What is an antigen?

Answers

Answer 1

Answer:

In immunology, an antigen is a molecule or molecular structure, such as may be present on the outside of a pathogen, that can be bound by an antigen-specific antibody or B-cell antigen receptor. The presence of antigens in the body normally triggers an immune response.


Related Questions

DNA contains the genetic code which is determined by what?

Answers

determines the amino acid sequence of proteins

Amino acid sequence

Name the stages of mitosis!

Answers

Answer:

Today, mitosis is understood to involve five phases, based on the physical state of the chromosomes and spindle. These phases are prophase, prometaphase, metaphase, anaphase, and telophase.

Explanation:

Answer: Mitosis actually occurs in four phases. The phases are called prophase, metaphase, anaphase, and telophase

In relation to natural gas, where is crude oil generally found?


Crude oil is found above natural gas reservoirs.


Crude oil is found next to natural gas reservoirs.


Crude oil is mixed in with natural gas reservoirs.


Crude oil is found below natural gas reservoirs.

Answers

Answer:

*Crude oil is found below natural gas reservoirs.*

Explanation:

the explanation is because well.. that is where it is found.

Answer:

*Crude oil is found below natural gas reservoirs.*

:)

What are the products of photosynthesis? .-.

Answers

Answer:

products of photosynthesis are glucose and oxygen

Members of a population belong to

Answers

Answer:

gene pool? species?

Explanation:

Question is a bit vague hope this helped tho :(

4. Why do koalas smell like cough drops?

Answers

Answer:

idekk

Explanation:

Explanation:

Eucalyptus leaves are very low in calcium, forcing the koalas to go to the ground and eat dirt. They are reported to smell like cough drops because of all that eucalyptus.

PLS ANSWER What happens to glucose and oxygen that is produced by plants during photosynthesis?

Answers

Answer:

During aerobic cellular respiration, glucose reacts with oxygen, forming ATP that can be used by the cell. Carbon dioxide and water are created as byproducts. In cellular respiration, glucose and oxygen react to form ATP. Water and carbon dioxide are released as byproducts.

Explanation:

1. An object that has an equal amount of protons and electrons would be
I
A. electrically charged
B. electric field
C. electric force
D. electrically neutral

Answers

Answer:

the answer is D

Explanation:

sorry if I'm worng....

Yep! The answer would b D

What isn’t an example of Homeostasis

Answers

After plunging into icy-cold water, Gary's core body temperature rapidly drops'

take someone/thing

Explanation:

it means you take someone or take a thing that you can touch to a different country

what are the three domains in the new system of taxonomy.

Answers

Answer:Domain is the highest taxonomic rank in the hierarchical biological classification system, above the kingdom level. There are three domains of life, the Archaea, the Bacteria, and the Eucarya.According to this system, the tree of life consists of three domains: Archaea, Bacteria, and Eukarya. The first two are all prokaryotic microorganisms, or mostly single-celled organisms whose cells have no nucleus. All life that has a cell nucleus and eukaryotic membrane-bound organelles is included in Eukarya.

Explanation:

hope this helps have a great night ❤️❤️❤️❤️

¿ la masa de un reactivo era diferente a la de otro?​

Answers

No but it will edvuelalty happen

when a sperm and egg cell combine, the new cell called a zygote contains:

1: 46 chromosomes
2: 23 pairs
3: 22 chromosomes
4: no pairs

Answers

Answer:

2, 23 pairs

Explanation:

it is honestly the only one that makes sense

A cross between a black cow and a white cow produces a cow that is black and white spotted. If two heterozygous cows are mated, what percentage of their offspring will be spotted? *
10 points
25%
50%
75%
100%

Answers

Answer:

UM  i don't know

Explanation:

Answer:

75%

Explanation:

Can someone please help me .. I WILL MARK U BRAINLIEST !!

Answers

Answer: A. Mosquitoes that were resistant to the insecticide lived and produced offspring.

Explanation: Good luck! :D

Shamus complains that he isn’t feeling well, he thinks a cold/flu is coming on. He takes cold medicine and lays down. In an hour or two, he decides the medication isn’t working, so he takes another dose, thinking more will work better. Shamus takes one more dose of cold medication, 3 hours after his second dose and finally settles down for bed. In the morning, Shamus is found dead in his bed by his roommate.
Answer in terms of livor and rigor, what stages and where in the body is it present

Answers

Answer:

The common cold and the flu may seem very similar at first. They are indeed both respiratory illnesses and can cause similar symptoms. However, different viruses cause these two conditions, and your symptoms will gradually help you differentiate between the two.

Both a cold and the flu share a few common symptoms. People with either illness often experience:

a runny or stuffy nose

sneezing

body aches

general fatigue.

As a rule, flu symptoms are more severe than cold symptoms. Another distinct difference between the two is how serious they are. Colds rarely cause additional health conditions or problems. The flu, however, can lead to sinus and ear infections, pneumonia, and sepsis. To determine whether your symptoms are from a cold or from the flu, you need to see your doctor. Your doctor will run tests that can help determine what’s behind your symptoms. If your doctor diagnoses a cold, you’ll likely only need to treat your symptoms until the virus has had a chance to run its course. These treatments can include using over-the-counter (OTC) cold medications, staying hydrated, and getting plenty of rest.If you have the flu, you may benefit from taking an OTC flu medicine early in the virus’ cycle. Rest and hydration are also very beneficial for people with the flu. Much like the common cold, the flu just needs time to work its way through your body.

Explanation:

How can the amino acid chain of one protein be different from the amino acid chain of another protein?

Answers

When connected together by a series of peptide bonds, amino acids form a polypeptide, another word for protein. The polypeptide will then fold into a specific conformation depending on the interactions (dashed lines) between its amino acid side chains. I hope this answers your question. Enjoy the rest of your day.

Answer:

Proteins

Explanation:

did i choose the right answer in the pic below?

Answers

Answer:

Isnt it 0?

Explanation:

PLEASE PLEASE PLEASE HELP ME WITH THIS!! ONCE I FIGURE OUT HOW I'LL MARK BRAINLIEST (or however you spell it)!!

Answers

Answer:

1st segment: 3rd answer choice

2nd segment: 1st answer choice

3rd segment: 4th answer choice

4th segment: 2nd answer choice

5th segment: 5th answer choice

Bacteria cells can be used to produce insulin for the treatment of diabetes in humans. Which best explains how the bacteria cells are able to produce insulin for humans? (8.L.2.1) *
A. The bacteria have been grown on a petri dish containing insulin.
B. The bacteria have been genetically engineered to contain the DNA needed to produce insulin.
C. The bacteria have been exposed to radioactivity to create mutant strains capable of producing insulin.
D. The bacteria have been grown on a petri dish containing sugar; the bacteria produce insulin in response to the sugar.

Answers

Answer:

Your answer is B), I took this quiz already.

The statement 'bacteria have been genetically engineered to contain the DNA needed to produce insulin'' BEST explains how bacterial cells are able to produce insulin for humans (Option B).

Recombinant DNA (rDNA) refers to the genetic engineering strategies used to create genetically modified organisms capable of expressing exogenous DNA sequences.

The rDNA technologies involve the use of specific proteins that cut (restriction enzymes) and paste (ligase enzymes) target nucleotide (DNA) sequences in order to design organisms containing such sequences.

The recombinant DNA can be expressed into a suitable vector (in this case, bacteria) in order to produce a protein of interest (e.g., insulin).

In conclusion, the statement 'bacteria have been genetically engineered to contain the DNA needed to produce insulin'' BEST explains how bacterial cells are able to produce insulin for humans (Option B).

Learn more in:

https://brainly.com/question/19820456

Which are characteristics of all bacteria? Check all that apply.

They lack a nucleus.
They have a nucleus.
They eat other organisms.
They make their own food.
They are eukaryotes.
They are prokaryot

Answers

They lack nucleus and the are prokaryotes

Some are Autotrophs- not all so both c and d are incorrect as neither applies to all bacteria

Answer:

first & last one :)

Explanation:

How many fundamental laws of inheritance did Gregor Mendel come up with?

Answers

Answer:

The three laws of inheritance proposed by Mendel include: Law of Dominance. Law of Segregation. Law of Independent Assortment.

Explanation:

What should be the genotypes of the parent flowers (P generation) if he wants to ensure that all of the flowers in the F1 generation are tall and yellow?

Answers

Answer:

TTYY x TTYY

Explanation:

HEYYYY CAN SOMEONE HELP ME WOTH THIS WORKSHEET PLZ

Answers

Answer: substitution mutation

Explanation:

What is the correct measurement?

A.36.5
B.33.3
C.32
D.37

Answers

Answer:

the answer is A

Explanation:

Answer:

A 36.5

Explanation:

The little marks go up by one and it only went up one tick past the thirty five and did not past the second tick

The picture shows a temperate forest biome.



The soil in a temperate forest biome is very fertile. Which feature of this biome causes fertile soil?
A
The warm summers dry out the soil, which increases the concentration of nutrients.

B
The leaves fall off the trees each year and decay, which provides nutrients to the soil.

C
The dry climate is ideal for weathering rocks and other materials, and this creates more soil.

D
The animals hibernate each winter, and the soil can make more nutrients wi

Answers

Answer:

B

The leaves fall off the trees each year and decay, which provides nutrients to the soil.

A train rumbles along the tracks at high speed.
After it passes, the rail feels hot. What kind of energy transformation took
place?

Answers

Answer:

Mechanical --> Thermal

Explanation:

Kinetic (speed energy) transformed to thermal (heat energy) energy.

Kinetic to thermal

Mountains: planet earth worksheet answer. There ARE PICTURES INCLUDED

Answers

Answer:

i can't see a single word on that page maybe take another on closer up and ill get back to you

Explanation:

Click the link which illustrates tectonic plates and other features. Use this information to answer the question.

Where are most earthquakes found?

in the middle of continents
under the ocean only
along plate boundaries
along the equator

Answers

Answer:

Along plate boundaries.

Explanation:

They are always moving and when they suddenly slide or move, the ground shudders, making an earthquake.

Answer:third option

Explanation:edge

Enzymes are proteins that impact chemical reactions in cells. Which statement describes the conditions under which enzymes are most effective?​

Answers

Answer: The statement that suggests that the shape of an enzyme determines its function, would be the fact that enzymes are specific to certain substrates, depending on the particular shape of an enzyme it can allow binding to specific substrates and allow for catalyzing that corresponding reaction

Explanation:

Linnaeus's two-word system for naming organisms is called
O taxonomic evolution.
Greek polynomials.
o Genus species.
o binomial nomenclature.

Answers

Answer:

Explanation:

Linnaeus's two-word system for naming organisms is called binomial nomenclature

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