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Y_Kistochka [10]
2 years ago
8

The membrane proteins that maintain the shape of the cell membrane, form cell junctions, and allow cells to attach to the extrac

ellular matrix are ________.
Biology
1 answer:
bulgar [2K]2 years ago
5 0

The membrane proteins that maintain the shape of the cell membrane, form cell junctions, and allow cells to attach to the extracellular matrix are <u>whole proteins</u>, however, to better understand this answer, we need to know that....

<h3>Membrane proteins</h3>

The plasma membrane contains proteins that are embedded in the lipid bilayer. These perform several functions in the cell, such as:

  • Transport of substances
  • Enzymatic activities
  • and Communication between cells.

The amount of proteins and the types found in the membrane are related to the activity exerted by that cell.

The proteins present in the plasma membrane can be classified into two groups:

  • integral proteins
  • peripheral proteins.

Integral proteins are those that penetrate the phospholipid bilayer. Integral proteins capable of completely crossing the membrane are called transmembrane proteins. These may cross the membrane one or more times.

Peripheral proteins, in turn, are those that do not penetrate the plasma membrane, with only a weak connection to the membrane being observed. Because of this, peripheral proteins can be easily dissociated from the membrane.

With this information, we can conclude that integral proteins are responsible for the shape of the cell membrane, they are embedded in the lipid bilayer.

Learn more about Cell membrane in brainly.com/question/5763151

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Answer asap will give brain thing
Alenkasestr [34]

Answer:

1. Antonie van Leeuwenhoek made the first microscope and used it to look at bacteria and study bacteria, and Robert Hooke studied cells and saw cavities in the cells that looked like small boxes - he discovered plant cells! he recognized cells as the basic unit of life, a basis for Cell Theory.

2. cell theory is: every living organism is made of one or more cells, cells are the smallest units of life ( that have the properties of a living thing), All cells come from other cells  - all living things come from other living things. This relates to every living thing because all living things come under cell theory - like all living things are made of cells

3. prokaryotes, like bacteria, doesn't have a nucleus covered in a membrane. a eukaryotic cell, like an animal cell, has a membrane covered nucleus. just like the nucleus, in eukaryotes the organelles are not membrane bound. in prokaryotes, the organelles are membrane bound. In prokaryotes the DNA form is circular, while the DNA form in eukaryotes is linear. there are more, but i couldn't list them.

4. Example for prokaryote: the famous (or infamous) E. Coli bacterium. example for eukaryote: Humans!

5. Single-celled organisms (unicellular organisms) have all the functions necessary for their survival in the single cell. Multicellular organisms (many celled organisms), however, need many cells to survive and carry out all the functions necessary for their survival and do the different tasks each cell is supposed to do.

I hope this helped, please do correct me if I am wrong!

Explanation:

8 0
3 years ago
Rama de la biologia que estudia a la célula es​
const2013 [10]

Answer:

Biología celular o citología: rama de la biología que se centra en el estudio de la estructura y función de las células. Biología del desarrollo: es la rama que analiza cómo es el desarrollo de los seres vivos desde que se conciben hasta que nacen.

7 0
3 years ago
Which Mechanism of microevolution caused the the beak of the medium gound finch population on dafne major to increase in size in
expeople1 [14]

Answer:

Natural selection

Explanation:

Microevolution refers to changes produced at a lower level than species. In genetics, microevolution is the change in the allelic frequency perceptible in a few generations. Most of these naturally produced changes by mutation, natural selection, genetic flux, genetic drift.

After the drought on Daphne Major, many of the plants producing small-sized seeds decreased their reproductive rate drastically. Consequently, there were almost no seeds available for the medium ground finch to feed. The population of this species also decreased to only a hundred birds over two years. Weather conditions and food availability influenced the survival of the animals.

With time, the finched population increased again, but now, the average size of the beaks was larger. The trait modification was related to the availability of only larger seeds with thick husks.

Eating large seeds with medium or small-sized beaks was impossible, so Finches needed to adapt, developing larger beaks to crack open the husks and eat the contents of the seeds.

<u>Natural selection was responsible for the rapid change in the finches´ population beaks size after the drought. </u>The evolutive force modifies the allelic frequencies, increasing the frequency of genetic variants that expressed the larger beak size and declining the frequency of the alleles that expressed smaller beak size.  

3 0
3 years ago
A. describe two advantages, related to thermohaline circulation and surface ocean currents, of your fishery's location.
MissTica

Answer a)

To answer this question,We have supposedly taken a location of fisheries that is approximately 33° N latitude off the Californian coast. We are using dragging and trawling means to collect the fishes and they are mostly Pacific flatfish like halibut and flounder. Now let us see the questions and answer them.

• Advantages of fisher’s location - Thermohaline circulation and surface ocean currents

• One important advantage is this that there is thermocline present one the south of Pacific. This causes the upward movement of cooler, dense and nutrient rich water towards the surface and replaces the water that is nutrient deficient and warm. This nutrients can become diet of fish and attracts good enough number of fish in the area.

• The location is also valuable in terms that It is adjacent to the ocean currents, it affect better development of larval community by providing better nourishment opportunity. This can enhance the amount of fish that can be caught and used.

----------------------------------------------------

Answer b)

El Niño-Southern Oscillation s:

It is a phenomenon during which the water temperature in the sea/water body drifts in such a way that it causes an unusual periodical form in the temperature of wind and surface of sea/water body.  

Effect on the process of fish catching:

This El Niño-Southern Oscillation cause a shifting of nutrients due to which fish do not get enough food to eat and grow. They can also alter the weather patterns and pattern of water current and winds that can cause problem for the fish to settle in the ocean. Therefore, during these unfavorable events, catching fish will become difficult for a person.

----------------------------------------------------------

Answer  c)

Sustainability of fishing method:

The method of fishing we are using is not purely sustainable. It mainly attempts to compete with the other fisheries and maximize the profit and thus badly compromises the life of marine organisms in various ways. The methodology of fishing uses long line containing hundreds of hooks that is put in the water. Though it can efficiently catch fish but it can harm the life of many other marine organisms by causing them injuries.

Alternate ways we can use:

  1. We are considering to use an alternate way of catching fish called spear fishing, that does not harm other population and catches the fish in one time. It is more sustainable and can be adopted.
  2. Moreover, there is another method called regular hook and line method in which there is no catch of other marine organisms and is more sustainable than long line.

----------------------------------------------------------------

Answer d)

Two pieces of legislation that regulate fishing in U.S.  

1) The Marine Mammal Protection Act:

This law seriously prohibits the killing, hunting, harassment or export of marine mammals.

This law is important and keeps reminding us to ensure the safety of all marine mammals and donot even mistakenly use our catch that can target or harm sea mammals.

2) Fisheries Act of 1996

This law prohibits the managers and workers of fisheries to exceed the fish catching beyond a certain limit or in simple words, prohibits overfishing. To ensure the law is working, the regulatory authorities assess the fish population time by time.

This also helps us in doing the fishing in a sustainable way that can ultimately benefit both human and nature.

Hope it help!

5 0
3 years ago
To determine
kvasek [131]
بالصراحة ما بعرف وأنا كمان ما اعرف
4 0
3 years ago
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