the transport a very large molecules such as proteins​

Answers

Answer 1

Answer:

Very large molecules such as proteins are too big to move through the cell membrane which is said to be impermeable to them. The type of transport proteins present in a cell membrane determines which substances the membrane is permeable to. CO2 molecules pass directly through phospholipids. Glucose molecules travel through the proteins.


Related Questions

thinking about the components in pcr, do you think there are major differences in the process of dna replication between species?

Answers

The major difference in the process of DNA replication between species is the linear order of nucleotides, which can be amplified by PCR. This technique enables the amplification of specific DNA fragments.

The Polymerase chain reaction (PCR) is a technique widely used in molecular biology in order to amplify and thus identify small DNA fragments (approx. 1000 pb).

The PCR uses all materials required to carry out DNA replication: a thermostable DNA polymerase, primers (DNA oligonucleotides), deoxyribonucleotides (ddA, ddG, ddC, or ddT), and template DNA.

The template DNA indicates the linear order of nucleotides that will be added to the amplified DNA fragment, which is highly specific and may vary even between individuals of the same species.

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Which ball-and-socket joint is the most freely moveable joint in the body?

Answers

Answer:

c. Glenohumeral joint

Explanation: is correct (the Shoulder joint)

What of the following best explains the pace and timing of evolutionary change?

A: Evolutionary change quickly and constantly occurs throughout time.

B: The pace of evolutionary change has slowed down over time, and it only rarely occurs now.

C: Periods during which evolution occurred were always preceded by a catastrophe.

D: Long periods of stability were punctuated with periods of evolutionary change.

Answers

Answer:

B: The pace of evolutionary change has slowed down over time, and it only rarely occurs now.

Explanation:

What of the following best explains the pace and timing of evolutionary change The pace of evolutionary change has slowed down over time, and it only rarely occurs now.

Answer:

D: Long periods of stability were punctuated with periods of evolutionary change.

Explanation:


Diffusion and Osmosis, including the words hypertonic, hypotonic, isotonic, and
concentration.

Answers

Answer:

Where is the question!??

Which layer in the blood vessel is composed of smooth muscle, allowing it to dilate or constrict?

Tunica intima
*Tunica media
Tunica externa
Endothelium

Answers

Answer:

b. Tunica media

Explanation:is correct

Answer:

B. Tunica media

Explanation:

Oceans are being threatened daily by human activities which of the following best describes one way oceans are being impacted?

Answers

plastic - urban run off, wind, littering, rain, floods etc… plastic getting into the ocean can be highly dangerous for many species as it can kill animals such as fish and seahorses. many animals a year die from plastic in there system.

How is Wallace's view scientific

Answers

Wallace argues that changes in species are not a result of specific individual needs of organisms to adapt to their environment. Rather, "he states that some qualities of an individual may allow it to outlive another individual without those qualities."

What is conditioning?

Answers

Answer:

conditioning, in physiology, a behavioral process whereby a response becomes more frequent or more predictable in a given environment as a result of reinforcement, with reinforcement typically being a stimulus or reward for a desired response.

Explanation:

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Following the fusion of an egg cell and sperm cell, the resulting diploid cell divides by mitosis to create two new daughter cells. Each daughter cell contains pairs of chromosomes, with one set inherited from each parent.


Which of the following best describes the pairs of chromosomes that are present in each newly formed daughter cell?


Choose 1 answer:


A) The pairs are homologous chromosomes that have the same set of genes, but likely different variations of those genes.


B) The pairs are non-homologous chromosomes that contain different sets of genes.


C) The pairs are homologous chromosomes that have identical copies of every gene.

Answers

Answer: A

i have no idea why

The pairs are homologous chromosomes that have the same set of genes, but likely different variations of those genes. The correct option is A.

What are homologous chromosomes?

Among a pair of chromosomes with the very same gene sequence, loci, chromosomal size, and centromere location is referred to as a homologous chromosome.

One paternal and one maternal chromosome make up a homologous pair. In humans, the nucleus of a somatic cell contains 46 chromosomes.

Homologous chromosomes differ from sister chromatids because they are not identical and do not emanates from the same organism.

Sister chromatids are identical, side-by-side duplicates of each other that form as a result of DNA replication.

Homologous chromosomes do not pair together during mitosis. Homologous chromosomes line up end-to-end in mitosis so that when the cells divide, each daughter cell receives a sister chromatid from both members of the homologous pair.

Thus, the correct option is A.

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easy one - giving brainly if correct.​

Answers

Answer:

ur answer A is correct i think-

Explanation:

What is ATP called after it loses its 3rd phosphate group?

Answers

When the terminal (third) phosphate is cut loose, ATP becomes ADP (Adenosine diphosphate; di= two), and the stored energy is released for some biological process to utilize.

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How can using a dam as a source of freshwater also harm wildlife?
A. Dams help control floodwaters.
B. Dams provide drinking water.
C. Dams displace existing habitats.
Ο Ο
D. Dams provide water recreation.

Answers

Answer:

c

Explanation:

because its the only one that would be hurting wild life.

Using a dam as a source of freshwater can harm wildlife by displacing existing habitats. Therefore, option (C) is correct.

What are the negative impacts of dams?

Dams often require the creation of reservoirs, which can submerge large areas of land and alter the natural flow of rivers and streams. This can lead to the loss of important habitats for fish, mammals, and other wildlife that rely on rivers and streams for food, shelter, and reproduction.

In addition, changes in water temperature, dissolved oxygen levels, and water flow can negatively impact aquatic ecosystems downstream from the dam.

These impacts can be mitigated through careful planning and management, such as the creation of fish ladders and other structures to help fish navigate past the dam, and the release of water at appropriate times to mimic natural flow patterns.

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In the diagram of the human digestive system, what organ is labelled 5?

Answers

Answer:

The large intestine

Explanation:

The large intestine is a long, tube-like organ connected to both the small intestine and the anus. In an anatomy drawing, it looks almost as if it is wrapped around the small intestine.

As we can see in the drawing, the organ labelled with 5 is wrapped around another organ which is smaller and looks longer. This smaller organ is the small intestine. Since we know that the large intestine wraps around the small intestine, we can infer that the organ is the large intestine.

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Share three ways you would take to reduce water pollution.

Answers

1. Pick up trash
2. Don’t use fertilizer
3. Save water by using less showering, not letting water run while brushing teeth

What makes social animals unique?

Answers

Answer:

In these species, members of the group depend completely on one another. Different animals within the group have different jobs. Therefore, group members must work together for the good of all. Most species of ants and bees are highly social animals.

Explanation:

What is the phase shown below?

Prophase
Metaphase
Telophase
Anaphase

Answers

Answer:

Telophase

Explanation:

Telophase is the answerrr

Articulations are classified by their function or structure. Which of the following is an example of functional classification?

Answers

Answer:

d. Synarthrotic joints  

Explanation:  is correct for the choices offered.

Define: Heterogeneous Distribution, Modularity and Nestedness.

Answers

Explanation:

Nestedness is another computational approach that provides a description of groups of webs..

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Answer:

Heterogeneous Distribution, Modularity

Heterogeneity in statistics means that your populations, samples or results are different. It is the opposite of homogeneity, which means that the population/data/results are the same. ... For example, if everyone in your group varied between 4'3″ and 7'6″ tall, they would be heterogeneous for height.

Explanation:

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What is the role of knowing the Earth's history to mankind?​

Answers

Answer:

Earth history enables us to understand those changes which no human being has ever seen (or if they have, they didn't record it) and to relate them to modern changes. Such events include: The rise and extinction of the dinosaurs. The formation of the Grand Canyon.

Explanation:

Answer:

Earth history enables us to understand those changes which no human being has ever seen (or if they have, they didn't record it) and to relate them to modern changes. Such events include: The rise and extinction of the dinosaurs. The formation of the Grand Canyon.

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The active ingredient in which of the following drugs mimics a natural neurotransmitter?

Answers

Answer:

b. marijuana is correct

Explanation:

3. In the context of the article, how are we changed by war? Cite evidence from this text, your own experience, and other literature, art, or history in your answer


please help

Answers

Answer:

She wrote letters and diaries by talking about the war.

Why do cells become specialized in the human body?

Answers

Answer:

They can become any type of cell in the body.

Explanation:

They can transport molecules, metabolize nutrients, and reproduce within this one cell. ... Cell differentiation is the process by which cells become specialized in order to perform different functions. Specialized Cells in the Human Body. Multicellular organisms begin as just one single cell—a fertilized egg.

which organelle could be used to distinguish between a plant cell and an animal cell?

Answers

Answer:

Plant cells have a cell wall, chloroplasts, plasmodesmata, and plastids used for storage, and a large central vacuole, whereas animal cells do not.

Why kharif crops cannot grow in rabi seasons?

Answers

Answer:

We know that kharif crops such as paddy need more water to grow healthy, which requires in rainy season. But in winter season , which does not requires so much, hence kharif crops cannot grow in this season healthy and properly. Therefore kharif crops cannot be grown in rabi season.

Does sugar free red bull have energy for cellular respiration and if so what kind?

Answers

Answer:  yes my man

Explanation:

Answer:

Red Bull Zero and Red Bull Sugarfree contain the same main ingredients – caffeine, taurine and some B-group vitamins. Both are made without sugar, instead using different low calorie sweeteners.

Explanation:

True or False: A positive ion and a negative ion will repel each other.

Answers

Answer:

FALSE     is correct

Explanation: Questions protected!

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Answers

Answer:

The answer is C, from hydrosphere to atmosphere

Answer:

C

Explanation:

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what does a target cell require to respond to an extracellular signal molecule?

Answers

A specific protein called a receptor

One of the following statements is correct about glycolysis:

A.Net gain of only 2 ATP.
B.Glycolysis in fermentation reaction requires more oxygen than glycolysis in aerobic respiration
C.Carbon dioxide is used during glycolysis to form ATP.
D.Only animals can carry on glycolysis.

Answers

Answer:

A.

Explanation:

Glycolysis produces 4 ATP molecules in total, however 2 ATP molecules are used to convert a glucose molecule into a new 6 carbon compound with 2 phosphates attached to it. So, the net yield of ATP is 2 molecules.

Answer:

A net gain of only 2 ATP

Explanation:

Human cells have _____ sets of DNA in each cell.


A) 2

B) 4

C) 1

D) 8

Answers

Answer:

See answer below.

Answer is verified.

Explanation:

Human cells have two sets of DNA in each cell.

And a total of 46 chromosomes in each cell.

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Thanks!

Human cells have two sets of DNA in each cell. Thus, the correct option is A.

What is DNA?

DNA stands for Deoxyribonucleic acid. It is considered the genetic material of most organisms. It consists of base pairs like adenine, thymine, guanine, and cytosine.

Human cells have two sets of DNA in each cell, one came from the paternal side while the other came from the maternal side.

Therefore, it is well described above.

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