Answers
Answer:
The underlying principle of SEC is that particles of different sizes elute (filter) through a stationary phase at different rates. This results in the separation of a solution of particles based on size.
hope it helped
Size exclusion chromatography (SEC) separates molecules based on their size by filtration through a gel.
What is size exclusion chromatography?
Size exclusion chromatography (SEC) splits molecules based on their size by filtration via a gel. The gel consists of spherical beads including pores of specific size distribution. Separation happens when molecules of various sizes exist included or excluded from the pores within the matrix.
Size exclusion chromatography exists named gel filtration chromatography because the gel effectively allows for the filtering of molecules from a sample based on molecular size. However, unlike other methods, the larger molecules elute first.
Size-exclusion chromatography (SEC), also understood as molecular sieve chromatography, exists a chromatographic procedure in which molecules in solution exist separated by their size, and in some cases molecular weight. It exists usually applied to large molecules or macro molecular complexes such as proteins and industrial polymers.
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Related Questions
13: Mycobacteria are stained with
a. Gram's staining
b. Simple staining
c. Both a and b
6. Ziehl - Neelsen's staining
Answers
Answer:
d. Ziehl - Neelsen's staining
Explanation:
The mycobacteria is stained with the Ziehl - Neelsen's staining. Hence, option (d) is the correct answer.
If 622 water molecules were removed during the synthesis of a specific polysaccharide, how many monomers were joined together to make this molecule? need help please and thank you
Answers
Answer:
623 monomers
Explanation:
In a dehydration synthesis reaction, one water molecule is removed for every bond that is created between 2 monomers.
Linking 3 monomers together would remove 2 water molecules.
Following this pattern, the number of water molecules removed will always be one less than the number of monomers that were joined together.
So, if 622 water molecules were removed, then 623 monomers were joined together.
The answer is 623 monomers.
Which of the following could be a characteristic of the fossil that is most closely related to humans? S-shaped back bo...
Answers
Answer: S-shaped back bo
Explanation: That was the only choice
Answer:
S-shaped back bone
Explanation:
pls mark as brainlists
Explain the processes that occur in the nucleus.
Answers
Answer:
A nuclear reactor is driven by the splitting of atoms, a process called fission, where a particle (a 'neutron') is fired at an atom, which then fissions into two smaller atoms and some additional neutrons. ... The fissioning of atoms in the chain reaction also releases a large amount of energy as heat.
define cell and atom
Answers
Answer:
hope it is helpful to you
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Explain why it is not advisable for two sickle cell carriers to marry.
Answers
Answer:
it results in pleiotropic effect and caused death of an offspring.
All of the following factors contribute to the differences in complex trait risk predictions between different laboratories, EXCEPT ____________. differing methods of combining risk from multiple genetic variants selection of different genetic variants for risk determination different assessments of environmental factors genotyping of different variants
Answers
Answer:
different assessments of environmental factors
Explanation:
In humans, for predicting the future phenotype of any individual, the PSR is used.
A trait may be defined as the state of a character that is a distinct variation of the phenotypic characteristic of any organism.
The following factors contributes to the differences in the complex trait risk predictions in the different laboratories :
-- differing methods of the combining risk from the multiple genetic variants.
-- genotyping of the different variants.
-- selection of the different genetic variants for such risk determination.
Thus the factor which does not contribute is :
"different assessments of the environmental factors."
2. Explain two different ways that you could classify the following
items: banana, lemon, sandwich, milk, orange, meatball, salad.
Answers
Answer:
Two different ways that you could classify the following items: banana, lemon, sandwich, milk, orange, meatball, and salad, are the following:
Fruits and not fruits, where the fruits would be banana, lemon and orange; and the non-fruits would be sandwich, milk, meatball and salad.
Food of animal and vegan origin, where the food of animal origin is sandwich, milk and meatball, and the vegan food is banana, lemon, orange and salad.
The following food items can be classified based on either plant or animal origins.
Classification of food productsFood is a substance that contains nutrients that is required for the growth and maintenance of the living organisms.
Food can be gotten from various sources which includes plant and animal sources.
Examples of plant sources are banana, lemon, sandwich, orange and salad
Examples of animal sources are milk and meatball. This is because it can be processed from cow and ram.
Therefore, the following food items can be classified based on either plant or animal origins.
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2. What is the percentage likelihood that the couple will have a child that has the allele for cystic fibrosis
Answers
Answer:
the answer I got for the question you asked is 75%
define cell and atom
Answers
Answer:
Cell: All living organisms are made up of cells, which are the basic building components. Cells also carry the body's genetic material and have the ability to replicate themselves. Cells are made up of several components, each of which serves a particular purpose. Organelles, for example, are specialized structures that perform specific activities within the cell.
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Atom: Protons, neutrons, and electrons are the three subatomic particles that make up an atom. The nucleus, which is made up of protons and neutrons, is at the core of the atom, while electrons float around in a tiny cloud above it.
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hope it helps...
have a great day!!
. Imagine the following scenario. A bacteriophage taken for the treatment of cholera infects a cholera-causing bacterium and temporarily enters the lysogenic stage. When the virus re-enters the lytic cycle, it includes some pieces of the bacterial DNA in its own genome. Specifcally, this DNA encodes information for making the cholera toxin. Imagine some of the possible consequences of this scenario. What will happen to the next bacteria that the virus infects
Answers
Answer:
The virus will transfer the DNA encoding cholera toxin to the next bacteria it infects, which will make that bacteria cholera-causing.
Explanation:
The process described in this question is a kind of gene transfer in bacteria called TRANSDUCTION. Transduction is the transfer of fragments of DNA from one bacterium to another via a virus called bacteriophage.
As stated in this question, the virus (bacteriophage) infects a cholera-causing bacterium. The bacteriophage moves from lysogenic cycle to lytic cycle and includes some pieces of the bacterial DNA, which encodes information for making the cholera toxin, in its own genome.
This means that the cholera-making toxin DNA is now a part of the virus's genome and hence, will transfer it to the next bacteria it infects in a process called TRANSDUCTION. This will make that bacteria a cholera causing bacteria.
Which product comes from protist
A. Yeast in sourdough bread
B. Mushroom on pizza
C. Cork in bulletin boards
D. Carrageenan in milk
Answers
Answer:
C. The cork in bulletin boards
Explanation:
Cork is made primarily from a plant called Quercus suber (the cork oak).
imagine that you are conducting tests shortly after a nuclear accident.Using potted moss plants as you experimental organisms,design a experiment to test the hypothesis that the frequency of mutations decreases with the organisms distance from the source of radiation
Answers
Answer:
Take two potted plants and provide equal conditions to both.
Explanation:
Two potted plants i.e. one is placed near the nuclear accident site while on the other hand, the other is placed far away from the nuclear accident. Provide equal conditions to both plants so that we can find out the hypothesis that the frequency of mutations decreases with the organisms distance from the source of radiation. The result shows that the potted plant that is located near to the nuclear accident site having high frequency of mutation as compared to other plant due to the radiation present at that location.
Which of the following terms describes the distribution of a particular allele
within a population?
A. Allele dominance
B. Allele strength
C. Allele frequency
D. Allele density
Please help me
Answers
Answer:
Option : B Allele frequency...Explanation:
The answer is allelic frequency. This is also the fraction of a particular allele of a gene in the population. please marks me as brainliests..please for my answer please...In mice, apricot eyes is recessive to black eyes. Tail length is governed by another gene, linked to the eye color gene. Long tails is dominant to short tails. To determine the distance between the two genes, a double heterozygote is mated in a testcross and the classes of progeny produced were as follows:
Apricot eyes, Long tails 33
Apricot eyes, Short tails 20
Black eyes, Long tails 17
Black eyes, Short tails 30
Determine whether the heterozygous parent is in the cis or trans arrangement.
a. Cis
b. Trans
Answers
Answer:
trans
Explanation:
From the given information:
The study observes the genes present in mice for eye color and tail length. Since both genes are linked, it implies that they exist in the same chromosomes.
Black eyes is dominant over apricot eyes
Let Black eye be B and apricot eyes be b
Long tail is dominant over short tail
Let long tail be L and short tail be l
If double heterozygote(homoozygous-recessive) engage in the testcross
Then:
From the result given:
The parental combinations are:
Apricot eyes, Longtail (bL / bl) = 33
Black eyes, Short tails (Bl / bl) = 30
The recombinant genes are:
Black eyes, Long tails (BL / bl) = 17
Apricot eyes, Short tails (bl / bl) = 20
The recombination frequency relates to the distance between the two genes which can be computed as:
= (20+17)/100
= 37%
Thus; the heterozygous parent is in trans arrangement.
What does a single colony of a pathogenic microbe represent?
Answers:
A clone
A species
A serotype
All answers are correct
No answers are correct
Question 9
Answers
Answer:
clone
Explanation:
Write an experiment to show that sunlight is necessary for photosynthesis.
Answers
Answer:
Explanationwe have two or three plants, they both get the same water every day they both get the same amount of soil and fertilizer, one is without sunlight and one is with, after a 2 weeks our results will be found
hope this helps
What fraction of the progeny of the cross BbTt x BbTt will have black fur and long tails?
A) 0/16
B) 1/16
C) 3/16
D) 9/16
E) 16/16
Answers
Answer:
plzzzz upload a full picture
what is 2 plus two and what is four plus four and what is five plus five and what is six plus six
Answers
Answer:
2+2=4. 4+4=8. 5+5=10. 6+6=12.
Explanation:
I'll just explain one? It takes around 360 pages to fully prove 1+1=2 so I'll just explain it the way I do. Draw some tallies. Draw 2 tallies and 2 more next to them. Count the total tallies, and you should get 4. (Sorry about this)
Explain how animals may have influenced the evolution of terrestrial plants and vice versa
Answers
Anyone have a clue what dog breed this is?
Answers
Answer:
weenie dog but the scientific name for it is a Dotson
What is NOT an effect of growth hormone?
a. Growth hormone directly stimulates osteoblasts in the periosteum to promote appositional growth.
b. Growth hormone increases the rate of mitosis in the epiphyseal plate of growing bones.
c. Growth hormone promotes the closure of the epiphyseal plate.
d. Growth hormone increases the activity of osteogenic cells.
Answers
C. Growth hormone promotes the closure of the epiphyseal plate.
The closure of the epiphyseal plate is NOT an effect of growth hormone (option c).
The epiphyseal plate is a layer of hyaline cartilage between the epiphyses and metaphyses at the ends of long bones.
The epiphyseal plate is completely closed when bone growth is completed (around age 18 to 21 years).
Different hormones (i.e., testosterone and estrogen) released at puberty initiate the closure of epiphyseal plates.
In conclusion, the closure of the epiphyseal plate is NOT an effect of growth hormone (option c).
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Post Lab Report Part II 6. The probability that the two offspring you produced share every genotype in common is extremely low. Explain why they are likely to be different. 7. How would genetic variability be affected if more chromosome pairs were added? What about if another partner was added?
Answers
Answer:
Explanation:
Answer to 6:
The probability of two offspring with the same genotype is very low because due to recombination between the chromosomes of the father and mother each gamete has a different composition of genetic material. The only chance that they share the genotype is if they were zygotical twins.
Answer to question 7:
When you increase the number of chromosomes the variability will increase too.
And here is another one, help meeeee HUHUHU, I'm exhausted (only for those who know the answer)
I need explanation for your answers, even though it's multiple choices, I still need your explanation for it.
DUE TOMORROW!
If your answer is NONSENSE it will be deleted as soon as possible!
But if your answer is CORRECT, HELPFUL, HAS AN EXPLANATION, I'll chose your answer as the BRAINLIEST ANSWER!
Answers
Answer:
14. (a) Pb
15. (d) Al
16. (A) increases
Explanation:
14.
In the reactivity series of metals an element can displace another element from a compound if and only if it is not placed below that metal, as the reactivity of metals decreases when moving from top to bottom- if a metal is placed below Hydrogen it means that it is less reactive than Hydrogen and hence cannot displace Hydrogen from its compound.
All options except A are placed below Hydrogen in the reactivity series, so they wont displace Hydrogen from its compound, but option (a) that is Pb can do so as it is above Hydrogen in the reactivity series.
15.
Al is placed below Mg in the reactivity series and hence cannot displace Mg from its compound.
16.
The reactivity of metals increases down the GROUP.
[CAUTION :- We were talking 'bout REACTIVITY SERIES in the top 2 questions where reactivity decreases down the group, but we're talkin' 'bout GROUPS of the periodic table here, where reactivity increases down the group.]
The size of metals increases down the group causing their valence electrons to drift far from the nucleus so that they can be lost easily. The metals have a property of losing electrons so the more electrons it can lose more will be its reactivity.
Hence, reactivity increases down the group.
who do study edexcell certificate level? and can help be physics,chemistry and biology exam
Answers
I have done GCSE sciences and also applied science a level so I could probably help you :)
3. A bacterial isolate from a urine specimen was grown in culture, Gram stained, and then tested for its ability to ferment sugars and hydrolyze various subtrates. What approach to bacterial identification is this an example of
Answers
Answer:
Phenotypic approach for bacterial identification
Explanation:
Bacterial identification can be done by conventional methods, which are based on phenotypical characteristics. These methods are much affordable and reasonable.
Phenotypical identification is based on bacteria´s observable characteristics, such as their morphology, development, and biochemical/metabolic properties.
It is important to consider that these methods do not provide absolute certainty. They can only indicate the genera or species to which the bacteria under study may belong.
Some primary evidence is usually used for fast bacteria identification:
Gram staining, morphology, growth at different media or different incubation atmospheres, glucose fermentation, spores production, motion, aerobiosis/anaerobiosis, among others.Knowing that the bacteria in the exposed example was isolated and grown in culture, then Gram-stained and tested for biochemical reaction, we can assume that the approach for its identification is phenotypic.
Which of the following statements about the law of conservation of matter is correct?
O Matter cannot be created, destroyed or transformed
O Matter can be created and destroyed, while still being transformed
O Matter cannot be created or destroyed, it can only be transformed
Answers
Answer:
3, Matter cannot be created or destroyed, only transformed
Answer:
matter cannot be created and or destroyed,it can only be transformed
Why do you think during the evolutionary process there was a correlation between brain size increasing while cecum size decreased in the omnivores?
How does insect respiration differ from that of vertebrate respiration? How do they manage to respire?
Answers
Answer:
Brain size increase due to find out improved quality diets whereas cecum size decrease due to reduction of its need.
Explanation:
Brain size increased due to the need to increase the mental capacity of an organism in order to explore the environment for the survival such as search for improved quality diet and the cecum size decreased because omnivorous diet improved due to the reduction of its need as a component of the digestive system. Insects have different respiration system as compared to vertebrates because vertebrates uses lungs for respiration whereas the insects uses tracheal tubes for the absorption of oxygen and removal of carbondioxide gas.
Define the term akaryotes and give one example
Answers
Answer:
These are cells without nucleus or nuclei.
Example: Red blood cells.
Lactase is an enzyme that is produced in the lining of the intestines. This enzyme helps the body speed up the
breakdown of carbohydrates that are found in dairy products, such as milk, yogurt, and cheese.
Which general function does lactase perform?
Answers
Answer:
Regulation of cell processes
Explanation:
Lactase is an enzyme that helps in the breaking down of disaccharide sugar, lactose, found in many foods. It does it by converting the lactose into its component reducing sugars - glucose and galactose. This enzyme is produced by some special cells lining the intestinal walls of humans and forms a kind of chemical barrier known as brush border where foods must pass through before being absorbed. By so doing, foods are screened for the presence of lactose and any lactose is broken down before the foods are given a pass.