Why is there Cholesterol in your cell membrane?

Answers

Answer 1

Answer:

Cholesterol functions to immobilise the outer surface of the membrane, reducing fluidity. It makes the membrane less permeable to very small water-soluble molecules that would otherwise freely cross. It functions to separate phospholipid tails and so prevent crystallisation of the membrane.

Explanation:

Answer 2
Cholesterol functions to immobilise the outer surface of the membrane, reducing fluidity. It makes the membrane less permeable to very small water-soluble molecules that would otherwise freely cross. It functions to separate phospholipid tails and so prevent crystallisation of the membrane.

It helps to restrict the passage of molecules. Since it is small, it can work to fit and block off water soluble molecules from diffusing into the membrane.

Related Questions

a cell was poisoned by a substance that destroyed all of its mitochondria. which cell transport processes would be able to still continue?​

Answers

Answer:

Nothing

Explanation:

If a cell's mitochondria were destroyed it would die. Mitochondria are the power houses of the cell and without energy, necessary reactions could not take place .

If a mitochondria stopped working the cell would not have its respiratory function such as to use carbon dioxide, water, and energy in which the cell needs to survive so the cell would eventually stop moving and slowly die out with no nutrients and energy.

Exercise 4 (Module 6.9) Glycolysis is the first of three steps in cellular respiration. Review glycolysis by matching each phrase on the right with a term on the left. Some terms are used twice.
_____ 1. Compound formed between glucose and pyruvic acid
_____2. Not involved in glycolysis _____3. Fuel molecule broken down in glycolysis
_____ 4. Produced by substrate-level phosphorylation
_____5. Invested to energize glucose molecule at start of process
_____ 6. Reduced as glucose is'oxddized _____7. Glucose converted to two molecules of this
_____8. Assembled to make ATP
_____9. "Splitting of sugar"
_____10. Carries hydrogen and electrons from oxidation of glucose
A NADH
B. Pyruvic acid
C. ATP
D. NAD+
E Glucose
F. Glycolysis
G. ADP and P
H. Oxygen
I. Intermediate

Answers

Answer:

Explanation:

?????????? i don't undrssanted

Because most nerve cells do not typically undergo mitosis, they are generally not capable of which of the following?a.producing enzymesb.generating more nerve cellsc.performing cellular respirationd.transporting ions against a concentration gradien

Answers

Answer:

B. generating more nerve cells

Explanation:

Mitosis is the process whereby a cell divides into two genetically identical daughter cells. It is way through which living cells reproduce and multiply themselves.

Hence, a nerve cell that do not typically undergo mitosis will be incapable of replicating/multiplying itself, hence, unable to generate more nerve cells.

Guys I need help with this

Answers

Answer:

I believe it's B, its been a while since I last studied cells so I might be wrong

Explanation:

Answer:

 B  

Explanation

Es l segunda de arribaa

PLEASE HELP! :(


According to the graph, what condition is best for enzyme activity?

Answers

Answer:

C

Explanation:

Highest peck in enzyme activities

Which of the following occurs during telophase II? Select all that apply.

1) New nuclei begin to form
2) The centrioles pull at the chromatids
3) Chromatids arrive at opposite ends of the cell
4) Chromosomes are drawn to the metaphase plate
5) Cytoplasm divides and two daughter cells are formed

Answers

Answer: 1, 3, 5

new nuclei begin to form

chromatids arrive at opposite ends of the cell

cytoplasm divides and two daughter cells are formed

Answer:

Which of the following is the correct order of the stages of meiosis II?

prophase, metaphase, anaphase, telophase

 

Which of the following occurs during telophase II? Select all that apply.

new nuclei begin to form

chromatids arrive at opposite ends of the cell

cytoplasm divides and two daughter cells are formed

Explanation:

given the Dna Strand: ATG-CAG-AGA how would i transcribe the corresponding RNA Strand ?

Answers

Answer:

The RNA strand that is transcribed from the DNA strand sequence ATG-CAG-AGA is UAC-GUC-UCU, according to the complementarity of nitrogenous bases.

Explanation:

In order for DNA to RNA transcription to occur, one must be aware that:

The transcription meets the criteria of base complementarity, where a purine binds to a pyrimidine. In RNA there is no thymine, so it is replaced by uracil.  

Given a given sequence of bases the RNA resulting from transcription will be governed by these rules:

DNA: ATG-CAG-AGA

RNA: UAC-GUC-UCU

Where:

Adenine is transcribed in Uracil. Thymine (DNA) is transcribed into Adenine. Cytosine is transcribed into Guanine. Guanine is transcribed into Cytosine.

Long lashes (L) are dominant over short eyelashes (l). Complete a Punnett Square crossing two parents that are both heterozygous for long eyelashes.

Answers

I believe the answer would be
L. l
Top- L LL, Ll,
Bottom- l Ll, ll.

heart muscle cells have alot of mitochondria. why do you think this is?​

Answers

Answer:

The heart is a vital organ with a high metabolic demand. Our heart muscles contain so much mitochondria because those muscles are very active in our body and require lots of energy to constantly pump blood through our circulatory system.

Explanation:

How do you do this thing that i have to do that is this

Answers

Answer:

C

Explanation:

You do this thing that is this that you have to do by doing that thing with the things so you get a thing. Got it?

Answer:

It would not be the one that you clicked, i think its C because you have nothing to distribute on the outside

Explanation:

What are the characteristics of this layer that make it the ideal layer for the Concorde to travel?

Answers

Answer:

The temperature increases with weight

Explanation:

Characteristics of the layer that make Concorde to travel is The temperature increases with weight.

How did Concorde fly so high?

Concorde fly so high because the higher it flew, the thinner the air was that it encountered. This consequently led to less drag and fuel burn.

Did the Concorde fly in the stratosphere?

Able to cruise at a near-stratospheric altitude of 60,000 feet at 1350 miles per hour, the plane cut travel times on its routes in half. But speed and altitude were not the only factors that made Concorde so remarkable.

To learn more about Concorde ,here

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Which of the following nitrogen bases is present only in RNA and not in DNA?

Answers

Answer:

The nitrogen base uracil is only present in RNA. It replaces the Thymine used in DNA and bonds with Adenine.

Explanation:

a variable that stands alone and isn’t changed by the other variables you are trying to measure

Question 6 options:

independent variable


test-o-matic group


dependent variable


control group

Answers

Answer: independent variable

The nucleus _____.
A.has a net negative charge

B.contains the electrons, protons, and neutrons

C.is the center core of an atom

Answers

Answer:

C

Explanation:

Answer:

C.

Explanation:

A. is wrong because the electrons are on the outermost of the atom; that would also mean that B. is wrong. C is correct because the nucleus is, in fact, the center core of the atom.

Describe how the process of natural selection can result in an increase in frequencies of certain traits found in a population.

Answers

An individual may carry a very beneficial genotype with a resulting phenotype that, for example, increases the ability to reproduce

Answer:

Natural Selection (Answer Below)

Explanation:

Natural Selection is the selection of a more beneficial trait. For example, if trees get covered in soot all the white beetles and butterflys are going to stand out like a sore thumb, but the beetles and butterflies that adapted and evolved now have better traits that help them hide predators. The predators have a harder time finding the now black colored butterflies and beetles due to the black soot meaning the beetles and butterflies will have a higher survivability

which of the following statements best explains why plants wilt​

Answers

Answer:

needs more context bro

Plants wilt due to lack of water. Dehydration of the plant will cause it to collapse. They also wilt sometimes to prevent damage from high temperatures and the sun. Hope this helps.

A researcher is comparing sugar molecules that a cell takes in with amino acid molecules that the cell produces. Highlight all the statements that are true about amino acids but not true about sugars,
Always contain carbon
3. an input in glycolysis
C.typically contain nitrogen
D. can be used as an energy source
E can bond together to form proteins

Answers

Answer:

The correct statements for amino acids but not for sugars are :

C. typically contain nitrogen

E can bond together to form proteins

Explanation:

Both Sugars and amino acids always contain carbon molecules and both macromolecules can provide energy so are the source of the energy. Sugar molecule more specifically glucose molecule enters glycolysis during the cellular respiration process.

Amino acids always contain the nitrogen molecule in the structure along with carbon, oxygen, and hydrogen, there is a side chain present. Amino acids are the building blocks of the protein, peptide bonds are formed by amino acids together to make a poly peptide chain of a protein molecule.

i need help please
i didn’t really understand but i put the text boxes in circles now , please help i’ll give brainlest!

Answers

Answer:

Explanation:everything looks good

Answer:

its converted transformed destoryed matter

Explanation:

type a paragraph summarizing cellular division and differentiation
PLS HELP!!! PROJECT DUE IN 30 MINUTES!!

Answers

Answer:

Cellular differentiation is the process in which a cell changes from one cell type to another. Usually, the cell changes to a more specialized type. ... Differentiation continues in adulthood as adult stem cells divide and create fully differentiated daughter cells during tissue repair and during normal cell turnover.

Answer:

Cellular differentiation is when a cell changes from one cell type to another—usually, the cell changes to a more specialized class. Differentiation continues in adulthood as adult stem cells divide and create fully differentiated daughter cells during tissue repair and average cell turnover.

Explanation:

IM A DIFFERENT BREED!

3 things in common between Active Transport
and Passive Transport

Answers

Answer:

Active and passive transport are similar in that they both transport ions, using ion channels to move ions across the cell membrane.

Explanation:

Hope that this helps!

A brown eyed person (BB) and a blue eyed person (bb) have several children. Which of these statements describe the probable eye color of their children?

1.All will have blue eyes
2.All will have brown eyes
3.Half will have brown eyes, and half will have blue eyes
4.Less than half will have brown eye

Answers

Answer:

2. B. All will have Brown Eyes

Explanation:

Brown is dominant, so all children will have Bb, brown eyes

Answer:

Im pretty sure theyll have brown eyes if not my bad

Explanation:

17. Which of the following best describes how amino acids affect the tertiary structure of a
protein?
a) The number of amino acids determines the tertiary structure of the protein.
b) The interactions of the different R-groups with other R-groups and with their environment
determine the tertiary structure of the protein.
c) The R-group of the last amino acid that is added to a growing polypeptide chain
determines the next amino acid that is added to the chain.
d) The sequence of the amino acids in the polypeptide chain determines the protein's
primary structure but has no effect on its tertiary structure.

Answers

Answer:

It is B

Explanation:

I had this question on my test last week

The tertiary structure of the protein is determined by the interactions of the different R-groups with other R-groups and with their environment in the protein (Option B).

An R-group (also called variable group) is a side chain that is attached to the α-carbon of the amino acids, the building blocks of proteins.

The linear sequence of amino acids within a protein is the primary structure of proteins.

The second structure of proteins is determined by the pattern of hydrogen bonding in the peptide backbone. The most common secondary structures of the proteins are alpha-helices and beta-sheets.

The protein tertiary structure is the 3D (tridimensional) shape of the protein, which is due to interaction among R groups of amino acids and with their environment.

The most common tertiary structures of the proteins are globular and fibrous structures.

Finally, the quaternary structure of the proteins is determined by the interaction of several protein chains or subunits.

In conclusion, the tertiary structure of the protein is determined by the interactions of the R-groups and with their environment in the protein (Option B is correct).

Learn more in:

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Help pls
It would mean a lot

Answers

I think it’s B) CO2 (this is the equation of respiration)

DESCRIBE THE FUNCTION OF A CELL MEMBRANE AND ITS RELATIONSHIP TO WHAT HAPPENS INSIDE A CELL

Answers

Answer:

cell membrane's main function is to act as a selectively permeable barrier to the transport of materials across it. Membrane is made up of phospholipids arranged in a bilayer fashion. The phospholipids are amphipathic in nature, that is, contain both a hydrophobic and a hydrophilic end.

Explanation:

13) When mRNA is "processed", what are the pieces of mRNA that are cut out and stay in the nucleus?

Introns

Exons​

Answers

Answer:

Introns

Explanation:

The coding region of the gene is the part of the gene that is transcribed. However, not all of the gene makes the final mRNA. There are sequences called exons and introns in the coding region of the gene.

The pre-mRNA contains transcribed sequences of both the introns and exons. However, the introns are removed from the final mRNA by splicing. The final mRNA that is translated to the protein only contains exons. An illustration is attached to illustrate this.

are nutrients recycled through living systems? is energy recycled through living systems?​

Answers

Both answers are correct.

brainliest for correct answer

Answers

Answer:

I am pretty sure it is B. Upwelling

Some types of yogurt are probiotic, meaning they contain active bacteria. Why would someone most likely eat probiotic yogurt?

to decrease the amount of antibiotics in the body
to increase the amount of antibiotics in the body
to decrease the amount of harmful bacteria in the body
to increase the amount of helpful bacteria in the body

Answers

Answer:

D to increase the amount of helpful bacteria in the body.

Explanation:

I did it on edge 2020 hope this helps you :)

I just don’t know the last system

Answers

Answer:

The Endocrine System

Explanation:

Because a hormonal mechanism is created by the kidneys for the maintenance of blood pressure by stabilizing blood volume.

if you answer this in a short paragraph I'll answer your newest question, give you brainliest, 5 star rating, and thanks. <3

How are precipitation and temperature different between the polar and tropical climate zones?

Answers

Answer:

Ok ill do it :D

The polar and tropical region temperature and preticaplation are different in many ways. The tropical climate temperature is warm compared to the Polar temperature The Tropical region precipitation is rain and lots of rain. The polar regions precipitation is mostly snow and hail.  These two climate zones are different because where they are located on the globe. All in all there are many differences between these two regions.

Hope this helps ;D

Explanation:

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