The incorporation of valinomycin, a neutral antibiotic, into a polyvinyl chloride membrane allows for the manufacture of an ion-selective electrode that is highly selective for potassium.
How Valinomycin Ionophores Enter and Transport K+ across Model Lipid Bilayer Membranes?A biomimetic lipid membrane attached to the surface of the gold electrode contained the cyclic peptide valinomycin. The ionophore characteristics of the peptide were investigated using electrochemical impedance spectroscopy, and the conformation and orientation of the antibiotic valinomycin within the membrane were identified using polarization modulation infrared reflection absorption spectroscopy. By forming a complex with potassium ions and an ion pair with a counter anion, valinomycin transports ions across the membrane, and the combination of these two techniques revealed novel information about the ionophore mechanism. The ion pair is located inside the hydrophobic portion of the membrane and makes a little angle of around 22° with the surface normal.To learn more about Valinomycin refer to:
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the spinal cord is made up of
Answer:
spinal cord is made up of = 33bones called vertebrae
In which phase of a sigmoid
growth curve does the
population grow rapidly at
its maximum biotic
potential?
OA. Transitional
B. Plateau
OC. Exponential
D. Lag
The phase in which there is rapid growth at its maximum biotic potential is the exponential phase. Option C
What is the sigmoid growth curve ?The sigmoid growth curve shows the gradual rise in the population of organisms in a habitat under a defined set of conditions. There is an initial exponential growth, followed by a plateau and a lag phase.
The phase in which there is rapid growth at its maximum biotic potential is the exponential phase.
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Hi you can help me? pls i dont know
Answer:
U can search on Internet.
All of these are available on internet
Dna is more resistant to hydrolysis than rna. What feature of dna is responsible for this characteristic?.
The presence of a 2'-hydroxyl group in RNA
Deoxyribose does not include a 2′-hydroxyl group. The reason RNA is more susceptible to hydrolysis is because it has a 2'-hydroxyl group. The 3'-phosphate may be attacked by the 2'-OH, which might cause the phosphodiester link to be hydrolyzed.
Use the meanings of the prefixes and suffixes in the table to form words that will match these definitions
In this question we use the meanings of the prefixes and suffixes in the table to form words that correspond to these definitions.
What is the form words that correspond to these definitions?1. microbiology
2. zoology
3. hydrology
4. aquatic
5.microsheet
6. intracellular
7. microseed
8.phototropic
9. arthrosis
10. unicellular
1) bacteria
2) synthesizes the organic part of the cellular matrix
3) defense phagocytic cell
4)image magnification tool
5) true cells
6) order of genetic descendants
7) process of obtaining energy from plants
8) living beings that produce their own food
With this information, we can conclude that The prefix and suffix are morphemes, also called affixes, which are used with word stems to form a new word that takes on a new meaning.
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If a person is HIV positive, why does he or she need to eat 10% more calories than
do his or her noninfected counterparts?
1. HIV-positive people have a high red blood cell count.
2. HIV-positive people have a low red blood count.
3. HIV-positive people use less energy.
4. HIV-positive people use more energy
HIV-positive people use more energy. Thus, option "D" is correct.
Why HIV-positive people use more energy?These extra calories are needed by people with HIV because their immune system is constantly fighting off the HIV virus.
This is because HIV attempts to evade the infection even as the immune system attempts to eradicate it. The extra calories give the immune cells, which are extra strained, the energy to perform their functions.
Thus, option "D" is correct.
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A high tide will occur A usually only once in a 24-hour period B only in bodies of water close to the moon C on both sides of the earth at the same time D when proximity to the sun makes the days longer
A high tide will occur on both sides of the Earth at the same time, the correct option is C.
What is a high tide?The tidal force causes Earth and its water to bulge out on the sides closest to and farthest from the moon. These water bulges are high tides.
The Moon's gravitational pull is pulling on the Earth and the ocean on the sides facing the Moon. The Earth compensates for the Moon's pulling by bulging out both toward and away from it.
Thus, the correct option is C.
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Select the pituitary hormone that increases the concentration of blood sugar A. cortisol B. growth hormone C. glucagon AND. epinephrine E. insulin
Question 31 of 34
Which situation shows a nonrenewable resource in use?
Answer:
chips made from silicon
Explanation:
Non renewable resources are natural substances that cannot be replenished when used for eg natural gas, coal, petroleum ,fossil fuels etc. Silicon is made when silica is heated with carbon after which the the product is reacted with hydrocarbons to polymerize them. Since the hydrocarbons are made from natural gas, oil ,it is non renewable
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Hello,what is meant by the term Biome as used in ecosystem.
an area classified according to the species that live in that location is known as Biome...
Example= Desert.
Male primates compete through many behaviors for access to mates and to maintain social groupings. These behaviors include:
Male primates compete through infanticide, vocalizing through territorial loud calls, forming alliances behaviors for access to mates and to maintain social groupings.
What is the main reason for sociality among primates?Protection from predators is the main motivation for social behavior. Primates are preyed upon by a variety of predators.
Like humans, many nonhuman primates also socially interact in large groups, grooming, mimicry, cooperative foraging, differentiated affiliative relationships, ritualized courtship and mating behavior, and competitive interactions governed by social dominance are just a few examples of the social behaviors that these nonhuman primates exhibit (10, 11).
Male-female couples, one-male/multiple-female groups, and solitary groups are other types of monkey social organization.
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3. Watson and Crick determined that DNA reproduced by a ______ Watson-Crick_____________________ model, in which the daughter molecules contain _________ of the parent strands and _______ newly synthesized strand.
Watson and Crick determined that DNA reproduced by a Semiconservative Watson-Crick model, in which the daughter molecules contain one of the parent strands and one newly synthesized strand.
According to Watson and Crick's theory, nitrogenous bases on opposing DNA strands form hydrogen bonds that hold the two strands of the double helix together. Each pair of bases forms a flat "rung" on the ladder-like structure of the DNA molecule. Base pairs don't just consist of any arrangement of bases.Watson and Crick proposed that DNA replicates in a "Semi-Conservative" way based on their understanding of the structure of DNA.According to this idea, the DNA double helix's two strands unwind and split, with each "parent" strand acting as a template for the creation of a new "daughter" strand.learn more about Watson-Crick model here: https://brainly.com/question/13244410
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Cells in the thyroid gland produce and secrete thyroid hormone (a polymer of amino acids) that helps to regulate metabolism. What organelle is most likely abundant in cells of the thyroid gland?
Rough Endoplasmic Reticulum (RER) organelle is most probably prevalent in thyroid gland cells.
Rough Endoplasmic Reticulum (RER)RER is a cell organelle that is in charge of protein synthesis as well as the cellular transport of protein-containing vesicles.It consists of cisternae, tubules, and vesicles. The cisternae are comprised of flattened membrane plates that participate in polypeptide processing.Ribosomes, which are protein production sites, wrap the rough endoplasmic reticulum (RER) membranes.The RER produces the majority of enzymes and cell membrane proteins.RER is abundant in organs and cells which release enzymes, including the pancreas.Learn more about rough endoplasmic reticulum (RER) here:
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1. Food
2. Clean water
3. Waste management
Which of the resources above do you believe would be the most difficult to reproduce once it runs out? Why do you think this is?
Waste management would be the most difficult to reproduce once it runs out. Thus, option "C" is the answer.
What is waste management?Waste management~ includes the activities and actions required to manage waste from its inception to its final disposal. This includes the collection, transport, treatment, and disposal of waste, together with monitoring and regulation of the waste management process.
For example, Incineration is the process of burning of solid wastes. It is one of the processes of solid waste management. In this process, combustion of organic and inorganic wastes takes place that leads to the formation of ash, heat and flue gases. Ash is composed of inorganic constituents.
The heat generated during this process can be used to generate electricity. The process is carried out by Incinerators. Incinerators does not completely replace landfilling but it reduces the volume of disposal of wastes.
Thus, option "C" is the answer.
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In the ovary, oocytes are held at metaphase II of meiosis until fertilization. How is this block released
In the ovary, oocytes are held at metaphase II of meiosis until fertilization.This block released, when Progesterone activates c-Mos, which further phosphorylates maturation promotion factor (MPF).
Maturation promoting factor :
One of the major protein kinases that activates and acts as the master regulator for the M-phase transition is Cdk1/cyclin B, also known as maturation promoting factor or MPF. It phosphorylates and activates other downstream protein kinases and directly phosphorylates several structural proteins involved in cellular reorganization.
It also play a major role in chromatin condensation by phosphorylating condensins; a role in NEBD by phosphorylating lamins, nuclear pore complexes, and inner nuclear membrane proteins; a role in fragmentation of the Golgi apparatus by phosphorylating Golgi matrix proteins; and a role in spindle formation by phosphorylating centrosome-associated proteins and MAPs.
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African fish eagles are large raptors that have a wide range across sub-Saharan Africa. Which of these organisms do you think would have a niche similar to that of an African fish eagle?
A- American bald eagle
B- European blue jay
C- White-tailed deer
D- Mountain lion
The organism that would have a niche similar to that of an African fish eagle is the American bald eagle (option A).
What is a niche?A niche refers to a function within an ecological system to which an organism is especially suited.
The niche of an organism distinguishes that organism from other organisms and ensures its adaptation and survival.
According to this question, African fish eagles are large raptors that have a wide range across sub-Saharan Africa. They consume fishes mostly as preys.
This suggests that the organism that would have a niche similar to that of an African fish eagle is another organism with similar characteristics such as the American bald eagle.
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david decided to modulate his blood glucose level by increasing fiberintake. what will be the least effective food
The least effective food would be corn flakes to modulate blood glucose level as it has the least amount of fiber.
Fiber :
Fiber is a type of carbohydrate which the body can’t digest. Although fiber cannot be converted into glucose, the sugar that results from the breakdown of most carbs, fiber travels through the body undigested. In order to control appetite and blood sugar levels, fiber helps the body consume glucose in a more controlled manner.
Constipation, diverticular disease, heart disease, diabetes, and other illnesses all seem to be at a reduced risk when fiber is consumed. In the gut microbiota, fiber has a positive role that may have anti-inflammatory effects that reduce the chronic inflammation linked to various illnesses.
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How many different types of gametes could an organism with the genotype aabbcc produce?.
Answer:
Thanks
Explanation:
The respiratory structure that contracts and relaxes to allow air to flow in and out of the lungs is the: Group of answer choices Larynx Epiglottis Diaphragm Alveoli
The respiratory structure that contracts and relaxes to allow air to flow in and out of the lungs is option(c) i.e, the diaphragm.
What is the diaphragm?The diaphragm, a delicate skeletal muscle that separates the chest from the belly, is located at the base of the chest. When you breathe in, it flattens and shrinks. As a result, the lungs experience a vacuum effect that draws air in. The diaphragm relaxes and the air is forced out of the lungs when you exhale.
signs of diaphragm issues:
Acid reflux, heartburn, coughing, and difficulty swallowing.alterations to skin tone (skin may turn blue).rapid heartbeat, pressure in the chest, and/or breathing difficulties (especially when lying down).Headaches.Hiccups that persist or recur frequently.Patients who need surgery for conditions affecting the chest, including diaphragm issues, are treated by a thoracic surgeon.
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In order to test the implications of early emotional bonding, scientists have done testing on infant emotionality by separating animal babies from their natural mothers, allowing them to be raised by another of their same species. This testing strategy is called:
In order to test the implications of early emotional bonding, scientists have done testing on infant emotionality by separating animal babies from their natural mothers, allowing them to be raised by another of their same species. This testing strategy is called Cross fostering
Transfer of children between mothers is known as cross-fostering. This method is used to distinguish between environmental and genetic impacts on behavior. Transferring some freshly born or hatched young of species A from their mother nest to the nests of species B is the primary process of cross-fostering.A behavior can be proven to have a genetic foundation if cross-fostered offspring have a behavioral attribute that is distinct from that of their foster parents and similar to that of their biological parents. Similarly, environmental variables are proven to be dominating if the offspring exhibits qualities that are different from those of their biological parents and comparable to those of their foster parents.There is frequently a combination of the two, demonstrating both genes. This can be utilized in selective livestock breeding to combine desirable genetic traits like weight, fat distribution, or looks with ones that are influenced by the environment, like temper.learn more about Cross fostering here: https://brainly.com/question/8908083
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Which phase of the menstrual cycle is characterized by the formation of new glands, thickening of the endometrium, and infiltration of blood vessels
The given events occur in the Follicular or proliferative phase of menstrual cycle.
What is proliferative phase?
1st part of the menstrual cycle occuring after menstruation.Occurs between 5-13 days of the cycleDuring this phase, the endometrium thickens due to increasing levels of estrogen from the ovarian follicles.Epithelium proliferates, there is a formation of new endometrial glands and infiltration of blood vessels.Learn more about the menstrual cycle here:
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1. Describe the
overall changes in
matter that occur
during the light-
independent
reactions. What does
the plant start with
and what does it end
with? What is the
source of energy that
powers this change?
Answer:
takes place in the stroma of the chloroplast. Carbon dioxide is modified by series of chemical reactions to form carbohydrates. The energy for these reactions comes from ATP and NADPH generated during the light dependent process.
Explanation:
N/A
what is the produt of meilosis 1
Answer:
Explanation:
Meiosis one results in 2 haploid cells (duplicated), meanwhile meiosis two results in 4 haploid cells that are not doubled.4
When a population grows in proportion to its current size (e.g., bigger populations grow faster), that population is experiencing ________ growth. exponential logistic capacity density-dependent density-independent
The population is experiencing Exponential growth.
Exponential growth is a sample of records that shows a sharper will increase through the years. In finance, compounding creates exponential returns. savings bills with a compounding interest charge can show exponential growth.
The difference between geometric boom and exponential growth is, that geometric increase is discrete (due to the constant ratio) whereas exponential growth is continuous. With the geometric increase, a hard and fast range is increased to x while with an exponential increase, a hard and fast variety is raised to the x.
Exponential population increase is very lots crucial and vital to residing international as we all understand that modern-day populace worldwide is exceeding the wearing ability of earth due to its exponential growth that is ensuing in severe food disaster, water scarcity and economic fall down of the planet earth.
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Which of the following is NOT a step used to perform a scientific inquiry?
c. Developing a hypothesis
a. Determining manipulated and responding
variables
b. Designing an uncontrolled experiment
d. Drawing conclusions
Please select the best answer from the choices provided
A
B
C
D
A newly discovered species of bird is found to only lay a single egg and both parents are necessary to raise the chick to adulthood. What would be the most successful mating strategy for this species
monogamous is the answer.
When birds are vigilant, they rub together the swollen cloaca. The male sperm stored in his cloaca deposits in the female cloaca, where it travels up the chamber and eventually fertilizes the egg.
Most birds mate for only one season and for one reason. However, some species mate for life, while others mate multiple times during the season. Goose, swan, and eagle are known to have only one companion until one of them dies.
Monogamous is a mating system in which one adult male and one adult female are mated. Such a pair of turns can follow a single breeding attempt, breeding season, or many breeding seasons, such as mating mammals, geese, and swans.
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the meninges along with the cerebrospinal fluid that circulates in between each meningeal layer function by
The meninges, along with the cerebrospinal fluid (C.S.F.) that circulates in between each meningeal layer, function by: serving as shock absorbers for the brain and spinal cord.
Meninges :
The meninges are the three membranes which envelop the brain and spinal cord and separate them from the walls of their bony cases (skull and vertebral column). Meninges are classified as either spinal meninges, which encase the spinal cord, or cranial meninges, which surround the brain.
The major function of the meninges is to protect the brain and spinal cord from mechanical stress, to support the blood vessels and to create a continuous canal through which cerebrospinal fluid (CSF) flows. The innermost meningeal layers (arachnoid and pia), collectively known as the leptomeninges, are where the cerebrospinal fluid (CSF) travels.
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The process of heredity discovered by Mendel filled the major gap in Darwin's theory of evolution, by identifying the source of the _________ found among the organisms of all species. This in turn provides the raw material from which natural selection 'selects.'
Answer: mutation...
Explanation: it's most likely mutation since it's what creates adaptation and adaptation helps different creatures in natural selection
Which of the following best describes habituation?
A. A change in response that stems from experience
B. An association between two events in the environment
C. An involuntary response to intermittent stimuli
D. A permanent change in behavior
In the russian federation, which official holds the most power? a. the duma b. the president c. the prime minister d. the monarch please select the best answer from the choices provided a b c d
Answer:
B. The President
Explanation:
Answer:
He is right. Can I have brainlyest
Explanation: