To test for protein, you added Biuret solution and observed color changes. Suppose that the color data below was observed.

A 3-column table has 1 rows. The first column is labeled Gelatin (+ control) with entry pink/purple. The second column is labeled
Water (negative control) with entry pink/purple. The third column is labeled Mystery food sample with entry blue.

The data above indicate an error. How do you know? What might have caused the error?

Answers

Answer 1

Answer:

When tested for proteins neither gelatin or water was not pink/purple

Explanation:

credit to person who commented on question above

Answer 2

Answer:

The water should not be pink/purple because water should test negative for protein. The water should actually have turned blue, because Biuret solution is blue. Someone may have mislabeled the test tube with water. The water may have been contaminated with a protein.


Related Questions

All of the following affect the temperature at which magma forms except what?

Answers

Viscosity is the only one that doesn’t affect the temperature at which magma forms

Except viscosity, all the other factors affect the temperature at which magma forms. Therefore, the correct option is D.

What is viscosity?

Viscosity can be defined as a measure of the fluid's resistance to flow. Magma can be defined as a very hot molten or semi-molten substance that is formed due to volcanic eruptions. They are responsible for the formation of the igneous rocks.

There are many factors that affect the temperature at which magma forms:

Pressure-increasing pressure can raise the melting temperature of rocks, while decreasing pressure can lower it.Composition of source material: The composition of the rocks in the mantle can vary depending on the location and geological history of the region. Presence of water: Water can lower the melting point of rocks, which can lead to the formation of magma.

But viscosity does not play any role in impacting the temperature at which magma forms. Therefore, the correct option is D.

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The question is incomplete, but most probably the complete question is,

All the following affect the temperature at which magma forms EXCEPT

A. pressure

B. composition of source material

C. water

D. viscosity

What is the usual CORRECT pairing of DNA? Look closely at the picture to figure it out.

A. T-C and G-A

B. C-G and A-T

Answers

Answer:

B. C-G and A-T

Explanation:

The pairings are adenine and thymine and cytosine and guanine

Answer:

B. C-G and A-T

Explanation:

It is cytosine and guanine, & adenine and thymine. So, option (B) is correct.

Why are whales closer related to giraffes than tuna?

A. Whales and giraffes are both mammals.

B. Tuna live in water but they are fish and not mammals.

C. Both of these are correct.

Answers

Answer:

Hey mate.....

Explanation:

This is ur answer.....

A. Whales and giraffes are both mammals.

Hope it helps!

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Answer:

C. Both of these are correct.

Explanation:

Whales are the artiodactyls a group of hoofed mammals that includes deer, pigs, giraffes, camels and hippos.

The ability of an individual organism to survive and reproduce is known as its___

Answers

Answer:

Fitness of the induvitual

Explanation:

Sorry if am wrong

What ideas were changing in the scientific community at the time of Darwin's travels? How might those new ideas influenced Darwin?

Answers

Answer and Explanation:

At the time of Darwin's travels, the scientific community was beginning to abandon ideas linked to creationism to adopt more scientific and testable concepts, less linked to religiosity. Darwin was very influenced by these new concepts and decided to study a way to apply them to the biological diversity that planet earth presented. He wanted to explain this diversity through scientific data, obtained by experiments and logical reasoning, without the interference of creationist concepts and that would show how life on earth changes over the years and how species of living beings were created. This was one of the kicks that made him start his travels and his studies on biological evolution.

Which of the following is NOT one of Darwin's conditions for natural selection to occur?

Answers

Answer:b

Explanation:


What elements are in the most common substance in the human body?
A. Carbon and nitrogen
B. Hydrogen and oxygen
C. Oxygen and phosphorus
D. Calcium and nitrogen

Answers

B hydrogen and oxygen

Where in the digestive system might 2 protease enzymes be produced?????

Pls help

Pls
Please me give all my points

Answers

Explanation:

Proteases

Region of digestive system Enzyme Where produced

Stomach Protease - pepsin Gastric glands in stomach

Small intestine - Duodenum Protease - trypsin Pancreas

Small intestine - Ileum Protease - peptidase Wall of ileum

A student combined equal amounts of two solutions one solution has a pH of 2 and the other has a pH of 12 which would most likely be the resulting pH? 1,3,6,11

Answers

Answer:

It would be 6

Explanation:

Because high hydrogen concentration plus high hydroxyl concentration forms a neutral solution.

Describe volant adaptational features of birds.​

Answers

Answer:

Volant adaptation refers to the adaptations done by those animals which have an aerial mode of life or spend most of their time flying. ... -forelimbs modified into wings to help flying. -body covered with feathers. -light weight hollow bones filled with air ( pneumatic bone).

The tube in the penis where sperm exits is

Answers

Answer:

The vas deferens transports mature sperm to the urethra in preparation for ejaculation.

Answer:   testes

Explanation:

Sperms are made in testes.

Seed tray can be used for sowing of cucumber seeds ______

True or false​

Answers

Answer:

true

Explanation:

You can germinate cucumber seeds by direct seeding into a garden bed or in the soil in a seed tray.

Lamarck's ideas on evolution were adopted by some Russian scientists, includingLysenko. Russian textbooks printed Lysenko's assertionthat workmen who develop strong muscles from working in the mines would produce children who would be born stronger. Which of the major elements of evolution by natural selection is violated by this assertion

Answers

Answer:

The acquired characteristics are inherited.

Explanation:

Lamarck was a French naturalist and biologist. Lamarck was considered to be the early proponent who occurred the biological evolution. He was will known all over the world as early evolutionists.

Lamarck believed that the living things grow directly in the upward direction from a simple to a more complex form.

In the context, the ideas on the evolution were adopted by the Russian scientist which includes Lysenko. The Russian textbooks printed the assertion of Lysenko assertion that workmen develops a strong muscles those who are working in the mines that would produce strong children.

Bu this assertion, it violated the acquired characteristics that are inherited.

pls help me i really need help as fast as possible 50 pts!!!!!!!!!!

Answers

Explanation:

the reason this mouse shows natural selection is that the black mouses are more adapted to their environment compared to the tan mouses as the tan mouses are more easily spotted and eaten by the bird. since the black mouse is more adapted to it's environment it is more likely to live on and pass it's trait of the black fur color to it's offspring while the tan mouses are not.

a increase in breathing rate can be triggered by an increase in the carbon dioxide containing in the blood. the increase in breathing rate is caused by a mechanism called​

Answers

when there is high concentration of co2 in our body then respiratory centre ( medulla and pons) get activated and it increase rate of respiration which decreases co2 concentration

The apneustic (stimulating) and pnuemotaxic (limiting) centers of the pons work together to control rate of breathing.

What is medulla?

Medulla is defined as the lowest part of the brain and the lowest portion of the brainstem. The medulla oblongata is connected by the pons to the midbrain and is continuous posteriorly with the spinal cord, with which it merges at the opening (foramen magnum) at the base of the skull.

The medulla sends signals to the muscles that initiate inspiration and expiration and controls nonrespiratory air movement reflexes, like coughing and sneezing.

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The
store(s) more carbon than the atmosphere.
trees
soil
Oceans
rock

Answers

The oceans store more carbon than the atmosphere. Thus, the correct option is C.

What is Atmosphere?

An atmosphere may be defined as an area that is surrounded by layers of gases across a planet or other celestial body.

The oceans are a gigantic carbon sink, and the domain of the positive authorization of the greenhouse gas cycle is that, as the oceans become warmer, they tend to discharge more carbon dioxide disbanded in the water.

Therefore, the correct option for this question is C.

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how can a mutation in a gene affect the traits an organism has

Answers

Answer:

Genetic variations that alter gene activity or protein function can introduce different traits in an organism. If a trait is advantageous and helps the individual survive and reproduce, the genetic variation is more likely to be passed to the next generation (a process known as natural selection).

Explanation:

hope this helps...........

Answer:

The gene will code for a different protein than it should.

Explanation:

Atividade de Português

Answers

Answer:

1- C

2-

3- C

4- C

Explanation:

Methane is a powerful greenhouse gas. Which of the following is NOT a
source of methane?
O melting of methane hydrates
O decay of living things/landfills
O increased evaporation
O cow farts

Answers

Answer:

increased evaporation.

Explanation:

there is no methane in or near the process of evaporation.

hope this helps

why is studying climate change a scientific challenge? ( please be specific and
go into depth)

Answers

Answer:

Climate change is already happening: temperatures are rising, drought and wildfires are starting to occur more frequently, rainfall patterns are shifting, glaciers and snow are melting and the global mean sea level is rising. These ever-changing trends mean that scientists have to be well acquainted with all this which requires a great deal of understanding and patience.

The political interests in research often limit the results and many a time misleading

Data for climate research is in many instances difficult to access, often at a price, and according to the source and type of data, the formats for retrieval can be very different. In addition, data may not be available for the same time and space scales. There is often an incompatibility between socio-economic and physical data, both necessary for climate modeling efforts because data collection is generally carried out by different agencies for different purposes. This means scientists have to analyze this data as useful and then research on it.

Explanation:

Pls vote my answer as brainliest

state the effect of weather on humans activity​

Answers

Answer:

This will help you alot in understanding.

Can someone explain to me?

Answers

Answer:

You are supposed to find the messed up gene(s) and find out what disorder or disease that messed up gene(s) makes

Explanation:

What prevents blood from circulating backward in veins?
A.valves
B. capillaries
C. lungs
D. heart

Answers

Answer:

A.Valves

Explanation:

The pulmonary vein empties oxygen-rich blood from the lungs into the left atrium. As the atrium contracts, blood flows from your left atrium into your left ventricle through the open mitral valve. When the ventricle is full, the mitral valve shuts. This prevents blood from flowing backward into the atrium while the ventricle contracts.

Which feature do viruses have in common with animal cells?
Production of energy by a mitochondrion
0 Existence of lipids in cell membranes
O Presence of a genetic code in nucleic acid
O Ability to form proteins at the ribosomes

Answers

Existing of lipids in cell membrane

Which is a positive effect of the technological advance of going from a
compass to a GPS?

Answers

Answer:

The positive effect of the application of a GPS over a compass is that one can get success in getting to his or her desired location. A GPS can inform about the exact location, and when it is combined with a map, it makes the person reach straight to where he or she desires to go

One reason why anabolic steroids can imitate the hormone testosterone is because
(1) anabolic steroids and testosterone both interact with the same cell receptors
(2) testosterone acts only on muscle cells
(3) females produce small amounts of the hormone testosterone
(4) an increase in testosterone in males using anabolic steroids increases male features

Answers

Answer:it’s 4 (an increase in testosterone in males unsung anabolic steroids increases male features

Explanation:

Anabolic steroids can imitate the hormone testosterone is because they both interact with the same cell receptors.

What do you mean by anabolic steroids?"Anabolic steroids are synthetic (man-made) versions of testosterone."It is used to enhance physical appearance by increasing muscle mass and decreasing fat.What is testosterone?"Testosterone is the male s ex hormone that is made in the testicles."It helps in regulating male s exual development and functions.What are cell receptors?"Structures found in the plasma membrane (surface) of cells that tightly bind specific molecules."It functions in information transmission.

The anabolic steroids interact with same cells receptors as that of testosterone and results in increase of testosterone level causing increase in muscle mass.

Hence, the correct option is 1. anabolic steroids and testosterone both interact with the same cell receptors.

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How do antibodies fight pathogens

Answers

Answer:

1) Antibodies are secreted into the blood and mucosa, where they bind to and inactivate foreign substances such as pathogens and toxins (neutralization).

2) Antibodies activate the complement system to destroy bacterial cells by lysis (punching holes in the cell wall).

1. Written additive inverse of
a. 2/5
b.-6/9​
2 .find the multiple inverse of
a. 1/2
b. -3/4
c. 0
d. 9/5
e. 1
pls answes me this all

Answers

1. A. -2/5
B. 6/9

2.a. 2
B. -4/3
C.0
D.5/9
E1

Nutrients in excessive amounts enter water systems, causing algal bloom.

Answers

Answer: Nutrient pollution is caused when too many nutrients, primarily nitrogen and phosphorus, are added to water bodies. The excess nutrients act as fertilizers, causing excessive algae  growth. It is common for nutrients to run off the land in urban areas, where lawn and garden fertilizers are used.

Explanation:

I explained in the top-

Hope it helps if it doesn't then whooops

Answer:

good question very good

The use of coal to generate electricity in a power plant can often appear to be the least expensive option, but only if the environmental impacts of burning coal are not accounted for. Select the option that best describes some of the environmental impacts of using coal for electricity generation A. Air pollution resulting from burning coal B. Erosion and water pollution from mining operations C. Both A and B are correct D. Neither A nor B are correct

Answers

Answer:

C. Both A and B are correct

Explanation:

Coal is one of the important fuel for the generation of electric energy in the steam generator. Coal is mined from the coal mines and is fed into the steam generator to produce steam that is used to generate electricity.

The mining of coal can affect the environment nearby as it destroys the forest cover or trees nearby. It leads to erosion and water pollution. Also the carbon emission from the burning of the coal releases harmful pollutants inn the atmosphere which causes air pollution.

Thus both options (A) and (B) are correct.

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