using what you know about the structure of DNA
explain why this placement is crucial to separating the fragments
Answers
Using what you know about the structure of DNA, explain why the placement of positive and negative electrodes during gel electrophoresis is crucial to separating the fragments.
The placement of positive and negative electrodes during gel electrophoresis is crucial to separating the fragments as it allows the movement of charged components of the DNA to the appropriate electrodes.
The deoxyribonucleic acid (DNA) is the nucleic acid in the cells of living organisms which is used to store hereditary information of that organism.
The DNA molecule is made up of two strands (fragments) that curve spirally to form a double helix structure.
The gel electrophoresis is a method that can be used to study DNA through the movement of charged molecules through a gel when electric current passes through it.
The placement of a positive and a negative electrode allows the movement of charged components of the DNA to the appropriate electrodes.
Thus, the phosphate groups on the backbone of DNA molecules which are negatively charged would migrate to the positive electrode of the gel electrophoresis since unlike charges attract.
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Related Questions
During stress, the adrenals release norepinephrine, which activates what? O A. Sympathetic nervous system O B. Parasympathetic nervous system O C. Enteric nervous system O D. Human-Psychological Axis
Answers
During stress, the adrenals release norepinephrine, which activates the sympathetic nervous system. So, option A is accurate.
The sympathetic nervous system is responsible for the body's "fight or flight" response to stress. Activation of the sympathetic nervous system leads to various physiological changes that prepare the body to deal with the perceived threat or stressor.
Norepinephrine acts as a neurotransmitter and hormone, binding to adrenergic receptors in target tissues and organs. Its release from the adrenals during stress stimulates the sympathetic nervous system, leading to increased heart rate, elevated blood pressure, dilation of airways, and enhanced mobilization of energy reserves.
In contrast, the parasympathetic nervous system is responsible for promoting relaxation and restoring normal bodily functions after a stressful event. The enteric nervous system is related to the function of the digestive system. The human-psychological axis refers to the complex interplay between psychological factors and physiological responses but is not a specific physiological system activated by norepinephrine during stress.
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For the strand of DNA listed below. write out the matching RNA strand.
GTAGCGTACAGCIGACGA ACGTGCATTGC GAC G
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students are measuring the rate of enzyme activity. the graph below shows the rate of enzyme action as they increase the temperature. what is one possible reason the enzyme is less effective at high temperature
Answers
Answer:
The heat will cause the enzyme to denature(deform) and the subtrate will no longer fit into the enzyme.
What can your conclude from the graph
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Sheryl is observing ovarian slides taken from a female ape. All the cells show crossover chromosomes. What is this stage?
A.
meiotic prophase I
B.
meiotic prophase II
C.
meiotic metaphase
Answers
The ovarian slides taken from the female ape will show crossover chromosomes in (A) meiotic prophase I.
Crossing over is the event that occurs during Prophase of Meiosis I. During this event, the exchange of genetic material occurs between two non-sister chromatids of two homologous chromosomes. This occurs to produce the recombinants having genotype different from both the parents.
Meiotic Prophase I is the longest and most complex phase of Meiosis. The phase is further divided into stages. These are: Leptotene. Zygotene. Pachytene, Diplotene and Diakinesis. Many of the crucial events of Meiosis like synapsis formation, recombination, etc. occur in this phase.
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This term means that the tissue has a large blood supply flowing through it
A . basal
B. hypoxic
C. connective
D. vascular
Answers
Answer:
c. connective tissue
Explanation:
The largest blood vessels are arteries and veins, which have a thick, tough wall of connective tissue and and many layers of smooth muscle cells
What information does relative dating provide to paleontologists?
Answers
Answer: Age related info
Explanation: It gives idea about the age of fossils and through this one can compare two fossils existense at same time and give their relation
What needs are not being met by a slow-moving or busy line at a school cafeteria? Identify the people, processes, and technologies that play a role in the issue you identified.
Answers
But, when you keep encountering the same Child Nutrition program problems, over and over, day after day, it’s likely more than just a coincidence.
Instead, there probably are bigger issues causing these problems.
The bad news is that it often can be unclear what these bigger issues are, which makes fixing them almost impossible.
The good news? We at Harris School Nutrition Solutions have spent thirty years working with the men and women of Child Nutrition programs all across the U.S., helping to diagnose and solve their School Lunch problems.
So, we figured we’d share with you some of the common school lunch-line challenges we’ve seen over the years, the real issues behind those challenges, and of course the solutions to both.
What factors affect the properties of different elements?.
Answers
The chemical properties of elements are due to the distribution of electrons around the nucleus, especially the outer or valence electrons. It is these electrons that are involved in chemical reactions.
With different amounts of protons, neutrons, and electrons, an atom has different chemical properties, which determines which element it is. The physical properties are interrelated and dependent on the number of electrons in the outermost shell (valence electrons) and are therefore found to vary with time and with changes in atomic number within the group. These properties change regularly as the electronic structure of the element changes.
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The kind of genes an organism possesses is dependent upon the __________
a. type of proteins in the organism’s nuclei
b. sequence of nucleotides in the organism’s DNA
c. number of ribosomes in the organism’s cytoplasm
d. size of the mitochondria in the organism’s cells
Answers
Answer:
B. Sequence of nucleotides in the organism's DNA
Explanation:
The genes within an organism rely on the DNA within those organisms. Different DNA create different genes.
Free po ints
i need help
Answers
2) chloroplast
3) The Stroma
4) electrolysis…?
5) H2O, O2
6) mitochondria
7)?
8)light, water, ADP+P
9) oxygen and ATP
10) electrons, light, NADP+ and H+
11) NADPH
12) 1 Glucose 2 ATP
13) 2 Pyruvate 4 ATP 2 NADH
what is the inactive precursor of pepsin? multiple choice question. dipepsin chymotrypsinogen cholecystokinin pepsinogen
Answers
The inactive precursor of pepsin is pepsinogen. Option D is correct.
Pepsin is a digestive enzyme that helps break down proteins in the stomach. However, before it can become active, it must first be produced as an inactive precursor called pepsinogen. Pepsinogen is produced by chief cells in the stomach lining and then released into the stomach lumen, where it is activated by hydrochloric acid (HCl) that is also produced by the stomach.
Dipepsin is not a real precursor of pepsin and is not involved in the process of pepsin activation. Chymotrypsinogen is the inactive precursor of the digestive enzyme chymotrypsin, which is produced in the pancreas and helps break down proteins in the small intestine. Cholecystokinin is a hormone that is produced by the small intestine and stimulates the release of digestive enzymes from the pancreas, including chymotrypsin.
Hence, D. is the correct option.
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--The given question is incomplete, the complete question is
"What is the inactive precursor of pepsin? multiple choice question. A) dipepsin B) chymotrypsinogen C) cholecystokinin D) pepsinogen."--
The circulation of hot and cold water
Answers
The term _____ means that lit sided of the Moon we see from Earth is getting smaller.
a. waning
b. waxing
c. crescent
d. gibbous
Answers
Answer:
waning
Explanation:
waning means to shrink or get smaller
Scientists use many resources to piece together the history of life on Earth. The fossil record is one source of information that can help scientists understand the way life on Earth has changed over millions of years. What does the fossil record tell us about the history of different species on Earth?
Answers
Answer:
See explanation
Explanation:
Fossil records contain an extensive detail of the evolution of various species on earth which have been preserved in the remains of these organisms or imprints that organisms that existed long ago must have left in sedimentary rocks.
Fossil records basically tell us about the past. They tell us about the species that once existed on earth. They also tell us how long these species existed and how the were related to other species.
This information help us to work out how these organisms lived and the environment where they lived.
Answer: B
Species remain the same over time.
Explanation:
De todos los elementos del cuarto periodo (K hasta Kr) indica:
a) ¿Cuál tiene mayor electronegatividad?
b) ¿Cuál tiene el menor radio atómico?
c) ¿Cuál es el metal más activo?
d) ¿Cuál tiene la mayor energía de ionización?
e) ¿Cuál es el elemento de mayor afinidad electrónica?
Answers
Answer:
El elemento con alta electronegatividad es
Explanation:
El elemento con alta electronegatividad es
De los elementos del grupo principal, el flúor tiene la electronegatividad más alta (EN = 4.0) y el cesio la más baja (EN = 0.79). Esto indica que el flúor tiene una alta tendencia a ganar electrones de otros elementos con electronegatividades más bajas. Podemos usar estos valores para predecir qué sucede cuando ciertos elementos se combinan.
If these patients were treated with antibiotics, what clue would this have given doctors about the
disease's pathogen?
Answers
If patients were treated with antibiotics, then the disease's pathogen is a bacteria capable of infecting human beings.
What are antibiotics?Antibiotics are specific drugs used to treat bacterial infections, which can b used both in humans and animals.
Some of the most commonly used antibiotics include penicillins, cephalosporins, and aminoglycosides.
In conclusion, if patients were treated with antibiotics, then the disease's pathogen is a bacteria capable of infecting human beings.
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Functional groups confer specific chemical properties to the molecules of which they are a part. In this activity, you will identify which compounds exhibit certain chemical properties as well as examples of those six different compounds. Drag one molecule and one chemical property to each bin.
Answers
Given question is incomplete as it lacks the choices for molecules and their properties, however, the missing part is attached with the answer:
Answer:
Molecules and their properties are given as bellow under the type of compound:
Alcohol-
Alcohol is highly polar andmay act as a weak acid
The functional group in alcohol is (OH)
Carboxylic acid-
Carboxylic acid acts as an acid
The function group is (COOH)
Aldehyde-
Aldehyde may be a structural isomer of a ketone
Functional group is (C=O)
Thiol-
Thiol forms disulfide bonds
Function group is (S-H)
Amine:
Amine acts as a base
the functional group is (NH2)
Organic phosphate-
contributes negative charge (PO4)
This functional group is polar
When using the crop as a trigger for scheduling irrigation events (without inducing plant stress), you need to consider... Select one: a. That the use of destructive measures is accurate but will impact on crop yield b. Use a normal camera and calculate how 'green' the crop is c. The use of technology that measures early plant stress symptoms d. Waiting for the crop to wilt
Previous question
Answers
The use of technology that measures early plant stress symptoms is recommended when using the crop as a trigger for scheduling irrigation events without inducing plant stress.
When using the crop as a trigger for scheduling irrigation events (without inducing plant stress), the use of technology that measures early plant stress symptoms should be considered.
This technology will detect early plant stress symptoms, which will help the farmer avoid damaging the crops.The use of technology to monitor plant health and detect early signs of stress is becoming increasingly popular, particularly in crop irrigation.
This technology can be used to detect early signs of stress in crops, allowing farmers to act quickly before the damage is too severe.
Plant stress can have a significant impact on crop yield and quality. This is why it is important to use technology that can accurately detect early plant stress symptoms.
This will enable farmers to take the necessary steps to prevent crop damage and maintain healthy plants, without inducing any stress on the crop.
Therefore, the use of technology that measures early plant stress symptoms is the most accurate and effective way to use the crop as a trigger for scheduling irrigation events.
In conclusion, the use of technology that measures early plant stress symptoms is recommended when using the crop as a trigger for scheduling irrigation events without inducing plant stress.
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After observing tadpoles swimming in the water, you could infer that all amphibians have gills.
A)true
B)false
Answers
Answer:
true
Explanation:
you could infer it, but that doesn't make it true!
How do plants use carbon dioxide? A. To build proteins. B. They store it as fuel in limestone deposits. C. To produce sugars. D. They release it as waste.
Answers
Answer:
C) To produce sugars
Explanation:
Through photosynthesis, plants convert carbon dioxide and water into sugar.
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Describe why enzymes are important in all living organisms?
Answers
Answer:
Enzymes are important because they make the chemical reactions in cells happen quickly.
Enzymes, by speeding up biological reactions, ensure that all necessary activities in a cell can take place simultaneously and prevent one particular activity from overtaking the entire cell or organism. This is possible because enzymes allow chemicals to react more specifically with only certain substances rather than reacting indiscriminately with any number of different substances within cells.
The most famous example of this enzyme effect is when stomach acid reacts with pepsin that turns food into a liquid. The body then uses this liquid for absorption through the intestines where nutrients are then used throughout the body. It's important for people to have enough enzymes in order to digest their food fully however if
Explanation:
suppose a food chain consists of three trophic levels, beginning with primary producers. if the amount of energy fixed by the producers is denoted by x, approximately how much energy will be available to the third trophic level (secondary consumers)?
Answers
According to the question, if a plant fixes X amount of energy, the second trophic level will have access to 10% of X, or 0.1*X, and the third trophic level will have 10% of 0.1*X, or 0.01*X.
Approximately energy will be available to the third trophic level will be 0.01*X.
What phases of an ecosystem's energy flow are there?
The transmission of energy from one organism to another, starting with the autotrophs and rising up the food chain as animals are consumed by one another, is referred to as energy flow. Pyramids of food and energy are another approach to show this kind of chain or just to show the trophic levels.
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write a hypothesis based on observations and scientific principles of the plasma membrane
Answers
Answer:
but you dont have liek a vid or something how do I observate?
Explanation:
What controls this ability to connect through the body movements and facial expressions of others?
Answers
Our volitional centre, the motor cortex, is where we impose specific facial expressions in order to convey the desired message or because the situation requires it.
What is the purpose of the motor cortex?The motor cortex's main job is to provide signals that control how the body moves. It is anterior to the central sulcus and a portion of the frontal lobe. The primary motor cortex, premotor cortex, and supplementary motor area make up this region.What kinds of motions does the motor cortex regulate?The motor cortex generates signals that are particular to movements and sends them to the muscles via spinal cord circuits and motor neurons to regulate motor behaviour. For the execution of movements to be precise, coordinated muscle activation patterns are required.learn more about motor cortex here
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clouds form by the condensation of...
A: Water vapor
B: dust or dirt
C: heat
D: rain
Answers
Answer:
a
Explanation:
clouds form when water rises as water vapor and cools and condenses into clouds
Which type of reproduction involves two parents and results in offspring
Answers
the relationship between reproduction and the nervous system
Answers
Answer: The nervous system plays a crucial role in coordinating and modulating various aspects of reproduction, including sexual behavior, hormone production, and reproductive physiology.
Explanation: The relationship between reproduction and the nervous system can be understood in terms of the control and regulation of reproductive processes by the nervous system.
The nervous system, specifically the brain, plays a crucial role in sexual behavior by combining sensory information, emotions, and mental processes. It regulates the release of hormones and neurotransmitters, which affect sexual arousal, desire, and mating behaviors.
The autonomic nervous system plays a role in reproductive physiology by controlling physiological reactions related to reproduction. The sympathetic division triggers the "fight-or-flight" response, which may momentarily limit reproductive activities during stressful situations. On the other hand, the parasympathetic division promotes relaxation and is involved in sexual desire and erection.
The nervous system is absolutely essential in effectively managing and organizing the complex reproductive processes that are absolutely critical for the survival and perpetuation of a given species.
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Which sentence BEST expresses the central ideas of the passage?
Zebra mussels can adapt to a variety of environments,
O but their ability to adapt to slightly salty water is of
special concern.
O
O
O
Zebra mussels have spread from oceans to lakes,
causing other mussel species to become extinct.
O
Zebra mussels are adaptable mollusks, and they can
survive on land for several days.
O
Zebra mussels have spread rapidly, threatening other
species.
Answers
Zebra mussels are adaptive mollusks that can spend days on land without food.
The ideal answer is C.
Zebra mussels are able to survive in seawater.This bivalve mollusk is only found in the Caspian and Black Sea lagoons and associated inflowing rivers. It can only withstand slightly salty fresh and brackish water for its daily needs.
How do zebra mussels affect the environment?Zebra mussels, like the ones in the photo above, can ruin boat motors, clog water filtration lines, and make beaches unusable. Zebra mussels are a tiny but significant nuisance. This crayfish and other objects can be swiftly encrusted by these mussels.
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Dante loves taking care of the chickens on his farm. He feeds them rice everyday. His Grandma told him that he should feed them corn everyday instead of rice because it will make them grow fatter. He decides to do an experiment to test what type of food will make his chickens fatter. Before the experiment, the chickens weigh an average of 5 pounds. David makes two groups of chickens. He feeds Group A rice everyday, and feeds Group B corn everyday. After one month, David weighs the chickens to see if they gained any weight. Group A weighs an average of 5 pounds and group B weighs an average of 7 pounds.
Answers
Answer:
son grand ma says correct
Explanation:
since according to question the second group is fatter
there fore grandma is correct