How does the mutation present in 10% of Europeans protect their cells from HIV?

Answers

Answer 1
The mutation, which affects a protein called CCR5 on the surface of white blood cells, prevents HIV from entering these cells and damaging the immune system. Around 10% of today's Europeans carry the mutation, a significantly higher proportion than in other populations.

Related Questions

How does the nucleus control which proteins are made by the ribosomes?

1. It controls which genes get used.

2. It controls the number of ribosomes.

3. It controls the speed with which proteins are made.

4. It controls the order in which proteins are made.

Answers

Answer: it controls genes that get used.

Explanation:

PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!!PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!!

Why is it helpful for frogs to have bulging eyes?

Answers

Answer:

It is helpful for frogs to have bulging eyes because it allows them to see in all directions such as in front of them, to the sides, and partially behind them. The frog's eyes that are positioned above their head give them a field of vision of almost 180 degrees, this helps them spot predators and prey easier and quicker.

Explanation:

Which of the following statements is FALSE? *
The Rock Cycle is happening all the time on Earth.
Some processes of the Rock Cycle take a long time.
O All rocks were once Metamorphic Rocks.
O Most rocks on Earth are Igneous Rocks.

Answers

Answer:All rock were once metamorphic rocks

Explanation:

Melted rock deep inside Earth forms igneous rocks. Sand, silt, plant and animal skeletons make sedimentary rocks. Heat and pressure underground convert rocks into metamorphic rocks. Therefore, option (C) is correct.

What is rock cycle?

The rock cycle is a web of processes that outlines how each of the three major rock types—igneous, metamorphic, and sedimentaryform and break down based on the various applications of heat and pressure over the course of time. Igneous rocks are rocks that are formed by volcanic eruptions, while metamorphic rocks are formed when heat and pressure are applied to preexisting rocks. Shale, a type of sedimentary rock, can be transformed into slate with the use of heat and pressure, for instance.

The rock cycle is an important component of our dynamic Earth because it allows rocks to shift from one type of rock to another based on their location and circumstances. It recycles rocks to build new structures when plate tectonics changes the Earth's surface.

Learn more about rock cycle, here:
https://brainly.com/question/15619429

#SPJ2

Which methods reduce friction? O increasing speed O lubricating surfaces O using sticky materials O increasing surface roughness​

Answers

Answer:b)lubricating surfaces

Explanation:took it on edge hope this helped

Explain in detail how CONVECTION heat transfer effects our weather?

Answers

Answer:

The sun's waves heat the ground, causing it to warm (radiation). The energy flows from the warmer ground to the cooler air (conduction), causing it to rise (convection). When the rising air reaches a certain point, it expands, cools, and the cooler expanded air can no longer hold as much water vapor so it rains.

Explanation:

Answer:

convection occurs over a very very long time in the earth's mantle.  Rock slowly gets melted down from the core, then shoots back up from volcanoes.  The new rocks get buried by sand and sediments, and the process resets.

Explanation:

CAN YOU PLS MARK ME BRAINLIEST THANK YOU HAVE A NICE DAY!

Usable fresh surface water is relatively scarce. To many people, streams and lakes are the most visible part of the water cycle. Not only do they supply the human population, animals, and plants with the freshwater they need to survive, but they are great places for people to have fun.

Answers

Answer:

True.

Explanation:

Usable fresh surface water is scarce. Freshwater is not in excess on our planet. We can find it on lakes, lagoons, rivers, and swamps, but it is only 3% of the totality of Earth's water. The importance of this water is that it is the one that is suitable for humans, a large number of plants, and animals. This is why there are different methods to store and distribute fresh water amongst all the population and places that need it. Besides, the places where freshwater is, are great for activities, such as swimming, sailing, rafting, diving, fishing, etc.

Since freshwater is scarce and has so many uses, we must take care of it.

Which is the BIGGER (less specific) group? *
A. Phylum
B. Class
C. Species
D. Order

Answers

Answer:

Option A) Phylum is the bigger group

I think so this might be the answer

Answer:

A. Phylum

Explanation:

Hope this helps

A Carbon Sink is a reservoir which absorbs more carbon than it releases. Suggest how carbon in the bodies of crustaceans and molluscs is removed from the oceanic food chain to become part of another, slower carbon reservoir.

Answers

Answer:

Crustaceans and Molluscs play an important role in the oceanic carbon sink.

Explanation:

Carbon sinks can serve to partially offset greenhouse gas emissions. Forests and oceans are both large carbon sinks. Algae is pressurized to bottom of the ocean by long term sequestration. Algae then falls to the bottom of the ocean and TRANSFORMS to fossil fuels.

CO2 is not combustible. creates carbonic acid in the oceans. Reduces seawater pH, carbonate ion concentration, and thus calcium carbonate (needed for shells for marine creatures, contributes to BOTTOM-UP EFFECT)

If helpful, please mark as brainliest! =)

I need help please with both of them

Answers

prevent

location

Explanation

Top is prevent and bottom is achievement

4. Give two examples of how you interact
with the carbon cycle.

Answers

Answer:

in the food chain, plants move carbon from the atmosphere into the biosphere through photosynthesis. ... Animals that eat plants digest the sugar molecules to get energy for their bodies. Respiration, excretion, and decomposition release the carbon back into the atmosphere or soil, continuing the cycle.

Explanation:

Burning fossil fuels, changing land use, using limestone to make concrete. All of these are significant to the carbon cycle.

Begin with the card with the word “Start” on it. Read the question or statement at the bottom of the card and find the matching answer at the top of another card within the set. Continue to navigate through the cards until all cards have been correctly matched and placed in order. Locate the symbol, letter, or number in the top-right corner of each card. Write the correct order of symbols, letters, and/or numbers in the spaces below.

Answers

Answer:

Inner core---Lava---Outer core---Magma---Mantle---Asthenosphere---Oceanic crust---Continental crust---Crust---Lithosphere,

Explanation:

Inner core is the last layer of the earth where lava is present. After that outer core is located where magma is present between outer core and the crust of the earth. After outer core, the layer of mantle is started which extends up to the crust. Asthenosphere is the layer that is present at the upper portion of the mantle and at the top, earth crust is located. Crust and upper portion of the mantle is also known as lithosphere.

PLEASE HELPP

diversity in a habitat represents

A. a group of the same species
B. a group of different species
C. a unicellular organism

Answers

Answer:

B. a group of different species

Explanation:

Diversity means to have variety. (In this case, a variety of species)

Describe what a spreading center is and how a volcano
forms there.

Answers

Explanation:

Spreading center volcanism occurs at the site of mid-oceanic ridges, where two plates diverage from one another. As the plates are pulled apart, hot ashtenophere rise upward to fill voids of the extended lithosphere.

When people answer your question with “hey the answer is in this file here’s the link” is that safe?will it give you a virus?

Answers

Answer:

It depends on the file but I recommend to just not open the file and answer a different question just to be safe.

When you carry an object while walking at constant speed in a straight line, you exert an upward force on the object. Why are you not doing any work on the object?

Answers

Yes you can’t laptop kelelfoc

When you carry an object while walking at constant speed in a straight line, you exert an upward force on the object.

Because any distance is not covered.

As

work done =displacement * force

if displacement is zero work done also be zero.

[tex]\\[/tex]

Which of the following DOES NOT contain a nucleus? *
Prokaryotic cell
O Plant cell
O Animal cell
O Eukaryotic cell

Answers

Answer:

The correct answer is A) prokaryotic cell.

Explanation:

Hope this helped Mark BRAINLIEST!!!

Prokaryotes are cells that do not contain a nucleus, the organelle that contains a cell's genetic material, or other membrane-bound organelles.

Hey Im Chloe, Can you Help me.

Which 2 age classes of deer are most affected by habitat quality?

Answers

Answer:

Additionally, see how survival of younger deer (fawns and yearlings) is reduced. Younger deer are the most sensitive to habitat quality and environmental events, thus reproduction and survival of fawns and yearlings can be a good indicator of habitat quality, or deer density relative to carrying capacity.

Explanation:

Answer:

Probably the small ones and  the older ones

Explanation:

A mutation is least likely to affect a cell when the mutation --

Answers

A mutation is least likely to affect a cell when the mutation is reverses the order of bases in a DNA strand. when the total number of bases in a DNA sequence remain the same. Replaces a base with its complementary base and produces a codon which codes for the same amino acid as the original codon.

A mutation is least likely to affect a cell when the mutation is silent in nature or is not associated with an exon, it is least likely to affect a cell. Any mutation that happens to the introns does not affect the cell's function.

What is the function of cells and mutation?

As genetic materials, nucleic acids encode information about the cell's structure and function, its proteins, receptors, and so on. The mRNA that is formed from the gene has roles in the formation of the receptor, the enzymes, etc., so if any mutation happens to the gene that is in the coding region, then it can show its impact, but if the mutation is of the silent type, then it has no impact on the cell.

Hence, when a mutation is silent in nature or is not associated with an exon, it is least likely to affect a cell. Any mutation that happens to the introns does not affect the cell's function.

Learn more about the mutation here.

https://brainly.com/question/17130462

#SPJ2

At which time points did the scientists take measurements? (Attachment)

Answers

Answer:

(0,0) (2,45) (4,25) (6,20)

Explanation:

3.What is the difference between a dominant and a recessive trait?

Answers

Answer:

Dominant traits are always expressed when the connected allele is dominant, even if only one copy of the dominant trait exists. Recessive traits are expressed only if both the connected alleles are recessive.

Explanation:

Animal cells perform functions using energy that is derived from glucose ( C 6 H 12 O 6 ) . Which molecule is required for animal cells to obtain the MOST energy possible from a molecule of glucose?

Answers

Which molecule is required for animal cells to obtain the MOST energy possible from a molecule of glucose?

Answer is ATP

:)

The diagram above shows how sea breezes form clouds in coastal areas. Which map below shows a cloud pattern that would most likely result from the sea breeze cycle in late afternoon? ​

Answers

Answer: Map H

Explanation:

Sea breeze cycle clouds form in an area where land and a body of water such as an ocean or sea come into contact with each other so maps G and J are not possible as these formed over land and away from any coastlines.

These clouds form over land as it is on land that the sea breeze would be warmed by the land temperature and then rise up. Map F is therefore incorrect as those clouds are over the sea.

Map H is the most plausible answer as the clouds are right over land and the area is next to the ocean.

HELP ASAP!!!!! I’m bein timed :(
Acid deposition kills things ___.
A. very slowly
B. within minutes
C. within hours
D. at an average rate

Answers

I think it would be B. Within minutes

What is the MOST important thing you should always do when you are typing?....

Answers

5 Tips for Improving Your Typing Speed & Accuracy
1.) Use the correct starting position. When practicing your typing skills, it's important to use proper hand placement. ...
2.) Don't look down your hands. Instead of looking down at your hands, focus on your screen. ...
3.) Maintain good posture. ...
4.) Find a comfortable position for your hands. ...
5.) Practice!

What role can the environment play in gene expression?

Answers

Answer:

Internal and external environmental factors, like gender and temperature, influence gene expression. ... Similarly, drugs, chemicals, temperature, and light are among the external environmental factors that can determine which genes are turned on and off, thereby influencing the way an organism develops and functions.

Explanation:

Vascular plants are able to grow taller than nonvascular plants because A. lignin in the cell walls of vascular tissue helps the plant overcome gravity. B. they can live in drier areas than nonvascular plants. C. they rely on osmosis to transport materials throughout the body of the plant. D. there is more sunlight in the areas where vascular plants live.

Answers

Answer:

c

Explanation:

Answer:

A

Explanation:

I got it wrong the first time

symbiosis is a relationship between organisms in which one or both organisms benefit from the relationship? Do you think this is a biotic or abiotic factor?

Answers

This is a biotic factor because living organisms benefit from each other one way or another

En una isla oceánica aislada hay una especie de pájaros, la

mayoría de plumaje gris. Una variedad con manchas blancas

constituye el 4% de la población. Esta característica se debe a un

gene recesivo (s) al del plumaje de color gris entero (S).


¿En qué frecuencia se encuentra el gene s?


a 0.3

b 0.2

c 0.1

d 0.05

Answers

Answer:

La frecuencia del alelo recesivo s es igual a 0.2 (opción b)

Explanation:

Datos disponibles:

Plumaje gris es el fenotipo dominantePlumaje con manchas blancas es el fenotipo recesivoS es el alelo dominante para plumaje griss es el alelo recesivo para plumaje manchadoVariedad manchada representa el 4% de la población.

Si ejemplares con ala manchada y genotipo ss representan el 4% de la población, entonces los restantes 96% corresponden a ejemplares grises homocigotas dominantes SS y heterocigotas Ss. Las frecuencias fenotípicas serán:

Plumaje gris (SS + Ss) = 96% = 0.96Plumaje manchado (ss) = 4% = 0.04

De acuerdo al equilibrio de Hardy-Winberg, la suma de las frecuencias alélicas equivale a 1, y la suma de las frecuencias genotípicas también equivale a 1.

Frecuencia del alelo dominante = pFrecuencia del alelo recesivo = qFrecuencia de genotipo homocigota dominante = p²Frecuencia de genotipo heterocigota = 2xpxqFrecuencia del genotipo homocigota recesivo = q²

Entonces,

p + q = 1p² + 2pq + q² = 1

Si la frecuencia genotípica del homocigota recesivo es 0.04, entonces la raíz cuadrada de ese valor es la frecuencia génica del alelo recesivo. Esto es:

q² = 0.04q = √0.04 = 0.2

A partir de la ecuación p + q = 1, podemos calcular el valor de p.

p + q = 1

p + 0.2 = 1

p = 1 - 0.2

p = 0.8

Entonces la frecuencia genotípica del homocigota dominante es p²

p² = 0.8² = 0.64

Y la frecuencia genotípica del heterocigota es

2pq = 2 x p x q = 2 x 0.8 x 0.2 = 0.32

Para corroborar esto, la suma de todas las frecuencias genotípicas debe dar uno.

0.64 + 0.32 + 0.04 = 1

How can planting a large area of just one variety of plant cause problems for both a farmer and an ecosystem?

Answers

Answer:

Particular plants use particular nutrients from the soil. If you were to consistently plant a large number of plants, of the same species, in the same area. The plant will use all of the nutrients it needs, before the nutrients are replenished. This can cause a decrease in the farmer's yield. By doing this you also create a habbitat for pests. Some pests live off to certain plants, so if your not planting other crops, the pests will thrive. Plating a variety of crops is good because some plants will repel pests from other crops that the pests may be attracted too.

2. Which of the following describes a negative feedback system?
running cattle increase panic within a herd
microphone speaker feedback
feedback that magnifies output
feedback that regulates and stabilizes

Answers

Answer:

Feedback that regulates and stabilizes

Explanation:

Negative feedback systems are ones that try to always maintain homeostasis, or a certain state.

For example, the regulation of body temperature in humans is a negative feedback loop. This is because the body maintains a constant temperature at homeostasis, and will adjust if it is too hot or cold.

Feedback that regulates and stabilizes is a negative feedback system, because it involves regulation/stabilization, similar to the regulation of body temperature.

So, the correct answer is Feedback that regulates and stabilizes

Answer:

feedback that regulates and stabilizes

Explanation:

just took test

Other Questions
Plz help!!!A summer camp counselor wants tocalculate a length, x, in feet, across a pondas represented in the sketch. Segments ACand DE intersect at B, and AEB and CDBhave the same measure. What is the distanceacross the pond? Round to the nearesthundredth. what traditons or belifes brought from spain continue in the united states What are the key agricultural products in Canada and the United States?a.beef, milk, rice, and cornc.milk, beef, eggs, and cornb.rice, corn, eggs, and wheat d.rice, beef, eggs, and corn Elly's hot dog emporium is famous for its chili dogs. Some customers order the hot dogs with hot peppers, while many do not care for that added bit of zest. Elly's latest sales indicate that 30% of the customers ordering her chili dogs order it with hot peppers. Suppose 18 customers are selected at random. What is the probability that between two and six people inclusive want hot peppers? A. Ayusin ang mga ginulong letra upang mabuo ang tamang salita. pagkatapos, gamitin sa sariling pangungusap.1. PASLANGIN- 2. SAMBAHAYAN- 3. KETONG-4. NAHIHINUHA-5. IMORTALIDAD-filipino What is 1+1?Show your work and explain how you got there. Make sure to check your work and round your answer to the tenth.75 point reward. PLS HELP.I WILL MARK BRAINLIEST!! Why is managed floating known as dirty floating? 3When handling and packaging a bullet from a crime scene, investigators must be careful to preserve any trace evidence that might be present, such as paint or fibers, True or false Explain why Athens is considered to be the birthplace of democracy. NEED ASAP BEFORE MARCH 11 Solve x8>4. 20 points and maybe a brainliest A circuit with which components has the highest current with the given voltages?wires, a 9V battery, no resistors wires, a 9V battery, a light bulbwires, a 1.5V battery, no resistorswires, a 1.5V battery, a light bulb Round to the nearest hundredth 94.855 match each sentence with the correct preposition to complete it.-viajamos a santo domingo __ autobs-no tenfold dinero para viajar por avin; __ eso viajo por carro-compramos boletos __ mis padres para is cumpleaos-habl con maura __ ir de vacaciones en septiembre a. por: transportation b. por: reason or motivec. para: purpose or goald. para: recipient Why were there two Anti- Slavery Societies? please help due in 1 hour. This is 7th grade science. & in return Ill help you on something! 15 points What would you need to do to your model to make it look like a true DNA molecule? HELPPPP!!!!! YOULL BE BRAINLIEST AN GET 50 POINTSSHow are the daily exchange rates of national currencies determined?A.They are established by the International Monetary Fund.B.They fluctuate according to changes in the financial markets.C.They are based on the amount of gold held by governments.D.They are approved by World Trade Organization officials. What impact would the story being told from Lucifer's point of view have on the reader?A)The reader would lose the details of the weather.B)The reader would gain insight into why the narrator got lost.C)The reader would lose the specifics of the route they took back to the barn.D)The reader would gain an understanding of Lucifer's feelings about theirjourney