Many bacteria that are able to metabolize citrate produce negative results on this test. why

Answers

Answer 1
Many bacteria that are able to metabolize citrate produce negative results on this test because the bacteria may be able to metabolize citrate, but it does not mean that it can transport into the cell. Bacteria are the tiny living microorganisms. Bacteria causes the human and animal diseases.
Answer 2
Final answer:

Some bacteria that can metabolize citrate can still yield a negative citrate test result. This is usually because they lack the citrate transporter protein, a necessary enzyme for actual citrate utilization. Therefore, the ability to metabolize does not necessarily correlate with a positive citrate test.

Explanation:

The topic in question refers to how some bacteria that can metabolize citrate, produce negative results on a citrate test. The citrate test is a biochemical test, which is utilized to determine a bacterium's ability to utilize citrate as its sole carbon source. So, if a bacterium can use citrate, they would be expected to yield a positive result. However, some bacteria, like some enteric bacteria, even though they are technically capable of metabolizing citrate, they might lack the gene for the citrate transporter protein (an enzyme which allows citrate to be brought into the cell and metabolized), and thus produce a negative citrate test result.

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Related Questions

Analyze this case in which the patient record states:40 year old male patient (new) is evaluated for contusion of a finger. the history and examination were problem focused.

Answers

Finger contusion can be characterized by bruising of finger, where there is swelling and bleeding under the skin but no broken bones.

1. Diagnosis and Management:- Contusion of finger is diagnosed by the symptoms such as pain, swelling, discoloration, tenderness and difficulty in movement. Sometimes numbness is associated as swelling compresses the nerves in that region.X-ray (If required CT scan0 can be done to confirm the diagnosis and rule out fractures and other serious forms of injuries.

Depending upon the severity, treatment is decided. The contusion is managed with an aim to reduce pain, swelling and restore the movement. The options so as to treat the contusion, based on its severity are as follows

a. Applying Icepacks and keeping the finger propped up above the heart level.

b. Splinting and taping

c. Physiotherapy

d. Ultrasound therapy

e. Surgical treatment is required in case of torn ligaments.

These options of treatment are accompanied with over the counter pain killers and anti inflammatory drugs

 

The ____________ contains vertically arranged maculae that would provide feedback of body movement in the vertical plane

Answers

"The saccule contains vertically arranged maculae that would provide feedback of body movement in the vertical plane."

The saccule is a group of sensory cells that's in the inner ear. When there head movements that are in the vertical plane, these cells in the macula are disturbed from their position and inform the connecting neurons that movement that's taking place. This information is taken to the vestibular nuclei.

The movement of protons (h+) through the atp synthase occurs from ______ to ______ proton concentration.

Answers

The correct answers are "high; low" in that order. This is the correct answer because hydrogen ions (h+) are in a higher concentration extracellularly The ions are then pumped back into the intracellular matrix via the atp synthase pump where there is a lower concentration of h+ ions.

The three main effects of ____ are pain reduction euphoria and constipation

Answers

opiates, maybe? let me know id thats right

Answer:

Opiates

Explanation:

Opiates are the chemicals that are obtained by the modification of natural opium components. High amount of opiates in the body can cause death of an individual.

Opiates are used to reduce pain, euphoria , produces the sense of well being and constipation. Regular use of opiates can cause addiction in the organism.

Thus, the answer is opiates.

Consider the diagram. mc004-1.jpg Josiah says this is a phylogenetic tree of the dinosaurs. Maleek says it is a cladogram of the dinosaurs. Who is correct?

Answers

BOTH JOSIAH AND MALEEK ARE CORRECT.
Both phylogenetic tree and cladogram are used for the same purpose, although there are a few minor difference between the two. Phylogenetic tree and cladogram are branching diagrams which are used to show inferred relationship among various biological species.

Answer:

c

Explanation:

does a plant have a closed or open circulatory system

Answers

Open because there is an open cavity called a hemocoel.

NEED HELP! Will mark brainiest, heart, 5star, anything!

Question 1
The cell cycle is a repeating series of events that include growth, DNA synthesis, and cell division.

A.True
B. False

Question 2
During which stage of the cell cycle does the cell condense chromosomes and break down the nuclear envelope?

Anaphase
Interphase
Metaphase
Telophase

Question 3
Which is the third stage of mitosis?

Anaphase
Interphase
Metaphase
Telophase

Question 4
How is cytokinesis different in animals and plants?

Animal cells get pinched into two daughter cells by the cell membrane; the plant cell has to form a cell plate before it can create daughter cells.
Animal cells give daughter cells a full set of chromosomes at the time of division; plant cells give daughter cells a half set of chromosomes.
Animal cells require an extra growth phase before cytokinesis; plant cells move straight to cytokinesis.
Animal cells begin cytokinesis during anaphase; plant cells begin around the same time as telophase.

Question 5
During which stage of interphase does the cell grow to nearly its full size?

First gap
Second gap
Prophase
Synthesis

Question 6
Which of the following is one stage of the cell cycle?

Cellular respiration
Mitosis
Multiplication
Photosynthesis

Question 7
Explain why it is important for daughter cells to have a full set of chromosomes. Use complete sentences.


Answers

question 1 is true 
question 2 Interphase 
question 3 Anaphase
question 4
question 5 Synthesis
question 6 Cellular respiration
question 7
Question 1
The cell cycle is a repeating series of events that include growth, DNA synthesis, and cell division.TRUE.

Question 2
During which stage of the cell cycle does the cell condense chromosomes and break down the nuclear envelope?Telophase.

Question 3
Which is the third stage of mitosis?Anaphase.

Question 4
How is cytokinesis different in animals and plants?The most observable difference is the way in whichcytokinesis occurs. In plants a new cell wall is fashioned between the new daughter cells, while inanimal cells the cell membrane constricts to pinch the parent cell into daughter cells.

Question 5
During which stage of interphase does the cell grow to nearly its full size?First gap.

Question 6
Which of the following is one stage of the cell cycle?Mitosis

.Question 7
Explain why it is important for daughter cells to have a full set of chromosomes. Use complete sentences.In some living organisms, asexual reproduction occurs by many means: b1inary division, schizogony, budding, grafting, etc. In the asexual reproduction of eukaryotes, mitosis is the mechanism by which the cells that make up the new organisms are produced.

The term mitosis does not apply to prokaryotes since, it involves nuclear division and eukaryotic structures.





Choose the appropriate term to fill in the sentence: when mrs. m ate, her intestinal contents became __________ to her blood. her blood became __________ to her intestinal contents.

Answers

The answer to this question would be: hypertonic, hypotonic

After eating, the intestine is filled with food that will be digested. Food that digested will turn into a much smaller unit of carbohydrate, amino acid and fatty acid that will cause the intestine to have hypertonic solution compared to the blood. This will induce diffusion of some molecule to the intestinal cell, and then to the blood.

Year-old fell on broken glass and required suturing of a laceration. due to age and combative behavior of the patient, the physician utilized moderate sedation while repairing the laceration. the physician gave the child 50 mg of ketamine im. a nurse monitored the patient during the procedure which took 30 minutes. what cpt® code is reported for moderate sedation?

Answers

What is clear here is that sedation was provided by a physician or other qualified health care professional. Read at the CPT Coding Changes For Moderate Sedation in 2017. It states there will be several codes for moderate sedation. Your statement of the case is not complete, as age is important. The codes for moderate sedation is 99151 to 99157.

Which organelle is made of a phospholipid bilayer? A. cell wall B. cytoplasm C. ribosome D. cell membrane

Answers

That would be, D. Cell membrane
The answer is D Cell membrane because the rest don't have that

The cytoskeleton is an internal scaffolding used for cellular movement true or false

Answers

it's true :)))))))wooo woo

The ara operon is controlled by a regulator protein that exerts ________.

Answers

AraC protein certain to the ara operator works as a repressor that avoid transcription of the same ara operon and the araC gene AraC protein is an activator in the presence of arabinose and repressor in the absence of arabinose -With arabinose absent, the AraC protein stays as
a homodimer. One AraC protein put together to the ara initiator and the other protein now binds to a different regulatory site in DNA called the ara operator.

The atp synthase uses this gradient to restore adp back to atp. what is this process called?

Answers

The process is called OXIDATIVE PHOSPHORYLATION.
Oxidative phosphorylation is the process by which a free phosphate ion is added to ADP in order to produce ATP. This process take place in the mitochondrion and is a major source of energy for anaerobic organisms. The free phosphate ion is usually transferred from NADH or FADH2.
Final answer:

ATP synthase uses a proton gradient to restore ADP to ATP in a process known as chemiosmosis, which takes place during oxidative phosphorylation.

Explanation:

The process by which ATP synthase uses a proton gradient to restore ADP back to ATP is called chemiosmosis. This occurs during oxidative phosphorylation, a key part of cellular respiration where the energy stored in the electrochemical gradient, developed due to the movement of protons (H+), is utilized. As protons flow through ATP synthase, much like water flowing through a turbine, they provide the energy needed for the enzyme to catalyze the production of ATP from ADP and inorganic phosphate (Pi).

15 POINTS! 

Study the diagram, which represents the general equation for photosynthesis. What do the letters Y and Z represent?

Y - glucose
Z - oxygen

Y - glucose
Z - carbon dioxide

Y - carbon dioxide
Z - hydrogen

Y - carbon dioxide 
Z - oxygen

Answers

Answer:

The correct answer is Y - glucose, Z - oxygen

Explanation:

In photosynthesis, plants- and also other organisms- take carbon dioxyde (CO₂), water (H₂O) and light (which is absorbed by chlorophyll pigments, those give plants their green color), and they convert inorganic materia in organic materia (chemical energy) in form of sugar. The overall process is described by the following global equation:

6 CO₂ + 6 H₂O → C₆H₁₂O₆ + 6 O₂

carbon dioxide + water → glucose + oxygen

In the diagram, the equation is:

carbon dioxide + water + sunlight → glucose + oxygen

Answer:

The correct answer is A.

Explanation:

Y represents Glucose, a product of cellular respiration. Z represents Oxygen, which is also a product of cellular respiration.

(CO2 + Water + Sunlight = Glucose and Oxygen)

Hopefully, this helps! :D

Ask your question down below!

The phosphorus-containing head of a phospholipid attracts water and is

Answers

Hfgh hhgch h hchtcvujv

A hypothetical poison prevents nucleoli from carrying out their functions. Which organelles would be affected by this poison? What would the cell be unable to do? Explain.

Answers

THe answer to this question would be: ribosome.

Ribosome function is in protein synthesis. To do synthesis a protein, it will need an RNA with a specific structure. The RNA is made from the nucleus, so if nucleus can copy their DNA into RNA, the protein synthesis will not be able to be executed. 


The structure of hair is formed by keratin. Keratin is most likely which of the following polymers?

Answers

tbe answer is protein.

Answer:

Keratin is a protein.

Explanation:

Keratin is a fibrous protein that has the characteristics of rigid conformation, elasticity and impermeability to water. It has animal origin and is found in the vertebrate epidermis and in some epidermal appendages, such as hair, nails, hooves, feathers and scales. This protein is produced in cells called keratinocytes, which are the most abundant in the human epidermis.

Like any protein, keratin is made up of amino acids. It has a large amount of cysteine residues, which is responsible for 7% to 20% of the total amino acids present in keratin. Note that cysteine is mainly located in the terminal region of the keratin chains.

In the average female, the menstrual cycle lasts ___ days

Answers

The answer is 28 days

which one of these is not a reason that cells require the ability to diffuse materials across their membranes?


Answers

to move carrier proteins, am i right?

to move carrier proteins.

Marvin blows up a balloon but lets go of it. The air inside is released and the balloon goes up into the air. What best describes what happens? A) Gravity pushes the balloon into the air. B) Drag is caused by contact of the balloon with the air. C) Lift lowers the air pressure on the top of the balloon. D) The air pushes the balloon in the opposite direction.

Answers

D) The air pushes the balloon in the opposite direction. Let me know if this helped. 

Answer:

D) The air pushes the balloon in the opposite direction.

Explanation:

When the balloon bursts the air pushes the balloon in the opposite direction to the air that was released from inside the balloon. This is because of the difference between the atmospheric pressure and the pressure that was inside the balloon. When the balloon bursts, the pressure gradient causes a force that causes the air inside the balloon and the balloon to be pushed in opposite directions.

Given a template strand of 3'-atgcttggaca-5' and a partially-made complementary strand containing only 5'-tac-3', what would be the sequence of the new strand of dna (including the 5'-tac-3') if the only additional nucleotides available to dna polymerase were those containing the bases g, a, and c?

Answers

A complementary strand is complementary to the template strand when in the opposite direction, in this case 5'-3', the nucleotides that it contains are complementary to those of the template strand. Thus, the partially-made complementary strand 5'-TAC-3' will bind to the template strand starting on the 3'-ATG-5' portion. Then it is elongated by the DNA polymerase only up to the next nucleotide A, not included, because its complementary nucleotide is T which is not available. So, the sequence of the new strand on DNA would be 5'-TACGAACC-3'.

Please select the word from the list that best fits the definition

similar structures that related species have inherited from a common ancestor A.Species B.Traits C.DNA D.Homologous E. Branching Tree F. Pedigree

Answers

I'm pretty sure the correct answer is Homologous 
I know for a fact the answers aren't A or B or C or F. I do not believe that Branching tree would be the answer because it's asking for the name of SIMILAR STRUCTURES, so it's most likely D

Which meninx surrounding the central nervous system contains blood vessels that nourish the neural tissue?

Answers

The pia mater is a delicate membrane and is one of the three meninges found in mammals and is responsible for nourishing neural tissue such as the brain. Blood vessels that go through the pia mater extend to capillaries that transport blood to the brain.

"why is it necessary to phosphorylate a glucose molecule, creating glucose-6-phosphate

Answers

It is important because the body needs energy from glucose, glycogen phosphorylate, with the help of an orthophosphate, can cleave away a molecule from the glycogen chain. The cleaved molecule is in the form of glucose-1-phosphate, which can be change into G6P phosphate. 

Which of the numbered features is a lateral moraine?

Answers

Uhhh well you didnt list any of them so here is this. 

Lateral moraines are a product of rock fall onto the margin of a glacier. Rock fall is a result of frost weathering of the rock wall and of over-steepening of the cliff by glacial erosion, leading to rock slope failure. The rock debris is carried along the glacier edge as it moves towards the snout.

hope this helps.

(4.02 LC)Which of the following products were created through marine biotechnology? Penicillin Plasma television Fluorescent dyes Lithium batteries

Answers

Wherever there is water, there is usually mold. From a particular mold Penicillium notatum, the first antibiotic was discovered by Sir Alexander Fleming and was called Penicillin. It is a marine biotechnology where subsequent research on other marine fungi was based.  

Answer:

For me the answer was actually Fluorescent dyes and I got a 100%

Explanation:

Chemical compounds from marine organisms can be used for more than medicine. New types of glue have been developed from mussels, heat-resistant enzymes from deep-sea bacteria have industrial applications, and fluorescent compounds from coral and jellyfish can be used commercially as fluorescent dyes.

"we find perennial grasses and flowering plants called forbs in __________ grasslands."

Answers

The biodiversity of the Earth’s vegetation makes up its beauty especially the grassland which is covered mostly of trees and grasses.  There are a lot of varieties of grassland and among of which is savanna grassland where we can find perennial grasses and the flowering plant called forbs.

A doctor prescribes a 500-mg antibiotic tablet to be taken every eight hours. just before each tablet is taken, 20% of the drug remains in the body. (a) how much of the drug is in the body just after the second tablet is taken? after the third tablet?

Answers

A doctor prescribes a 500-mg antibiotic tablet to be taken every eight hours. just before each tablet is taken, 20% of the drug remains in the body.

(a)    how much of the drug is in the body just after the second tablet is taken?

600 mg

after the third tablet?

720 mg

(a) After the second tablet: 600 mg. After the third tablet: 620 mg.

(b) Equation: [tex]\(Q_{n+1} = 0.2Q_n + 500\)[/tex].

(c) Long-term quantity: 0 mg.

(a) To find the quantity of the drug in the body just after the second tablet is taken, we need to consider the elimination of the drug over time and the intake of the second tablet.

The quantity of the drug remaining in the body after the first tablet is 500mg.

After 8 hours, 80% of the drug is eliminated, leaving [tex]\(20\% = 0.2\)[/tex] of the drug in the body.

Thus, after 8 hours, the quantity of the drug remaining in the body is [tex]\(0.2 \times 500 = 100\)[/tex] mg.

When the second tablet is taken, another 500 mg of the drug is added to the quantity remaining in the body.

So, after the second tablet is taken, the total quantity of the drug in the body is 100 + 500 = 600 mg.

Now, to find the quantity of the drug in the body just after the third tablet is taken, we repeat the process:

After another 8 hours, 80% of the drug is eliminated from the body, leaving 20% = 0.2 of the drug in the body.

Thus, after another 8 hours, the quantity of the drug remaining in the body is [tex]\(0.2 \times 600 = 120\[/tex]) mg.

When the third tablet is taken, another 500 mg of the drug is added to the quantity remaining in the body.

So, after the third tablet is taken, the total quantity of the drug in the body is 120 + 500 = 620 mg.

Therefore, after the second tablet is taken, there are 600 mg of the drug in the body, and after the third tablet is taken, there are 620 mg of the drug in the body.

(b) Let's denote [tex]\(Q_n\)[/tex] as the quantity of the antibiotic in the body just after the nth tablet is taken.

To find an equation expressing [tex]\(Q_{n+1}\)[/tex] in terms of [tex]\(Q_n\)[/tex], we observe that after each tablet is taken, the quantity of the drug in the body increases by 500 mg. Additionally, after each 8 hours, 80% of the remaining drug is eliminated.

So, the equation expressing [tex]\(Q_{n+1}\)[/tex] in terms of [tex]\(Q_n\)[/tex] is:

[tex]\[Q_{n+1} = 0.2 \times Q_n + 500\][/tex]

(c) In the long run, the quantity of the antibiotic in the body will stabilize when the amount of the drug taken in equals the amount eliminated.

Let's denote the long-term quantity of the antibiotic in the body as [tex]\(Q_{\text{long}}\).[/tex]

According to the equation derived in part (b), after each tablet is taken, the quantity of the drug in the body increases by 500 mg. However, after each 8 hours, 80% of the remaining drug is eliminated.

So, in the long run, [tex]\(Q_{\text{long}}\)[/tex] will stabilize when the amount taken equals the amount eliminated:

[tex]\[0.2 \times Q_{\text{long}} + 500 = 500\][/tex]

Solving for [tex]\(Q_{\text{long}}\):[/tex]

[tex]\[0.2 \times Q_{\text{long}} = 0\]\[Q_{\text{long}} = 0\][/tex]

Therefore, in the long run, no quantity of the antibiotic remains in the body.

The complete question is here:

A doctor prescribes a 500 mg antibiotic tablet to be taken every eight hours. It is known that the body eliminates 80% of the drug in eight hours. (a) How much of the drug is in the body just after the second tablet is taken? After the third tablet?

second tablet X mg

third tablet X mg in terms of

(b) If Q, is the quantity of the antibiotic in the body just after the nth tablet is taken, find an equation that expresses Qn + 1  in terms of Qn

(c) What quantity of the antibiotic remains in the body in the long run? mg

Why are invasive species dangerous to the environment?

Answers

many reasons....but mostly its because it throws the whole system out of wack....like when a new fish is brought to a area its not from...it eats all the fish that are native...but theres no predator that eats it..so then you have a problem....and other things like that.....hope that helps

Early detection, rapid response, and effective management strategies are crucial for mitigating the negative effects of invasive species and protecting native biodiversity and ecosystem functioning.

Disruption of Native Ecosystems: Invasive species often outcompete native species for resources such as food, water, and habitat. Loss of Native Species: Invasive species can directly impact native species through predation, competition, or by introducing diseases or parasites to which the native species have no natural defenses.

Habitat Degradation: Invasive species can cause significant changes to the physical environment. Altered Fire Regimes: Some invasive plant species are highly flammable and can alter fire regimes in ecosystems. Economic and Agricultural Impacts: Invasive species can have economic consequences by damaging crops, forests, fisheries, and other industries.

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Arabinose is a monosaccharide that
e. coli can use as an energy source. when both glucose and arabinose are present in the media,

Answers

When glucose and arabinose are present in the media
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