How has the discovery of Gram Staining

revolutionized how microbes are treated

Answers

Answer 1

Answer:

See the answer below

Explanation:

The discovery of Gram staining has revolutionized how microbes, especially bacteria, are classified. Bacteria that are positive for Gram staining are classified as Gram-positive while those that are negative to the procedure are termed Gram-negative.

What constitutes positivity or negativity to the Gram staining procedure is the ability of the cell walls of bacteria to either retain a dye or allow it to be washed off during the procedure. The components of the cell wall differentiate Gram-positive bacteria from the Gram-negative ones and confer the ability to retain dye on the former. Gram-positive bacteria have thick peptidoglycan cell walls and lower lipid contents as compared to the Gram-negative bacteria and with this, they are able to retain the color of the stain used during the Gram staining procedure.

During the Gram staining, a scoop of the bacterial isolate is usually smeared and heat-fixed to a glass slide. Thereafter, crystal violet drops are added to the slide, poured off, and then rinsed with water. A few drops of iodine are then added and allowed to stay for a few seconds before being poured off and rinsed. A decolorizer (an alcohol) is then added to the slide, allowed to stay for a few seconds before it is washed off. The addition of a counterstain follows and the slide is allowed to stay for another few seconds before the stain is washed off. The slide is then rid of water and then viewed under the microscope. A Gram-positive bacterium will able to retain the color of the dye which is purple while a negative bacterium will lose the color of the dye and appear red under the microscope.


Related Questions


What do you think is happening in this picture?

Answers

Answer:

the dot are tranporting to the other section Explanation:need a bit mor

info tho

please urgent help... below is a diagram of a cart on a flat surface being acted upon by a force to the right. assume that friction is negligible. use the diagram to answer the following question. if the mass of the cart was increased to 20 kg, what would happen to the acceleration? the acceleration would...

Answers

Answer:
Decrease

Explanation:
Acceleration is inversely proportional to the mass of an object.
Acceleration decrease as the mass of the object increase

If u use the formula F=ma to calculate, you will get
a=0.5m/s2 for the first situation (m=10kg) and a=0.25m/s2 for the second situation (m=20kg)

this mannitol salt plate was inoculated with an unknown staphylococcus species. what can you conclude about this unknown organisms

Answers

Complete question: Analyzing Mannitol Salt Agar (MSA): An MSA plate was inoculated with an unknown Staphylococcus species. What can you conclude about this unknown organism?

A. It can ferment mannitol.

B. It produces acid during fermentation, leading to a lower pH in the medium.

C. It can tolerate higher salt concentrations.

D. It could be S. aureus.

E. All the above

Answer: The correct option is E ( all of the above)

Explanation:

Culture medium is a growth medium that is used in microbiology which permits the growth of microorganisms. It can be in a gel or liquid form. There are different types of culture medium which includes:

--> Differential medium

--> Selective medium

--> Enriched medium

Mannitol Salt Agar( MSA) is a type of selective culture media that is used in microbiology for the identification and isolation of staphylococcus species from biological samples. A typical MSA includes essential growth factors and trace nutrients such as nitrogen, vitamins, minerals and amino acids essential for growth. The medium contains sodium chloride( salt) with mannitol which is the fermentable carbohydrate source

Staphylococcus aureus organisms are capable of fermenting mannitol, produces acid during fermentation leading to a lower pH in the medium, and can tolerate higher salt concentrations. Therefore the unknown organism is POSITIVE to mannitol salt agar analysis. Thanks and I hope it helps!

ILL GIVE BRAINLY PLZ HELP Fisherman at Reelfoot Lake, in Northwest Tennessee, noted a drop in the number of catfish. What is the most reasonable conclusion, based on the data provided?
A) The pH of the rain will not affect the fish that live in the lake.
B) The pH of the rain falling into the lake is of level that it is killing the adult fish.
C) The pH of the rain falling into the lake is of level that it is affecting fish reproduction.
D) The pH of the rain falling into the lake is of level that it is both affecting fish reproduction and killing adult fish.

Answers

Answer:

D, if you look at the acid rain it covers both death of fish and reproduction

Multiple Choice: Which survivorship curve best describes most marine organisms (few adults produce large number of eggs and larvae)

Answers

Complete question:

Which survivorship curve best describes most marine organisms (few adults produce a large number of eggs and larvae).

Type IType IIType IIINone of the above

Answer:

Type III

Explanation:

There are three survivorship curves, each of them corresponding to different species according to their reproductive strategies.

Type I. Organisms do not tend to die when they are young or middle-aged, but they do when they are old. These species, in general, have a few descendants and parents provide much parental care to ensure their progeny to survival.  Type II. Organisms that have more or less the same probabilities of dying in each age interval. These organisms can also have a few descendants and they can provide significant parental care. Type III. Only a few individuals survive their first period of life or their firsts years. However, the lucky ones to reach a certain age generally have a long life. These organisms have a lot of descendants at the same time, but they do not provide much parental care. This is the case of most marine organisms that produce a large number of eggs and larvae when they are adults, but they do not provide parental care.    

Which of the following is NOT a necessary input for the process of cellular respiration? 1. CO2 (carbon dioxide) 2. Glucose 3. Sugar 4. O2 (oxygen)

Answers

Answer:

CO2

Explanation:

Hope this helps :)

CO2 (carbon dioxide) is NOT a necessary input for the process of cellular respiration.

What is cellular respiration ?

A series of chemical reactions known as cellular respiration break down glucose into ATP, which can be used as energy to power numerous body processes. Cellular respiration has three main stages: the citric acid cycle, glycolysis, and oxidative phosphorylation. The citric acid cycle takes place in the mitochondrial matrix, glycolysis takes place in the cytosol, and oxidative phosphorylation takes place on the inner mitochondrial membrane. Glucose, ATP, and NAD+ are the cellular respiration starting reactants, the rate-determining enzymes for cellular respiration are phosphofructokinase-1, pyruvate dehydrogenase, and isocitrate dehydrogenase, and the final products include ATP and water. One or more enzymes involved in cellular respiration, like succinyl-CoA-synthase or pyruvate kinase, are typically disrupted by diseases that affect this process.Glycolysis is the only process that can take place without oxygen, and only two ATP molecules can be produced for each glucose molecule. ATP and H2O are the two final end products of cellular respiration. Glycolysis produces two pyruvate molecules, four ATPs (a net of two ATP), two NADH molecules, and two H2O molecules.One acetyl-CoA, one NADH, and one CO2 are produced for each pyruvate molecule when oxygen is present. One GTP, three NADH, one FADH2, and two CO2 are the products of the TCA cycle. GTP is an energy-rich compound similar to ATP that is typically used in environments with lower pH. The electron transport chain can then use NADH and FADH2 to make more ATP as part of oxidative phosphorylation.

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3. Which of the following is an example of an artificial concept?
mammals
a triangle’s area
gemstones
teachers

Answers

Answer:

A triangle's area

I hope I helped you, have a great dayy

What is planned goal for the Europa Clipper mission (if you answer you get 100 pints need ASAP

Answers

Your lovely peaches I knew it

Answer:

NASA's Europa Clipper will conduct detailed reconnaissance of Jupiter's moon Europa and investigate whether the icy moon could harbor conditions suitable for life.

Explanation:

g The gastrointestinal tract has 4 basic layers. Which layer is the one that comes in contact with the food that you eat?]

Answers

Answer:

Muscularis propria

Explanation:

The gastrointestinal tract has the following four basic layers:

1.  Mucosa is the innermost layer

2. Submucosa is underneath the Mucosa

3. Muscularis propria

4. Adventitia is the outermost layer

Muscularis propria  is the one that comes in contact with the food that you eat.


8. What does the term aromatic imply about an organic molecule​

Answers

An aromatic molecule or compound is one that has special stability and properties due to a closed loop of electrons. Not all molecules with ring structures are aromatic.

How is the cell division of cancer cells like these misregulated?

Select all that apply.


Such cells are not inhibited by density.

Such cells can divide in the absence of growth factors.

Such cells skip the G1 phase of the cell cycle.

Such cells do not require anchorage to a surface in order to divide.

Such cells do not respond to signals that normally trigger apoptosis.

Such cells do not need enzymes for DNA replication.

Answers

Cancer is due to irregularities in cell division that are caused by mutations in cancerous cells. These mutations inhibit apoptosis and favor cell division.  Among the options, the correct ones are 1, 2, 4, and 5.

------------------------------------------

Cancer is the result of irregular cell division.

Its development and progression are closely related to changes in the cell cycle regulator factors.

Cancerous cells

Divide when they should not do it  ⇒ overactivity of the positive cell division regulators.

• Do not stop dividing when they should  ⇒ reduction in the activity of cell division inhibitors

• Do not die when they should  ⇒ loss of the apoptotic capability

• Leave the area where they are growing ad travel to other parts of the body ⇒ metastasis

Normal cells divide and die during a programmed period.

When a normal cell mutates or suffers from any alterations that can not be repaired, it automatically activates its apoptotic process.

However, cancerous cells lose the capability of dying and their reproductive inhibition, so they keep growing and dividing with no limits.

The unlimited division occurs because mutations in cancerous cells influence the cell cycle by favoring proliferation and inhibiting senescence and apoptosis.

These cells do not depend on external growth factors or other protein signals to divide.

Cancerous cells can release their own growth factor and even influence neighbor cells to produce and release these substances.

Cell division is constant even when there is no space.

Sometimes over multiplication creates tumors that might affect healthy neighbor cells and the tissue itself.

Among the options,

1) Such cells are not inhibited by density. CORRECT

 

2) Such cells can divide in the absence of growth factors. CORRECT

 

3) Such cells skip the G1 phase of the cell cycle. INCORRECT

 

4) Such cells do not require anchorage to a surface in order to divide. CORRECT

 

5) Such cells do not respond to signals that normally trigger apoptosis. CORRECT

 

6) Such cells do not need enzymes for DNA replication. INCORRECT

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Cancer cells can divide in the absence of growth factors.  Cancer cells do not require anchorage to a surface in order to divide.  Cancer cells do not respond to signals that normally trigger apoptosis.

Cancer cells can multiply without any growth factors whereas normal cells will not divide without the addition of growth factors. Cancer and tumor cells are less dependent on anchorage. They are free to proliferate, and invade tissues. A normal cell that have damaged DNA will undergo apoptosis while on the other hand, cancer cell with unfixable DNA will not undergo apoptosis and will continue multiplication.

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identify the layers from oldest to youngest using those letters​
fast answer pls ill mark u brilliant

Answers

C,D,B,A on the left B,D,A on the right

During which phase of meiosis does the separation of homologous chromosomes occur?

Answers

Answer:

In anaphase I, centromeres break down and homologous chromosomes separate. In telophase I, chromosomes move to opposite poles; during cytokinesis the cell separates into two haploid cells.

Let me know if this helps

Thanks :)

Explanation:

How does deforestation affect coral reefs?

Answers

The world's coral reefs are being damaged by harmful runoff, which new research shows is being caused by the clearing of forests. Preventing soil erosion may help protect the reefs, which shield coastlines from ocean waves, draw tourists with their brilliant colors and provide a habitat for fish.

For centuries, humans around the world have been clearing away forests to make room for livestock, farming, and other uses. Scientists say that when the forest cover is lost, soil washes away into rivers that flow into the oceans and, they believe, onto coral reefs.

That runoff adds nutrients to the ocean water. It's essentially too much of a good thing, and scientists have long suspected it can kill the coral. Runoff also clouds the water, blocking light from reaching the reef.

Answer: When the forest cover is lost, soil washes away into rivers that flow into the oceans and, they believe, onto coral reefs. That runoff adds nutrients to the ocean water.

Explanation: Basically, when this occurs, the roots are no longer attached to the soil, letting all the nutrients get ruined in the ocean water instead of feeding plants/animals/trees.

Which organelle acts as the cells command center?
-Nucleus
-Ribosomes
-clole
-Chloroplasts
-Lysosomes

Answers

Answer:

nucleus

Explanation:

ILL MARK BRAINLIEST PLEASE ANSWER QUICK!!!!

Answers

Answer:

C, B, A, D

Explanation:

I'm pretty sure this is it, sorry if it's wrong

Help me please , easy 10 points ... just look at the picture & answer the question.

Answers

Copper is metallic !!

EXPLAIN 2 DIFFERENCES BETWEEN THE BREAD MAKING ANDALCOHOL PRODUCTION PROCESSES.

Answers

Answer:

Pastry dough is rolled out thinly and used as a base for baked products. Pastry is differentiated from bread by having a higher fat content, which contributes to a flaky or crumbly texture. ... On the other hand, overmixing results in long gluten strands that toughen the pastry.

what are the characteristics for induction?

Answers

what do you mean??????

Adenine and Thymine are examples of...

Answers

Adenine and Thymine are examples of nitrogenous bases in a nucleotide.

What is a nucleotide base?

A nucleotide is the monomer constituting DNA or RNA biopolymer molecules.

Each nucleotide consists of a nitrogenous heterocyclic base (or nucleobase), which can be either a double-ringed purine or a single-ringed pyrimidine; a five-carbon pentose sugar (deoxyribose in DNA or ribose in RNA); and a phosphate group.

The two classes of nitrogenous bases are purines and pyrimidines and they are as follows;

Purines - Adenine and GuaninePyrimidines - Cytosine, Uracil, Thymine

According to this question, Adenine and thymine are examples of nitrogenous bases.

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Read the excerpt from Part 2 of "The Most Dangerous Game,” by Richard Connell. Then, wet with sweat and aching with tiredness, he crouched behind the stump of a lightning-charred tree. He knew his pursuer was coming; he heard the padding sound of feet on the soft earth, and the night breeze brought him the perfume of the general's cigarette. It seemed to Rainsford that the general was coming with unusual swiftness; he was not feeling his way along, foot by foot. Rainsford, crouching there, could not see the general, nor could he see the pit. He lived a year in a minute. What conclusion can a reader draw about Rainsford based on a visualization of the excerpt? He is relieved. He is lost. He is frightened. He is confused.

Answers

Answer:

I think it's he is frightened

Explanation:

hope this helps ( ̄▽ ̄)"

Answer:

c on edge

Explanation:

PLZ HELPPPP I NEED IT NOWEE

Answers

I’m pretty sure.Plasma membrane,ribosomes,cytoplasms and dna.

Which best describes an adaptation that could be found in a fish that lives in a slow-flowing stream?
O the ability to attract prey by glowing
O extra gills, for oxygen extraction
O the ability to grow larger
O extra fat, for warmth

Answers

Answer:

B-Extra gills, for oxygen extraction

Explanation:

Is everything in an ecosystem is connected?​

Answers

Everything in the natural world is connected an ecosystem is a community of living and non living things that work together ecosystem in nature work the same way all the parts work together to make it balance system
Answer:Everything in a natural world is connected. An ecosystem is a community where living and non-living things.Ecosystems in nature work the same way.All the parts work together to make a balance system!!

In a strike-slip fault, the rocks on either side of the fault slip past each other sideways with little

Answers

The answer I believe is up or down motion.

In a strike-slip fault, the rocks on either side of the fault slip past each other sideways with little up or down motion.
(Please Mark brainliest if correct )

Which of the following are not present in animal cells?

Answers

Animal cells don’t have chloroplast

KUES Questions
8. A water wave has a frequency of 2 Hz and a wavelength of
5 m. How fast does it travel through the water?

Answers

Answer:

10m/s

Explanation:

Given parameters:

Frequency of wave  = 2Hz

Wavelength = 5m

Unknown:

Speed of the wave  = ?

Solution:

The speed of a wave is derived from the product of wavelength and frequency;

     speed  = frequency x wavelength

Insert the parameters and solve;

    speed  =2 x 5 = 10m/s

How is the small ribosomal unit positioned to allow for translation to start at the proper start codon

Answers

Answer:

The correct answer is "Shine Dalgarno sequence".

Explanation:

A consensus originally characterized throughout the mRNAs to Escherichia coli seems to be the Shine-Dalgarno chain.  Proteins manufactured through sequences comprising unique sequences became generated more gradually or slowly than similar proteins encoded of separate but interchangeable codons from genes, researchers observed.

Can a person keep a ringneck dove and a diamond dove together?

Answers

Answer:

Ringnecks and diamond doves can be kept as pets in a variety of ways. They can be a single bird, bonded to its owner with or without free flight within the home, or they can be a breeding pair, bonded to one another, producing young

lol helppppppp Thnks a

Answers

minor planet............

Answer:

ikjuhgfcdertyujkiuyhg

Explanation:

Other Questions
14. As an American empresario, Green Dewitt was able toA. negotiate a treaty with the American Indian tribesB.establish a colony near what is present-day GonzalesC.continue the work that Moses Austin had started in TexasD. Join with Martin De Leon doubling the site of his land holdingsPLEASE HURRY!! URGENT: What is the most important function of scenery?To create the world of the characterTo set the mood of the sceneTo show the time period of the playTo show who the characters are What si the answer of Y = 7x -3 for x Help what is the sum of the first 30 multiplies of 3?A.1200B.1395C.1500D.1490 How does predestination relate to religious belief? Which of the following is true regarding prenatal tests?All prenatal tests are safe for the mother and her unborn baby.Amniocentesis is less risky than the AFP blood test.Amniocentesis and chorionic villi sampling are the prenatal tests that pose the highest risk to the pregnant woman and her unborn baby.All prenatal tests are unsafe and should not be performed. What is the volume of the triangular prism? They are 4 springs stretched by the same mass. Spring a stretches 25cm, spring B stretches 10cm, spring C stretches 100cm, and spring B stretches 1 cm, which spring has the largest spring constant Name and describe five ways that organisms reproduce using examples to show sexual and asexual reproduction. Con tu compaero(a), busca palabras que se usan para hablar de la ropa, el calzado, la alimentacin, las profesiones...en estas ciudades. Ciudad de Mxico Caracas Buenos Aires MadridEscribe un breve dilogo con tu compaero(a)usando las palabras que encontraste. A wheel rotates through an angle of 15.6 rad as it slows down uniformly from 22.0 rad/s to 13.5 rad/s. What is the magnitude of the angular acceleration of the wheel How do artists offer different interpretations of the world in their artworks HURRY ASAP) What does the descriptive language in this passagehelp readers to visualize?Read the excerpt from The Call of the Wild.A poor substitute for food was this hide, just as it hadbeen stripped from the starved horses of the cattlemensix months back. In its frozen state it was more likestrips of galvanized iron, and when a dog wrestled itinto his stomach it thawed into thin and innutritiousleathery strings and into a mass of short hair, irritatingand indigestible.O how dry and tough the meat isO how freezing the weather isO how thin and sick the horses areO how hungry the cattlemen are To which kingdom does E. coli belong?A FungiB. ProtistaC. ArchaebacteriaD. Eubacteriasyy during reccesion, why high specialized is less likely to survive than diversified firm Will give brainliest.In Part One of 1984, what do we learn about Winstons past and what is suggested about the partys acquisition of power? how are coastlines formed NO COPY AND PASTING Are selfies dumb? ClaimReason Evidence Counterclaim Rebuttal Conclusion 7. Two people enter a whispering gallery t want to know where they should stand so they can hear other people whisper. The gallery is too fast wide and the vertical distance from their head to the peak of the ceiling is 30ft. Why does knowing your purpose help make reading more interesting? A. Having a purpose helps you have a conversation with the text. B. Having a purpose provides you with a picture in your mind.C. Having a purpose makes it easier to obtain information. D. Having a purpose enables you to decode and understand unfamiliar words.