Receptor-mediated endocytosis involves the use of specific proteins in the cell membrane. true false
Answers
Receptor-mediated endocytosis involves the use of specific proteins in the cell membrane is true.
The import of iron into a mammalian cell is another instance of receptor-mediated endocytosis. In general, iron is not imported into the cell by itself, similar to how serum cholesterol is. Instead, it is bonded to the serum protein apotransferrin, which binds two Fe3+ ions.
By the inward budding of the plasma membrane, a process known as receptor-mediated endocytosis (RME), also known as clathrin-mediated endocytosis, cells can absorb metabolites, hormones, proteins, and occasionally viruses (invagination).
This process, which is solely mediated by receptors on the cell surface, creates vesicles containing the ingested chemicals. This procedure only allows chemicals that are receptor-specific to enter the cell.
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Related Questions
T/F In the human heart, the muscular structure of the ventricles enables them to pump blood a greater distance than atria can
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True. In the human heart, the muscular structure of the ventricles enables them to pump blood a greater distance than the atria can.
True. In the human heart, the muscular structure of the ventricles enables them to pump blood a greater distance than the atria can. The atria are smaller and have less muscular walls compared to the ventricles that are larger and have more muscular walls. The left ventricle is responsible for pumping oxygenated blood to the rest of the body, while the right ventricle pumps deoxygenated blood to the lungs for oxygenation. The ventricles are chambers that pump blood through the circulatory system. They act as pumps and distribute blood throughout the body. The ventricles, unlike the atria, must have thicker, more muscular walls to produce the necessary force for blood to circulate throughout the body. In summary, the muscular structure of the ventricles in the human heart enables them to pump blood a greater distance than the atria can. The ventricles have thicker, more muscular walls, which helps produce the necessary force for blood to circulate throughout the body.
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There are five different types of nucleotide bases found in living things. Which
is an accurate comparison of the bases found in robins and the bases found
in sparrows?
A. Sparrows have only one type of base in their cells; robins have
many
B. Robins and sparrows have different types of bases.
C. Robins and sparrows have different arrangements of the bases.
D. Robins and sparrows have the same arrangement of the bases.
Answers
Answer: the answer is C —> AP.EX
Explanation:
The nucleotide bases are the nitrogenous rings that form the backbone of the nucleic acid. Robins and sparrows have the same bases with different arrangements. Thus, option C is correct.
What are nucleotide bases?The nucleotide bases or the nucleobases are the fundamental units that together with the sugar molecule and phosphate make the structure of the DNA or RNA.
There is a total of five nucleotide bases divided into purines and pyrimidines based on their ring structures. The purine consists of adenine and guanine, pyrimidine of cytosine, uracil, and thymine.
The bases are universal in organism containing the DNA or RNA but only differs in their arrangements that result in the development of the various traits and characteristics of the organism.
Therefore, in option C. the bases are arranged differently in species.
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___________ is a protein that stabilizes existing actin micofilaments
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Tropomyosin is a protein that stabilizes existing actin microfilaments.
Tropomyosin is a two-stranded, alpha-helical coiled-coil protein that twists along the actin filament surface, spanning seven actin monomers. It stabilizes existing actin microfilaments by preventing actin polymerization and depolymerization.Tropomyosin is a long, thin, fibrous protein that binds to the actin molecule's grooves.
It stabilizes actin microfilaments by promoting the formation of microfilaments and inhibiting the depolymerization of microfilaments by sterically blocking actin filament association. Tropomyosin's coiled coil binds to a continuous groove on the surface of actin monomers, which serves as a scaffold for troponin to attach to tropomyosin.The tropomyosin molecule stabilizes the actin filament by preventing the myosin head from binding to the actin monomers, causing muscle contraction.
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light reactions and dark reactions take place during photosynthesis. which of these is a product of the dark reactions?
Answers
Glucose is a product of the dark reactions during photosynthesis.
Photosynthesis consists of two stages, the light reactions and the dark reactions (also known as the Calvin cycle). Light reactions occur in the thylakoid membrane and convert light energy into chemical energy, producing ATP and NADPH. Dark reactions take place in the stroma and use the ATP and NADPH generated by the light reactions to fix carbon dioxide and create glucose, a sugar molecule used for energy storage and structural support in plants.
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The immune system has both specific and nonspecific immune responses against pathogens. Which scenario describes a specific immune response?
the body using intact skin to keep out all pathogens
o antibodies being produced to fight off a pathogen inside the body
macrophages engulfing an unknown virus that has entered the body
inflammation and redness occurring at the site of a bacterial infection
Answers
Answer:
antibodies being produced to fight off a pathogen inside the body
Explanation:
Specific immune responses, also known as the adaptive immune system are ways the body fights against pathogens. The body is able to identify cells that are unique to it. When pathogens bearing an unknown identity enter the body, antibodies are released to attack the antigens on the surface of these pathogens.
The body usually develops this immunity after a previous attack by the pathogen. Lymphocytes known as the B and T cells are released by the immune system t engulf the pathogens.
Which best describes the process of peer review?
A. Scientists allow other people to draw the conclusions from their
work.
B. Scientists allow other people to choose their control groups.
C. Scientists examine each other's work to make sure it is not biased
or unreliable.
D. Scientists prevent other scientists from seeing their experimental
data.
SUBMIT
Answers
Scientists examine each other's work to make sure it is not biased or unreliable this describes the process of peer review. The correct option is C.
What is a peer review?The peer-review process is used to verify academic scientific quality by confining an author's published work, research, or ideas to the scrutiny of others who are experts in the same field (peers).
Scientists examine each other's work to make sure it is not biased or unreliable this describes the process of peer review.
Thus, the correct option is C.
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The graded potentials produced at the part of the neuron labeled ________, are generated by ion flow through _______ channels.
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The graded potentials produced at the part of the neuron labeled dendrites are generated by ion flow through ligand-gated or mechanically-gated channels.
Graded potentials are local changes in membrane potential that occur in response to synaptic input or sensory stimulation. These potentials play a crucial role in integrating and transmitting signals within the neuron.
The dendrites are the branching structures that receive incoming signals from other neurons or sensory receptors. When neurotransmitters or mechanical stimuli bind to specific receptors on the dendrites, ligand-gated or mechanically-gated ion channels open.
Ligand-gated channels are activated by the binding of neurotransmitters released from neighboring neurons. The binding of neurotransmitters causes a conformational change in the receptor, leading to the opening of ion channels and the influx or efflux of ions. This generates a graded potential that can be either depolarizing (excitatory) or hyperpolarizing (inhibitory), depending on the specific ions involved.
Mechanically-gated channels, on the other hand, are activated by physical deformation of the membrane, such as pressure or stretch. These channels open or close in response to mechanical stimuli, allowing ion flow across the membrane and generating graded potentials.
Overall, the dendrites play a crucial role in receiving and integrating incoming signals through the generation of graded potentials. The activation of ligand-gated or mechanically-gated ion channels in the dendrites allows for the flow of ions, which initiates local changes in membrane potential and facilitates signal transmission within the neuron.
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the major changes that occurred during earth’s history, such as the origin of new species, evolutionary trends, adaptive radiations, and mass extinctions, are collectively referred to as what?
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The major changes that have occurred during Earth's history, such as the origin of new species, evolutionary trends, adaptive radiations, and mass extinctions, are collectively referred to as the evolutionary history of life on Earth.
Evolutionary history is the story of how different organisms evolved over time, leading to the current diversity of life on our planet. The Earth's history is divided into different geological periods, and each period is characterized by unique evolutionary events.
There have been many major changes throughout Earth's history, and some of the most significant include the Cambrian explosion, the emergence of vertebrates, the development of flowering plants, and the extinction of the dinosaurs.
These events have shaped the evolution of life on our planet and continue to influence it to this day.In conclusion, the evolutionary history of life on Earth refers to the major changes that have occurred throughout our planet's history, including the origin of new species, evolutionary trends, adaptive radiations, and mass extinctions. Understanding this history is crucial to gaining insight into the diversity of life on our planet and the processes that have shaped it.
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Analysis the picture
Answers
Answer:
the picture is not that clear
sorry
I will mark BRAINLIEST!!! Just answer this question, please!!!
The NADH produced in glycolysis will be used in which step of cellular respiration?
1) Electron transport chain
2) Citric acid cycle
3) Krebs cycle
4) Photosynthesis
Answers
Creating a formula by _____ to the specific cells that are to be part of the formula is more accurate than typing the cell references.
Answers
Creating a formula by pointing to the specific cells that are to be part of the formula is more accurate than typing the cell references.
This is further explained below.
What are cell references?Generally, When working with Excel, you may refer to the value of a separate cell or cell range on the same worksheet or on a different worksheet inside the same spreadsheet by using something called a cell reference.
In a formula, a cell reference may stand in for a variable if the need arises.
In conclusion, Rather than manually putting in the cell references, it is more accurate to create a formula by pointing to the individual cells that need to be included in the formula.
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How might biodiversity be important to an ecosystem’s health and stability?
Answers
Ecosystems with higher biodiversity are more stable as they can easily adjust to changes. They also have fewer species that depend on just one another for food, shelter and maintaining their environment
CAN U GUYS HELP ME!! PLEASE FIND TRNA AND THE MESSAGE IM CONFUSED
Answers
Onepage review on why understanding gas and vapors in a work setting is important and what we can do in our workplace to prevent accidents with gases and vapors.
Answers
Understanding gas and vapours in a work setting is incredibly important for workplace safety. Gas and vapours can contain noxious substances that, if exposed to, can lead to serious injury or health implications.
In order to prevent such accidents, employers must perform risk assessments in order to assess and identify any areas of risk and put in place control measures to limit them. If gas and vapours are used onsite, then suitable ventilation and extraction systems should be in place.
Employers should also ensure that their staff are aware of the potential risks associated with such substances and provide adequate training and instruction in how to work safely. Finally, employers should also check that any necessary personal protective equipment is provided and communications are in place to be able to notify relevant emergancy responders in case of an accident.
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Inherited genetic variations are caused and influenced by environmental factors only. Factors like an organism’s habitat conditions and behavior can affect variation within a population. PLEASE EXPLAIN HOW ENVIRONMENTAL FACTORS EFFECT GENETIC VARIATION! WILL MARK BRAINLIEST!!
Answers
Answer:
Genetic variation among plant populations often occurs along different climatic gradients, such as temperature and precipitation gradients. Environmental factors are often responsible for the patterns of genetic structure observed at small spatial scales
Explanation:
This questions has two parts
35 points
Answers
Part A
Answer: (A) Candida Albicans and Saccharomyces Cerevisiae
Explanation: They have the smallest difference in Cytochrome C
Part B
Answer: (B) The two species have high molecular homology
Explanation: Molecular homology means resemblances between species on the molecular level. Since the two species from the answer in Part A have the smallest difference in Cytochrome C it means they have high molecular similarities; this is due to evolving from the same common ancestor.
(A) is not the right answer because the fungi in the table might all look similar but have different or similar genetic blueprints.(C) is not the right answer because fungi can reproduce sexually or asexually, so reproduction cannot help with determining relatedness.(D) is not the right answer because if the two species from the answer in Part A are closely related because they are both fungi, the answer for Part A should be all of the options.HELP........................................
Answers
Answer:
D. If an earthworm is given a choice, it will move toward darkness rather than light.
Explanation:
A hypothesis must be a declarative statement that can be tested. That is the only one that follows the guidelines for a good hypothesis.
Explain the negative impact of human activity on the environment. Be sure to consider:
pollution by agricultural practices such as use of chemical fertilizers;
products of industrialization and improper garbage disposal;
impact on eco-tourism;
loss of habitat, species;
impact on human health.
Answers
Answer:The negitive impact on the envirement that is caused by humans is due to human expansion, reproduction, war and economics
Explanation: As humans explore they need to settle in new areas and find a way to settle down and reproduce to create a settlement and a home for the colonie, but in doing so there taking resources and land that where habibtats are now destroyed.
HELP PLS HURRY i really i need this done
Answers
Write a ""lifeline"" of a robin over the first year of its life. Include important events.
Answers
Answer: I hope that this helps you please give me brainiest
Robins are born in the spring or summer and are mature birds and ready to breed in the following spring or summer. They do not mate for life. Pairs usually remain together during an entire breeding season, which can involve two or three nestlings.
Since leaving the nest (fledgling), it takes another 10-15 days for babies to become good fliers and individual birds. The parents continue to feed their young throughout this time.
Explanation:
How long do robins live?
A. Most robins die their first year. But the lifespan goes up dramatically for the ones that survive that critical time, because they've learned so many important life skills. Of those that survive their first year, most wild robins live to be about 5 or 6. As of February, 2001, the longest-living banded wild robin ever recorded had survived 13 years and 11 months, according to the Bird Banding Laboratory at the Patuxent Wildlife Research Center. In captivity, robins have survived longer than 17 years.
Q. Do robins mate for life?
A. No, robins do not mate for life. Pairs usually remain together during an entire breeding season, which can involve two or three nestings. However, in spring, sometimes a male and female who mated the previous year will both return to the same territory and end up together for another year. This happens most frequently when they were successful raising babies the previous year.
Q. How long do robins stay in the egg? (egg stage)
A. About 12-14 days after the last egg was laid. (Robins lay one egg per day, for a total of 5-6 eggs in a clutch.)
Q. How long do robin babies stay in the nest (nestling stage)?
A. Baby robins jump from their nest when they are about 13 days old (but the range is 9 - 16 days old).
Q. When do young robins learn to fly? (fledgling stage)
A. After leaving the nest (fledging), it takes another 10-15 days for babies to become strong fliers and independent birds.
Q. How long does it take a robin to go from egg to independence?
A. Here is a summary:
Life Cycle Stage # Days
Egg 12 - 14
Nestling 9 - 16
Fledgling 10 - 15
Total 31 - 45
Q. How old are robins when they mate?
A. Almost one year old. Robins are mature adults and ready to breed in the spring that follows the spring or summer they were born.
Viruses are particles that Select one: a. contain DNA or RNA which can be injected into a cell. b. have an exterior coat composed of protein. c. can contain an enzyme which catalyzes the reaction to make DNA from the viral RNA. d. All of these answer choices are correct.
Answers
Answer:
d. All of these answer choices are correct.
Explanation:
Viruses have an exterior coat composed of protein, the capsid. Inside of it, there is DNA or RNA. When the virus has RNA, it has an enzyme that allows the synthesis of DNA from RNA. This type of virus is a retrovirus since it does the inverse process, from RNA, it gives DNA and not the other way round.
First, as the capsid has proteins, it attaches to a receptor in the cell's membrane. Then the DNA or ARN enters the cell taking it as a host since it uses the cell's structure to replicate the viral DNA and make viral proteins and DNA that then it assembles to form new viruses that will be released to infect other cells.
Why are stems so controversial
Answers
The stem cells are so controversial because it involves the destruction of the human embryo as well as its life for just research purposes only.
What are Stem cells?Stem cells may be defined as cells that are totipotent and pluripotent in nature and have the prospect to mature into many diverse types of cells in the body.
Embryonic stem cells are the type that is considered most unethical and controversial. The stem cell debate is the contemplation of the moralities of research involving the maturation and use of human embryos for only research methodologies.
Destruction of such important life for our own benefit or research purposes makes the podium controversial.
Therefore, it is well described above.
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Which of the following provides evidence to support the continental drift theory?
Mapping of the ocean floor using sonar shows plates moving apart
Shape of continents look like puzzle pieces that can fit into one another
Spreading apart of the seafloor at the divergent boundary of the mid-ocean ridge
Symmetrical pattern of magnetic stripes in the crust on both sides of the mid-ocean ridge
Answers
Answer:
shapes of the continents look like puzzle pieces that can fit into one another
Answer:
A
Explanation:
Explain the water cycle step by step in your own words
Answers
Answer:
The Water Cycle Step 1. The sun happens to be the driving force of the water cycle. It heats up the water in seas, rivers, lakes and... Step 2. This water vapor then comes in contact with air currents, which take it higher into the atmosphere. After... Step 3. These clouds move all round the globe ...
Explanation:
Describe the role of carbon in biological systems
Answers
Carbon is an important element that is necessary for the development and growth of the living organisms. It makes up the structure of living organisms.
Carbon having four valence electrons in it's outermost shell is able to bind with oxygen, nitrogen, and hydrogen to form biomolecules like carbohydrates, lipids, proteins, and nucleic acids. These biomolecules are involved in various processes in the living organisms like defense, reproduction, growth, photosynthesis, respiration, and others. These biomolecules are necessary for the proper functioning, growth, metabolism, and development of living organisms. Conclusion: Hence, carbon acts as an integral element that is necessary for structure and function of the organisms.Learn more about carbon:
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5. In a rainforest, giant trees normally live for hundreds of
years. However, when they do die and fall to the ground,
hundreds of seedlings will compete to take its place. What
adaptation is most necessary for a young tree to mature in
this environment?
A. The ability to grow vertically at a rapid rate
B. The ability to establish a deep root system while
growing at a slow and steady rate
C. The ability to retain water to survive in drought
D. The ability to grow narrow, small leaves
Answers
Answer:
b
Explanation:
i think im right
complementary strand of DNA?
DNA Strand 1: AATCGGTAC
Answers
Answer:
TTAGCCATG
Explanation:
Deoxyribonucleic acid (DNA) is a double helix molecule made up of two complementary polynucleotide strands oriented antiparallel to each other. Each nucleotide in both DNA strands is composed of a five-carbon sugar (deoxyribose), a phosphate group and a nitrogenous base. In DNA, there are four types of nitrogenous bases: Thymine, Guanine, Adenine and Cytosine (in RNA, Uracil replace Thymine). According to the base-pairing rules, Adenine always pairs with Thymine through two hydrogen bonds, whereas Guanine always pairs with Cytosine through three hydrogen bonds.
A rock contains 100 grams of Potassium 40 and 300 grams of Argon 40. How old
is the rock?
Answers
Answer:
The rock's age is approximately
2.6 billion years.
Explanation:
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How many possible connections are there among the neurons of the brain?
(A) about 500 million
(B) about 500 trillion
(C) about 5 billion
(D) about 50 trillion.
Answers
The number of possible connections among the neurons of the brain is about 500 trillion (B).
Neurons are specialized cells that process and transmit information in the brain. Each neuron is connected to other neurons through synapses, which are the sites of communication between neurons. The number of possible connections between neurons in the brain is incredibly large.
According to estimates, the human brain has about 100 billion neurons, and each neuron can form connections with up to 10,000 other neurons. This means that the total number of possible connections in the brain is about 1 quadrillion (10^15).
However, not all possible connections are formed in the brain, and the actual number of connections is estimated to be around 150 trillion (10^14). Therefore, the correct answer to the question is an option (B) about 500 trillion.
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The diagram shows changes of state between solid, liquid, and gas. The atoms of a substance lose energy during a change of state. Before the change, the atoms are close together but are able to slide past one another. A diagram has a triangle at center with gas on top, liquid on bottom right, solid on bottom left. An arrow from gas to liquid is labeled O, and an arrow from liquid to gas is labeled N. An arrow from solid to liquid is labeled P, and an arrow from liquid to solid is labeled Q. An arrow from solid to gas is labeled L, and an arrow from gas to solid is labeled M. Which arrow represents the change of state described above? M N
Answers
Despite being closely spaced, liquid atoms can still slide past one another. They lose energy after the transition since solids don't move; they only vibrate, hence the right response is Q.
What is change of state?The physical conversion of matter from one phase to another, such as from a solid to a liquid, liquid to a gas, or vice versa, is referred to as a change of state, sometimes known as a phase transition.
These modifications take place when heat is applied to or removed from a substance, changing the way its molecules are arranged and changing the substance's phase.
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