other molecules embedded within the membrane. The rolling nature of the Swiss roll also suggests a certain degree of flexibility, which is a characteristic of the fluid mosaic model.

- Electric wire: This does not resemble the fluid mosaic model as it is linear and does not have a bilayer structure.

Therefore, the Swiss roll is the everyday item that most closely resembles the fluid mosaic model of a cell's plasma membrane.


Related Questions

Which statements describe the characteristics of an individual protein? Check all that apply.
It is specific to one biochemical reaction.
It increases the activation energy needed for a reaction.
It can catalyze many different reactions.
It increases the rate of a biochemical reaction.
It slows down the rate of a biochemical reaction.

Answers

It is specific to one biochemical reaction.

It increases the rate of a biochemical reaction.


The characterstics of individual protein are:-

it is specific to one biochemical reactionit increases the rate of a biochemical reactionWhat are proteins?

Proteins are large biomolecules and macromolecules that comprise one or more long chains of amino acids.

What is biochemical reaction?

It is the transformation of one molecule to a different molecule inside a cell.

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How do worms reproduce?
a. only sexually.
b. only asexually.
c. both sexually and asexually.
d. none of the above?

Answers

They reproduce asexually

Worms, depending on the species, can reproduce option c. both sexually and asexually. Annelids, like earthworms, can reproduce in both ways, whereas flatworms generally reproduce sexually.

They fertilize their own eggs after exchanging sperm with another worm during sexual reproduction. They can also reproduce asexually by budding or fission, for example.

Flatworms, on the other hand, typically reproduce sexually. After fertilization, a single flatworm produces both eggs and sperm, and the eggs turn into larvae outside the adult flatworm's body.

Nematodes, like C. elegans, also use a variety of reproductive methods. Depending on the species, these may include dioecious reproduction, monoecious reproduction, self-fertilizing hermaphrodites, or even asexual reproduction through parthenogenesis.

A cell is placed in a water solution with the same salt concentration as the cell. The cell is placed in a _____.

hypotonic solution
hypertonic solution
isotonic solution

Answers

Isotonic solution.
Since it has the same salt concentration as the cell the solution is neither hypotonic or hypertonic.

The answer is isotonic solution.

Which plane shows brain structures as they would be seen from the front?

Answers

The plane that shows brain structures as seen from the front is the frontal or coronal plane. This vertical plane divides the brain into front and back regions. It runs parallel to the eyes or ears.

The vertical plane that shows brain structures as they would be seen from the front is called the frontal or coronal plane. This plane runs parallel to the eyes or ears and divides the brain into front (anterior) and back (posterior) regions. For example, a slice of the brain taken along the coronal plane would look similar to slicing a loaf of bread with the eyes at the front, allowing you to see both the left and right side structures positioned frontally.

Trees do not move like birds do but they are living things. why

Answers

Trees aren't made biologically the same way as birds. For this same reasons this is why humans don't "fly". Yes, we have developed technologies to create an atmosphere forgoing the fact that we don't have wings or 'webbed' limbs to help us fight the force of gravity while in the air. This is why trees cannot fly, because they are born that way biologically for a purpose, to convert carbon dioxide to oxygen.

What do all carbonate minerals have in common?

Answers

they are on the periodic table

The type of line recognized by the brain and eyes but is not actually present.

Answers

Implied line

Hope I helped! ♡

Should commercial fruit farmers be allowed to use ethylene to accelerate the ripening of fruit for the market? Why or Why not?

Answers

The answer is: NO

Accelerated ripening of fruits lowers the quality of the fruits because it circumvents the  natural process of ripening. In some cases of accelerated ripening, one finds a premature fruits looking ripe. In other cases, it causes ununiform ripening and also causes  hastened senescence reducing shelf life.

The commercial fruit farmers should not be allowed to use ethylene.

Though ethylene is a natural growth regulator in the plant, if it is not applied in limited  quantity it produces adverse effects such as overly ripened fruits, yellowing of green fruits and fruit becoming excessive soft and loose to pre maturity. It leads to chlorophyll destruction and also inhibits vegetative tissue. It also inhibits auxin transport, flower development, shoot and root growth.

A specimen is 0.2 mm long. Calculate the length of its image if it magnified by 1000 times.

Answers

200 cause 0.2 times 1000 is 200
magnification is equal to the ratio of image height(H) to the object height(h)
Therefore,

m=H/h

1000=H/0.2

H = 1000 * 0.2

So,
Image height (H) = 200 mm

Which human activity does not affect the Earth system? (1) disposing of toxic wastes (2) converting solar energy (3) clearing land for farming (4)
burning natural gas and coal

Answers

Converting Solar Energy
I think the answer is converting solar energy

The ends of DNA molecules form telomeres that help keep the ends of chromosomes from sticking to each other. Why might this be especially important in germ cells, which go through meiosis and make haploid gametes?

Answers

if the ends of two chromosomes stick together, the chromosomes will not separate correctly during meiosis. one of the resulting gametes will have an extra chromosome, and the other will be missing a chromosome

The telomeres which keep the ends of chromosomes from sticking to each

other is important because it helps to prevent mutation and death  of

offspring.

Telomeres are referred to as the ends of the chromosome. They prevent

sticking together of the homologous chromosomes during the process of

separation in meiosis.

If the telomere is absent and sticking together happens then one of the

resulting gametes will have extra chromosome with a corresponding

deficiency in the chromosome of the other thereby resulting in lower

reproductive rate,  mutation and death

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what is represented by the sequence below?
a. a feedback mechanism in multicellular organisms
b. differentiation of organic molecules
c. the disruption of cellular communication
d. an immune response by cells of the pancreas

thanks! xoxo

Answers

Think it’s a) the feedback system :)

a. a feedback mechanism in multicellular organisms

What is the safest way to carry a microscope? One student should hold onto the base and one student shouldWhat is the safest way to carry a microscope? One student should hold onto the base and one student should grasp the arm. Two students should hold opposite sides of the microscope base. Place one hand under the base and grasp the arm with the other hand. Place both hands securely around the base of the microscope. grasp the arm. Two students should hold opposite sides of the microscope base. Place one hand under the base and grasp the arm with the other hand. Place both hands securely around the base of the microscope.

Answers

place one hand under the base and grasp the arm with the other.


hope I helped ;)

Answer:  Place one hand under the base and grasp the arm with the other hand.

A microscope is a device that is used to magnify and observe small living and non-living entities. These microscopes are expensive instruments  and need to be handle carefully. The correct way to handle a microscope is to place the hand under the base of the microscope, this provides support to the instrument. The other hand should be used to grasp the arm, this provides a hold over the instrument. This is the safest way that assures proper handling and transfer of microscope from one place to another manually.

these group of cells represent different ___

a. organelles that carry out different functions
b. tissues in which similar cells function together
c. organs that help to carry out a specific life activity
d. systems that are responsible for a specific life activity

thanks!! xoxo

Answers

In the image, these groups of cells perform the same function. The correct answer is "tissues in which similar cells function together". For instance, the cells from the bladder lining, collectively, have the ability to transform from stratified to squamous epithelium therefore accommodating the storage of urine. 

Answer:

b. tissues in which similar cells function together

Explanation:

I got it right on my test.

The genetic makeup of a trait is represented by two letters. what do these letters represent?

Answers

The two alleles, one inherited from each parent

Tundra means “treeless land.”
True or False

Answers

True, a vast, flat, treeless Arctic region of Europe, Asia, and North America in which the subsoil is permanently frozen.
Final answer:

The statement that 'Tundra' means 'treeless land' is true. Tundra is a term used to describe the barren landscapes in extreme latitudes of the Earth where trees can't grow due to harsh conditions.

Explanation:

The statement is indeed true. 'Tundra' is a term used in physical geography that really means 'treeless land'. This term is generally used to describe the cold and often barren landscapes found in the extreme northern or southern latitudes of the Earth, where the harsh climate conditions make it difficult for trees to grow. In a tundra biome, most of the vegetation consists of grasses, mosses, and lichens, all of which are better adapted to the cold temperatures and short growing seasons.

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Property Expected from Muscle Fibers..?

Answers

it would be the first one
Final answer:

Muscle fibers are complex multicellular units equipped with several components that enable their functional properties, most importantly muscle contraction. These include the sarcolemma (plasma membrane), sarcoplasm (cytoplasm), sarcomeres (functional unit), and several other structures and proteins. There are also different types of muscle fibers that use different metabolic methods to generate ATP, the energy for muscle contraction.

Explanation:

Skeletal muscle fibers are long, multinucleated cells contained within a plasma membrane, the sarcolemma. The cytoplasm of the cell is referred to as sarcoplasm, which along with the specialized smooth endoplasmic reticulum or sarcoplasmic reticulum plays an important role in the property of muscle contraction through the release and retrieval of calcium ions. The functional unit of a muscle fiber is the sarcomere, an organized arrangement of actin and myosin filaments that, through a series of steps, shorten to produce movement.

The number of sarcomeres and myofibrils within a muscle fiber, which can be influenced by factors such as hormones and stress, can result in hypertrophy, increasing the mass of a muscle, or, if muscle use is decreased, atrophy, wherein the muscle mass decreases. The three types of skeletal muscle fibers, slow oxidative, fast oxidative, and fast glycolytic, each use a different metabolic method to generate ATP, the energy for muscle contraction.

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If aden- means gland, what word could mean a tumor of the sebaceous glands?

Answers

Final answer:

The term for a tumor of the sebaceous glands combining 'aden-' for gland and '-oma' for tumor is 'sebaceous adenoma', which is a benign growth originating from the oil-producing sebaceous glands.

Explanation:

If the term "aden-" refers to a gland and we are discussing a tumor of the sebaceous glands, the medical term for such a tumor would often include the suffix "-oma", which refers to a tumor. Thus, the word that could describe a tumor of the sebaceous glands is "sebaceous adenoma". A sebaceous adenoma is a benign tumor that arises from the sebaceous glands which are responsible for producing sebum.

Sebum is the oily substance that helps to lubricate and protect the skin and hair. While sebaceous adenomas are usually not serious and often do not require treatment, they could potentially indicate an underlying condition if they are multiple or irregular.

Habitat destruction is the leading cause for declining populations of species on our planet. Due to human development, industry, and forestry, humans are destroying the habitat of many species at an alarming rate. Consider the bald eagle. The bald eagle population was threatened in the late 60s and early 70s. Thanks to an aggressive bald eagle protection program, bald eagle numbers in the wild have soared as seen in the population graph above. The bald eagle's population very nearly reached extinction. Why did the bald eagle's declining population make it more vulnerable to extinction? A) As populations decline, reproduction stops B) As populations decline, less resources are available C) As populations decline, there is less genetic diversity D) As populations decline, birds migrate farther away from other populations

Answers

The answer is C) As populations decline, there is less genetic diversity. This is called the 'founder effect'. With limited numbers of individuals in a population, it is more likely that highly-related individuals will mate. This will result in recessive and deleterious genes being manifested in the phenotype. Consider that higher organisms are diploid: they contain two complete sets of chromosomes, one from each parent. Within each chromosome, some alleles will be dominant while others will be recessive, i.e., for the recessive alleles to be manifested in the phenotype, both have to be recessive, whereas for the dominant allele, only one of the alleles has to be dominant for the allele to manifest in the phenotype. With lower genetic diversity, a higher proportion of individuals will have chromosomes containing both recessive alleles, which may manifest as lowered fitness and genetic disorders.   

 C)  As populations decline, there is less genetic diversity

As populations decline, there is less genetic diversity The bald eagle's population reached alarmingly low numbers due to habitat loss and with low populations, there is not as much genetic variability. With fewer variations, a species survival is difficult to overcome without conservation efforts.

~USATestprep~

What is the correct chromosomal condition at prometaphase of mitosis?

Answers

Final answer:

In prometaphase of mitosis, chromosomes compact and become visually distinguishable, the nuclear envelope breaks down, and the mitotic spindle's microtubules attach to the kinetochores on the chromosomes.

Explanation:

During the prometaphase of mitosis, the chromosomal condition is that each chromosome compacts and becomes visually distinguishable under a light microscope. The nuclear envelope begins to break down, and the chromosomes, composed of two sister chromatids, free in the cytoplasm of the cell. Moreover, the microtubules from each centrosome, constituents of the mitotic spindle, attach to a specific protein structure on the centromere of each chromosome called a kinetochore. This ensures that each daughter cell receives an equal distribution of chromosomes during the ensuing mitotic phase, metaphase.

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The vascular pressure that declines from roughly 35 mm hg to about 18 mm hg is the

Answers

The correct answer is "capillary hydrostatic pressure". 

The 35 mmHg is the pressure in the arterioles. This pressure will go down as there is an increase in resistance to blood flow in the arterioles before going to the capillaries. 18 mmHg capillary hydrostatic pressure is roughly the average of the arterial pressure and the venous pressure.

Dna is wrapped around proteins called _____ to form a chromosome.

Answers

Final answer:

DNA in eukaryotic cells is wrapped around histone proteins to form nucleosomes, which create the 'beads on a string' structure. These are further compacted to form chromosomes, especially during cell division.

Explanation:

DNA is wrapped around proteins called histones to form a chromosome. Eukaryotic DNA, which is negatively charged due to phosphate groups, is tightly wound around these positively charged histone proteins. The formation begins with DNA winding around an octamer of histones to create a structure known as the nucleosome. This structure resembles "beads on a string", with each "bead" representing a nucleosome and the string being the linker DNA.

The arrangement is then coiled into a 30 nm fiber and, during cell division, becomes even more densely packed into chromosomes by additional scaffold proteins. This packaging method is central for fitting DNA into the nucleus of eukaryotic cells and for the regulation of gene expression.

He movement of which kind of molecules is controlled by osmosis?

Answers

Osmosis is the controlled movement of free water molecules though a selectively semi-permeable membrane from a region of high water concentration to a region of low water concentration. Using this definition osmosis will be the movement of water molecules.

How can pools of blood aid in reconstructing a crime scene?

Answers

The presence or absence of blood can give valuable information about the nature of a crime. A crime scene with minimal blood but massive wounds to a victim can tell investigators that the site was a possible body dump and not the true scene of the murder.

A crime scene with blood but no victim can also give information. A person cannot survive if too much blood is lost so investigators can tell that the missing individual has been killed because of the amount of blood present.


The main energy resource used by industrialized countries is

Answers

Fossil fuels. Industrialized countries use coal and gas to run their cars, heat their homes, and provide electricity.

Where are cardiac pacemakers usually positioned during​ implantation?

Answers

I believe they are positioned Beneath one of the clavicles. Pacemaker is a small device that's placed in the chest or abdomen to help control abnormal heart rhythms. This device uses electrical pulses to prompt the heart to beat at a normal rate. Pacemakers are used to treat arrhythmias. Arrhythmias are problems with the rate or rhythm of heartbeat.

If an experiment starts with 6 bacteria cells and ends with 96 bacteria cells, how many generations did the cells go through?

Answers

The bacterial cells went through 4 generations.
6 --> 12 --> 24 --> 48 --> 96
Final answer:

In order to calculate the number of bacteria generations, you use logarithms. Taking the log base 2 of the final number of bacteria divided by the initial number gives approximately 4 generations.

Explanation:

The generational growth of bacteria cells is typically exponential, doubling with each generation. Since we're starting with 6 cells and ending up with 96, we need to figure out how many times 6 needs to be doubled to get 96. This can be calculated by using the formula of logarithm base 2. Firstly, divide 96 by 6 to get approximately 16 then, calculating the base 2 logarithm of 16, gives us about 4. So the cells went through about 4 generations.

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Light energy from the sun is converted by plants into _____. electricity chemical energy leaves mechanical energy

Answers

Light  energy   from    sunlight   is  converted  by  plant  into  chemical  energy.This  chemical  energy  is  temporarily   stored   in ATP  and  the   energy  carrier  molecules  that is  NADPH.      This  involve  a   process  known  as  photosynthesis  whereby  radiation  energy  from   sunlight   is   converted to  chemical  energy .Photosynthesis  involve  a  series    of  steps   and  uses  solar  energy,water  and   carbon  dioxide  to  produce  organic  compounds

Answer:

chemical energy

Explanation:

In starfish, pink boy color(P) is dominant to orange(p) , and thick eyebrows(T) are dominant over thin(t) ones. Patrick , who is heterozygous for body color but purebred for thick eyebrows , has met Patti , who is recessive for both traits.


What's patti's phenotype?

Is it possible for the new couple to have offspring that resmeble their mother? explain?

Answers

Phenotype is the actual description of the traits based on the genotype. The genotype of Patti is pptt both recessive so both recessive traits are expressed. So her phenotype is orange-colored with thin eyebrows

To answer your question 2, we can use a Punnett Square:
Genotype of the parents:
PpTT and pptt

        PT       PT       pT        pT
pt   PpTt   PpTt     ppTt     ppTt
pt   PpTt   PpTt     ppTt     ppTt
pt   PpTt   PpTt     ppTt     ppTt
pt   PpTt   PpTt     ppTt     ppTt

Remember that dominant traits are always expressed. Based on the Punnett square that there is always a dominant T trait in each, which means that the offsprings of Patrick and Patti would have thick eyebrows.  The mother Patti has thin eyebrows. So the answer is no in terms of eyebrows.

When it comes to skin color, for the offsprings to be the same as their mother, the genotype of the skin color should be both pp, and there are 8 out of 16 squares, so there is a 50% chance that they will have orange skin.

If the condition is that they should have both thin eyebrows and orange skin, then the answer is it would be impossible.  

How does the structure of a red blood cell relate to its function?

Answers

The main function of a red blood cell transport the oxygen throughout the body to other cells. It has haemagoblin that allow the binding of oxygen. It’s biconcave shape maximizes the surface area to increase efficiency of oxygen absorption and allows it to “squeeze” through narrow vessels and can enter thinnest capillaries through the body. Red blood cells don’t have a nucleus, so it increases the oxygen capacity.
Help this helps! ;)

Due to its biconcave shape, red blood cells have the ability to deliver the amount of oxygen to various organs and tissues of the body of an individual.

What do you mean by Red blood cells?

Red blood cells may be defined as a type of blood cell that is made in the bone marrow and found in the blood which contains hemoglobin.

Red blood cells do not have a nucleus in their structure and contain hemoglobin which increases the affinity of oxygen to bind with it and transport this bound oxygen to the whole body through the transport of bounded oxygen with hemoglobin particles.

Therefore, the function of RBCs with respect to their structure is described above.

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Whale calves have a high survival rate, with most calves reaching adulthood. However, their aquatic ecosystem contains a limited amount of resources, so uncontrolled exponential growth isnt possible. Identify the graph that represents the survivorship pattern of whales. How did Greek sculptures of figures differ from Egyptian and Roman ones?A. They were very sturdy, with arms and legs positioned close to the torso.B. They depicted individuals who were physically unfit in the contraposto poseC. They first showed the contraposto pose, with the weight shifted to one leg and the body in an S-curveD. They were carvings made of cream-colored ivory Which of the following elements contains a web page's metadata? What is the value of x in the triangle? Polygon D is a scaled copy of Polygon C using a scale factor of 6. How many times larger is the area of Polygon D than the area Polygon CCC? The two dna strands run in opposite directions. what vocab word describes this orientation? Suppose given an isosceles triangle with a leg measuring 5 in. Two lines are drawn through some point on the base, each parallel to one of the legs. Find the perimeter of the constructed parallelogram. What Chinese invention allowed ships to move there sails and sail the wind for the first time? Each of two trapezoidal prisms has a volume of 120 cubic centimeters. the prisms have no dimensions in common. give possible dimensions for each prism. Which 19th century art movement depicts modern life by frequently showing laborers and the poor?A. GothicB. RealismC. Naturalism D. Enlightenment In marketing, what are the five P's used for? When the Constitution was written, which citizens had the right to vote?A.free African American malesB.white married femalesC.white male property ownersD.married African American women Where trenches do not exist, the steep continental slope merges into a more gradual incline known as the continental ____. a abyss b zone c rift d rise Balanced rock has a mass of about 36,000 kg. If the acceleration due to gravity is 9.8m/s^2, what is the force that the rock is exerting in its pedestal Perpendicular lines AB and CD intersect at point E. If mAED = x + 20, what is the value of x?A.) 160B.) 110C.) 90D.) 70 Atp synthesis in chloroplasts is very similar to that in mitochondria: electron transport is coupled to the formation of a proton (h ) gradient across a membrane. the energy in this proton gradient is then used to power atp synthesis. two types of processes that contribute to the formation of the proton gradient are: Which simplified equation is equivalent to the equation shown below?4x+x-3-9+4x=6a.5x-8=6 b.-3x=6 c. 9x-12=6 d. 8x-12=6 A circular city park has a sidewolk directly through the rmiddle that is 111- feet long. I each bag of fertilizer covers 50 square feet, then determine how many bags of tertilizer the Parks and Recreation department needs to use to cover the circular park. Ignore oll the sidewalks around and through the park. A light beam in air strikes the surface of water at an angle of 35 to the normal. When it enters the water it bends toward the normal, making an angle of 25.5 to it. The velocity of light in air is approximately 300,000 km/s. What is the approximate velocity of light in water? A.77,000 km/s B.225,000 km/s C.278,000 km/s D.341,000 km/s Read this story summary: A tortoise and a hare have a race. After the race begins, the hare fools around and even stops to takes a nap, believing he will be the sure winner. The tortoise, however, continues to move slowly and steadily toward the finish line. Once the hare realizes the tortoise is about to win, it is too late. The tortoise wins, and the hare learns a valuable lesson about the perils of overconfidence.