Sheets composed of two layers of amphipathic molecules arranged with the hydrophilic groups on the surface and the hydrophobic groups buried in the center that form in water are called A) micelles. B) liposomes. C) vacuoles. D) bilayer membranes. E) none of the above

Answers

Answer 1

Answer:

D) bilayer membranes

Explanation:

Two lipidic bilayers compose the cell membrane. There are also proteins and glucans incrusted in between. Lipids are amphipathic molecules with hydrophilic heads -negatively charged phosphate group- and hydrophobic tails. Lipids are arranged with their hydrophilic polar heads facing the exterior and the interior of the cells, while their hydrophobic tails are against each other, constituting the internal part of the membrane. Membranes are fluid, which means that the composing molecules can move through them.

Lipids can easily change places with other neighboring lipids by lateral diffusion in the same layer. This is passive diffusion, which means that it does not need energy to happen.

Lipids can also diffuse transversally to the other layer but not as easily as lateral diffusion. Jumps between monolayers are infrequent as the lipidic polar heads meet the fatty acid barrier.

There are also other lipidic movements as rotational diffusion that imply the rotation of the molecule.  


Related Questions

"Red rust is one of the destructive diseases in tea plants which results adverse effect on tea yield. It is caused by a type of algae." Which discipline of Biology is related to explain the above statement? a. Mycology b. Agronomy c. Pathology d. Phycology

Answers

Answer:

C

Explanation:

The correct answer would be plant pathology.

The branch of biology that is generally concerned with the study of diseases is referred to as pathology. When such a study has to do with plants, it is known as plant pathology.

Mycology is the branch of biology that has to do with the study of fungi, phycology deals with the study of algae, while agronomy deals with the study of economically important crops.

Hence, the correct option is C.

In Meiosis, the cells produced are what?

Answers

Answer:

daughter cells

Explanation:

sorry have to write for 20 characters

Question 2 of 10
of the places listed, where would you expect to find the lowest air pressure?

Answers

Answer:

The lowest measurable sea-level pressure is found at the centers of tropical cyclones and tornadoes, with a record low of 870 mbar (87 kPa; 26 inHg).

Answer:

if these are your choices:
desert
beach
sea level
mountaintop

its mountaintop

Explanation:

easy biology question below first correct answer gets brainliest

Answers

A reaction at equilibrium has unchanging observable properties. However, a reaction doesn't stop when it reaches equilibrium. It just looks like it has stopped.
forwardreverse.gif (354 bytes)Instead, it continues, but it goes just as fast in the direction from reactants to products (the forward direction), as it does from products to reactants (the reverse direction). Understanding equilibrium requires an understanding of reaction rates

Plz answer, will give brainliest

Answers

Answer:

a. (black fur): phenotype

b. (AA, Aa, aa): genotypes

c. (Aa): heterozygous

d. (aa): hom0zygous recessive

e. (AA): hom0zygous dominant

Explanation:

I took genetics and biology I hope this helps !!

In what ways is a eukaryotic cell similar to a city?

Answers

Answer:  In many ways, the eukaryotic cell is kind of like a city. I will tell you what each of the organelles in a cell does. Your job will be to try to match each of the cell parts to the parts of a city and explain why they are similar. a) Golgi Apparatus: packages up proteins and labels them for distribution to other parts of the cell.

Each one, like the organs inside your body, fulfills a particular function that is required for the cell to stay alive. Consider the cells to be a miniature city. Because they all do similar jobs, the organelles could represent companies, places, or parts of the city.

What is a cell?

Cells are the fundamental building blocks of all life. Gazillions of cells make up the human body.

They support the body's structure, absorb nutrients from food, convert those nutrients into energy, and perform specialized functions.

Each one, like the organs in your body, performs a specific function that is required for the cell to survive. Think of the cells as a miniature city.

Because cell city has jobs that a plant cell does not, it represents an animal cell. In cell city, we believe that a waste disposal plant performs the same function as lysosomes, an organelle found only in animal cells.

Thus, this way, a eukaryotic cell similar to a city.

For more details regarding a cell, visit:

https://brainly.com/question/3142913

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what happens to the space inside the bell jar when the stretchy rubber is pulled down?

Answers

Answer:

The cavity inside the bell jar is airtight. As the diaphragm is pulled down, the volume of the cavity increases

Answer:

The cavity inside the bell jar is airtight. As the diaphragm is pulled down, the volume of the cavity increases.

This causes an increase in pressure within the bell jar, the air rushes out of the balloons causing them to deflate.

Please mark brainliest

Which of the following molecules contains three phosphate groups?
A. AMP
B. ADP
C. APP
D. ATP

Answers

Answer:

D) ATP contains three phosphate groups.

OAmalOHopeO

Jaleel and Lisa are simplifying the expression 2 (x minus 2) + 2 as shown. Jaleel's Method 2 (x minus 2) + 2 = 2 x minus 4 + 2 = 2 x minus 2 Lisa's Method 2 (x minus 2) + 2 = 2 x minus 2 + 2 = 2 x

Answers

Answer:

Jaleel is correct

Explanation:

Given

[tex]2(x - 2) + 2[/tex]

Jaleel

[tex]2(x - 2) + 2 = 2x - 4 + 2 = 2x - 2[/tex]

Lisa

[tex]2(x - 2) + 2 = 2x - 2 + 2 = 2x[/tex]

Required

Who is correct

Analyzing the solutions

For, Jaleel; we have:

[tex]2(x - 2) + 2 = 2x - 4 +2[/tex] --- this is correct

[tex]2(x - 2) + 2 = 2x - 2[/tex] --- this is correct

For Lisa, we have:

[tex]2(x - 2) + 2 = 2x - 2+2[/tex] --- this is incorrect because:

[tex]2(x - 2) + 2 \ne 2x - 2+2[/tex]

Hence, Jaleel is correct

Answer:

d

Explanation:

Which compound is known as end product of purine nucleotide metabolism? * Uric acid Carbonic acid Uronic acid Citric acid

Answers

Uric acid is the answer mate

Which organism obtains its energy exclusively from dead or decaying matter?

Answers

Answer:

Bacteria obtains energy from dead bodies of animals and plants.

The decomposers are the organism, which feed on the dead and decaying matter.

If Darwin knew of Mendel's work, how might it have influenced his theory of evolution? Do you think this would have affected how well Darwin's work was accepted?

Answers

Answer:

See explanation

Explanation:

According to Darwin, the determinant of the ability of species to thrive in their environment is their ability to develop favourable characteristics which enable them to survive in their environment. This ability to develop favourable characteristics is called natural selection.

These favourable characteristics are passed on from parents to offsprings and are responsible for the perpetuation of organisms having these favourable characteristics in comparison to other members of the same species.

In relation to Mendel's theory, these favourable characteristics could be regarded as Mendel's factors (currently identified as genes). These factors are units of inheritance passed on from parents to offsprings.

If Darwin had an idea of Mendel's work when he propounded his evolution theory, he could have modified his idea of favourable characteristics to imply genes. This would have made his idea more empirical than speculative and led to a faster world wide acceptance of his ideas.

What does it mean to analyze data?

Answers

Data exploration
Biological analysis approaches produce comprehensive, high-level summaries of the biology most significantly affected in an experiment. These can include molecular networks, disease processes and biological pathways.


I think this the answer

Answer:

The process of examining, cleaning, converting, and modeling data with the purpose of uncovering relevant information, informing conclusions, and assisting decision-making is known as data analysis.

OAmalOHopeO:

PLZZ HELP

Phosphorus is mainly found in the environment stored in
A. the atmosphere
OB. legumes
C. mineral deposits
D. denitrifying bacteria

Answers

Answers: I think it’s a or c

Explanation:

An amino acid analyzer is an instrument used to determine a. the sequence of amino acids in a polypeptide chain b. the presence of modified amino acids in a protein c. the identity of N-terminal and C-terminal amino acids in a protein d. the identities and relative amounts of amino acids in a protein

Answers

Answer:

d. the identities and relative amounts of amino acids in a protein

Explanation:

An amino acid analyzer is an automated machine that is used to determine the identities and quantities of amino acids in a given protein, peptide, and cellular samples. It makes use of the ion-exchange chromatography principle to determine the presence of amino acids. When the chromatogram is obtained, the relative amounts are then determined by the analyzer.

Since proteins are made of sequences of amino acids, the identities of proteins can also be obtained through this method. Ninhydrin, in the chromatographic column, reacts with the present amino acids under an ultra violet detector and is then observed at a wavelength of about 440 - 570nm.

help asap if possible!

what were the four key concepts of Darwin's theory of natural selection?

then explain how Lamarck's theory was different and why it got rejected over time?

Answers

i only know the answer to the first one. the four key concepts are variation in each human, inheritance is passed down from generation to generation, that more offspring are produced than what the world can support, and survival of the fittest, i believe

In terms of base nucleotides, explain the only difference between the DNA message for normal hemoglobin and the DNA message for sickle-cell hemoglobin.

Answers

Answer:

In the 1950s, Vernon Ingram demonstrated that the only structural difference between normal adult hemoglobin and sickle-cell hemoglobin is the replacement of glutamic acid with valine in the β-globin amino acid chain (Ingram, 1957; 1959).

its may help you

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14). Clonal selection and differentiation of B cells activated by antigen exposure leads to the production of ________. A) large quantities of the antigen initially recognized B) vast numbers of B cells with random antigen-recognition receptors C) long-lived erythrocytes that can later secrete antibodies for the antigen D) short-lived plasma cells that secrete antibodies for the antigen

Answers

Answer:

The correct answer is D) short-lived plasma cells that secrete antibodies for the antigen

Explanation:

Each B lymphocyte has an antigen receptor (BCR: B cell receptor), a surface immunoglobulin (IgM or IgD), that binds to specific domains of the antigen called antigenic determinants or epitopes. Only B lymphocytes with a high antibody affinity for the antigen, and which are capable of processing and presenting it, will be positively selected. In this contact between the two cells, an exchange of chemical signals takes place that leads to the activation, clonal proliferation and differentiation of B cells into two sister subclones: one of antibody-secreting plasma cells, and the other of memory primed B cells. Therefore, only these last positively selected B lymphocytes will survive, proliferate and differentiate into plasma cells, synthesizing and secreting antibodies of a single isotypic class, with a unique specificity and high affinity, improving the ability to adhere to the antigen and, thus , neutralize and destroy pathogens.

what are the cells that pass from parents to their children

Answers

Answer:

Genes are the blueprint for our bodies. If a gene contains a change, it disrupts the gene message. Changes in genes can cause a wide range of conditions. Sometimes a changed gene is inherited, which means it is passed on from parent to child. Changes in genes can also occur spontaneously.

which example best shows that the chemisty of water is helpful to plants​

Answers

yea same the answer above is correct

When Dr. Philip tierno conducted his experiment on the pillows , he wanted to know the connection between pillows and the allergy-causing germs. He was trying to answer the question, Do these pillows contain germs that contribute to the family allergies?

Answers

Answer:

Yes. That was the question he was trying to answer.

Explanation:

To conduct the experiment investigating the connection between pillows and disease-causing gems, Dr. Philip needs to ask himself whether the pillows that will be used in the research contain germs that contribute to allergies in a family. This question allows Dr. Philip to have the basis to start his research and come to a conclusion about the pillows used in the research. Furthermore, the research points directly to the main point of the story.

Answer:When Dr. Philip Tierno conducted his experiment on the pillows, he wanted to know the connection between pillows and the allergy-causing germs. He was trying to answer the question, Do these pillows contain germs that contribute to the family’s allergies?

Explanation:Edmentum

plants make glucose using energy from the sun and two molecules. which two molecules do they use ?

Answers

Plants convert energy from sunlight into sugar in a process called photosynthesis. Photosynthesis uses energy from light to convert water and carbon dioxide molecules into glucose (sugar molecule) and oxygen (Figure 2).

what part of a glucose molecule provides electrons in cellular respiration?

Answers

Answer:

Hydrogen atoms are the part of the glucose molecule that provides electrons in cellular respiration.

OAmalOHopeO

Hydrogen atoms are the part of the glucose molecule that provides electrons in cellular respiration. (b) Electron transport complexes set up a proton gradient by passing protons from the mitochondrial matrix to the intermembrane space. NADH gives up the two electrons it carries to NADH hydrogenase.

What keeps the Sun from expanding any further? A. Solar wind B. Hydrogen C. Gravity D. Visible light

Answers

Answer: The answer is B. Hydrogen.

Explanation:

IN YOUR OWN WORDS, what is the definition for color blindness (include what is special about how this is inherited)

Answers

Answer:

Color blindness is the inabiliy to see certain colors of the color spectrum. This disease is hereditary and passed down from your parents.

Explanation:

Answer:

Explanation:

Yes

In a well-fed human eating a Western diet, the richest source of stored chemical energy in the body is ________. In a well-fed human eating a Western diet, the richest source of stored chemical energy in the body is ________. glucose in the blood fat in tissue calcium phosphate in bone glycogen in muscle cells protein in muscle cells

Answers

Answer:

fat in tissue

Explanation:

Biomolecules like carbohydrates, fats etc. are well known for their energy storing abilities. Glucose, as a carbohydrate, is the most used source of energy but is stored in excess as glycogen in the muscle and liver cells.

However, fats are far more efficient in storing energy than carbohydrates or proteins because they give more ATP per molecule. Fats are stored in tissues of the body called ADIPOSE tissues. Hence, the richest source of stored chemical energy in the body is FATS IN TISSUES.

Cell specialization is important during the growth and development of
a multicellular organism. This process is most directly regulated by

Answers

Answer:

Protein

Explanation:

A cell can be defined as the fundamental or basic functional, structural and smallest unit of life for all living organisms.

Cell specialization is also referred to as cell differentiation and it can be defined as a biological process through which generic cells transform into specific cell types, so as to enable them perform certain functions within the body of a living organism.

Simply stated, it's the special function or job in the body of a living organism that are associated with cells.

Generally, cell specialization plays a significant role in the development of embryos.

Some living organisms are unicellular while others are multicellular in nature.

A unicellular organism refers to a living organism that possess a single-cell while a multicellular organism has many (multiple) cells.

Cell specialization is fundamental and key for the growth and development of a multicellular organism.

Furthermore, cell specialization as a process is most directly regulated by protein; one super regulating protein encourages cell differentiation while the other tries to stop or prevent the process. These proteins are referred to as master regulating proteins or Helix-Loop-Helix proteins.

Nitrogen is the most common element in the air. Why do bacteria play a role in the nitrogen cycle?

Answers

Explanation:

Bacteria play a role in the nitrogen cycle because:

The bacteria’s helps in breaking down the organic materials which has nitrogen in it, and helps in giving the nitrogen back to the cycle. Bacteria helps in breaking down of the leaves and then it diffuses the nitrogen to the soil. Prokaryotes also plays an important role in the nitrogen cycle. The nitrogen fixing bacteria present in the root zone of plants basically in the soil, helps in conversion of the nitrogen into ammonia. Then the nitrifying bacteria converts the ammonia to the nitrites or can say nitrates.  

Answer:

sorry I didn't know hahaha

Which statement is true of gravity?

A. gravity takes up space

B. everything that has mass, has gravity

C. gravity can be seen

Answers

B. Everything that has mass, has gravity

What is the name of for a different froms of gene

Answers

I’m guessing you’re talking about an allele, that would be your answer.
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