Which of the following are functions related to the expression of MHC molecules?
a. To display self-peptides to test developing T cells for autoreactivity
b. To display self-peptides to demonstrate cell health
c. To display self-peptides to maintain self-tolerances
d. To display foreign peptides
e. All of the answers are correct.
Answer:
e. All of the answers are correct.
Explanation:
The major histocompatibility complex (MHC) is a locus that contains several polymorphic genes. These genes are known to encode different components of the immune system, especially cell-surface proteins which present antigens to the T cell receptors during adaptive immune responses. The MHC genes are classified into Class I, Class II and Class III:
1- MHC class I genes encode cell surface molecules that present peptides (antigens) to cytotoxic T lymphocytes (i.e., killer T cells)
2- MHC class II genes encode cell surface molecules that present antigens to CD4+ T cells
3- MHC class III genes encode proteins that are not involved in antigen presentation (i.e., components of the complement cascade, cytokines, etc)
which is a characteristic of pseudoscience
resistance to change
continually changing
involves a step-by-step method
updated by new technology
Answer:
a
Explanation:
i took the test
What human activity provides a reasonable analogy for the movement of kinesin molecules along microtubules?a. running on a treadmill.b. climbing a rope hand over hand.c. shooting a fire hose at a beach ball.d. being one of many rowers in a boat .
Answer:
The correct answer is - option. b climbing a rope hand over hand is correct
Explanation:
The movement of the kinesin molecules led by the head of one kinesin followed by the second one after another same as one hand moves on the rope at a time and followed by the other hand during climbing the rope.
The movement of the kinesin microfilament is due to the increased affinity by ATP of the head of the kinesin for the microtubule. However, the hydrolysis of ATP decreases its affinity so it slides or moves to the plus end.
Helppppp I have one hour until it’s due!!!!
What compound do plants get from their roots for photosynthesis?
options:✨✨✨
Carbon Dioxide
Oxygen
Glucose
Water
report about Reduce, Reuse, Recycle and example
Answer:
reduce is reducing the amount of plastic we use reuse is reusing a plastic item for something else recycle is convert into a new material hope this helps!
Explanation:
Which list of countries arranged least to most in terms of how much of their income they spent on food
1China Canada Poland Kenya
2Poland China Kenya Canada
3 Canada Kenya Poland China
4 Canada Poland China Kenya
Answer:
is number three
Explanation:
In the human body, sodium—a component of salt—balances fluids, such as water, in the body. Explain how the onion experiment showed this. 20 BRAINLY POINTS PLZ HELP
Answer:
The salt worked like sodium on the onion.
Explanation:
how to get sick with fever fast
Answer: Over exhaust your self and stay up for two days no sleep.
what makes terrestrial different
Answer:
Terrestrial planets are Earth-like planets made up of rocks or metals with a hard surface. Terrestrial planets also have a molten heavy-metal core, few moons and topological features such as valleys, volcanoes and craters.
Explanation:
Is that what your talking about?
Which correctly describes crossing over?
a.)the process whereby nonsister chromatids exchange genetic material
b.)the process whereby homologous chromosomes are pulled to opposite poles of the cell
c.)the process whereby sister chromatids are pulled to opposite poles of the cell
d.)the process whereby homologous chromosome pairs align randomly along the metaphase plate
A cold front often brings intense weather changes such as thunderstorms while a warm front often brings light rain or drizzle. Why is this the case?
Answer:
The front term is associated with an area where two air masses met and as it is usually the condition with heavy rain, fierce wind, snow and other violent weather like a war situation. The front could be warm, cold, occluded or stationary depends on the type of weather.
The cold front is associated with lots of thunderstorms and other intense weather while the warm front changes with drizzly rain and warmer weather due to the fact that in a cold front, replacement of warm air by the cold air is faster while in a warm front, the replacement of cold air by warm air is gradual
As shown in the diagram above, at several locations warm, less dense water cools
Please select the word from the list that best fits the definition
minerals mined for titanium
usefulness, profitability
lightness, durability
ilmenite, rutile
automobiles, aircraft
beauty, rarity
Mark this and retum
Answer:
e
Explanation:
im just built different
Answer:
E
Explanation:
Identify the parts of the DNA molecule below
Explanation:
where is question or diagram
Which statement correctly distinguishes the functions of proteins from other types of biomolecules?
Answer:
This question is incomplete
Explanation:
This question is incomplete. However, the four major biomolecules have the following different functions
1) Nucleic acid (as in DNA and RNA): They are a sequence of nucleotides that store organism's genetic code. This nucleotide sequence in turn determines an organism's protein sequence.
2) Carbohydrates: They are important structural components of various "compositions" in an organism (such as the cellulose in cell wall and ribose in nucleotide). They also serve as energy sources for the body.
3) Lipids: They also serve as energy sources and are part of membrane composition (as in the case of the phospholipid cell membrane).
4) Proteins: They are major structural elements of cells. They serve as enzymes in many biological activity (such as hexokinase in glycolysis and DNA polymerase in DNA replication). They also form hormones (such as insulin) and antibodies (such as the Immunoglobulins).
Type 1 diabetes is caused by destruction of beta cells in the pancreas that produce insulin. Which of the following best explains why a person with this disease needs medication?
a. Medication is needed to act as a signaling molecule to activate the signal transduction pathway.
b. Medication is needed to allow alternate signaling transduction pathways to control glucose levels.
c. Medication is needed to open channels to allow signaling molecules to enter pancreatic cells.
d. Medication is needed to serve as second messengers to regulate glucose uptake by cells.
Answer:
the answer is a. Medication is needed to act as a signaling molecule to activate the signal transduction pathway.
i took the quiz
Medication is needed to act as a signaling molecule to activate the signal transduction pathway. So, the correct option is (A).
What is Type 1 Diabetes?Type 1 diabetes also called insulin-dependent or juvenile diabetes which is usually develops in children, adolescents, and young adults, but it can occur at any age. A condition in which the immune system destroys the insulin-producing cells in the pancreas. These are called beta cells.
There are several signs of type 1 Diabetes which include:
Extreme thirstIncreased hungerDry mouthUpset stomach and vomitingFrequent urinationWhen a person suffering from this disease needs medication which is need to act as signaling molecule to activate the signal transduction pathway. Type 1 Diabetes is characterized by a progressive loss of insulin-producing β-cells in the islets of the pancreas. Immune destruction of β-cells is partly mediated by high levels of pro-inflammatory cytokines.
Thus, medication is needed to act as a signaling molecule to activate the signal transduction pathway. So, the correct option is (A).
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Which of these statements about the world's food supply is most accurate? A. Overnutrition is greater world problem than undernutrition. B. Food is more expensive than in the pre-1970 world. C. Some food is diverted for use as fuel. D. Less food per person is produced today than in the past.
Answer:
C. some food is diverted for use of fuel
How can larger carbon-based molecules and amino acids be a result of chemical reactions between sugar molecules and other atoms?
Which is the overall purpose of the excretory system? extracting energy from food removing wastes from the body moving nutrients through the body gathering information
Answer:
removing wastes from the body
Explanation:
Excretory system is one of the organ systems in our body. The excretory system encompasses all the organs in the body associated with the function of REMOVING WASTES FROM THE BODY, which represents the primary function of the excretory system.
These organs in the excretory system which include; kidney, skin, lungs etc. all functions to remove one waste or the other. For example, the kidney removes URINE, the skin removes SWEAT, the lungs remove C02.
Answer:
removing wastes from the body
Explanation:
edge 2021
Sucrose is an organic compound made by plants for quick energy.
What type of organic compound is sucrose?
(a.protein
(b.carbohydrate
(c.lipid
(d.nucleic acid
Help please idk the answer
Answer:
whats the rest of the question?
Explanation:
Why do you think prokaryotic cells do not have all the organelles that eukaryotic cells do? What does this tell you about prokaryotic cells?
Answer:
Explanation:
A prokaryotic cell is a type of cell that does not have a true nucleus or membrane-bound organelles. Organisms within the domains Bacteria and Archaea are based on the prokaryotic cell, while all other forms of life are eukaryotic
A prokaryotic is a primitive cell that lacks organelles, unlike the eukaryotic cells, and are simple organisms.
What are prokaryotes?Prokaryotes are organisms that are simple and evolved before the complex eukaryote. They include bacteria and archaea that are simple and lack organelles that are found in eukaryotes.
They do not have a nucleus and rather have their genetic material disposed of as nucleoids in the center of the cell that undergoes the simple process of the central dogma.
The simple cellular processes and reproductive methods are the reason they lack many organelles. This tells that prokaryotes are simple and primitive types of cells.
Therefore, prokaryotes lack a distinct nucleus.
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What are the 3 elements that cause seasons?
what is mean by exc
Answer:
QEMM Exclude file for Optimize (do not process the data) Computing » File Extensions.
Economy Question:
Which situation best illustrates globalization's effect on an economy?
A. An Italian fashion company has its clothes made in Taiwan.
B. A Swedish computer company develops a popular new laptop.
C. An Israeli baker sells cakes to local families for many special occasions.
D. A Kenyan construction worker builds a skyscraper in his home city.
Answer:
A. An Italian fashion company has its clothes made in Taiwan
Explanation:
Globalization is when a company starts having influence in other countries. This is bet seen in A. The fashion company is able to sell it's clothes all over the world. But, it's based in Italy. That is already globalization. But, on top of that, to have it made in Taiwan if even more foreign influence.
The situation best illustrates globalization's effect on an economy is An Italian fashion company has its clothes made in Taiwan. The correct option is A.
What is globalization?Globalization means when the economy or trade is happening and connects with the world. The trade that makes the world interconnected, then it is called globalization.
An Italian company when established its fashion company in Taiwan, creates a relationship between these two countries, and increases globalization.
All other options show trading or manufacturing in the local markets, within the states or countries, doesn't match with the term globalization.
Thus, the correct option is A. An Italian fashion company has its clothes made in Taiwan.
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help idk this answer
Answer:
d
Explanation:
How are coral reefs similar to tropical rainforests?
Ó Both are home to just a few types of rare animals.
Both can easily be restored if they are destroyed.
Both support a huge quantity and variety of organisms.
O Both are found in all types of climates around the world.
Answer:
Both support a huge quantity and variety of organisms.
Explanation:
what is the lagging strand synthesized by?
Answer: Unlike leading strands, lagging strands are synthesized as discrete short DNA fragments, termed 'Okazaki fragments' which are later joined to form continuous duplex DNA. Synthesis of an Okazaki fragment begins with a primer RNA-DNA made by polymerase (Pol) α-primase.
Explanation:
10. Explain the difference between Biological & Cultural Carrying Capacity.
Answer:
I do not know
Explanation:
Answer: Biological carrying capacity describes which species are able to coexist in a niche. Cultural carrying capacity describes the ability of a human population to thrive and create culture in meager circumstances.
Explanation: