In the test for protein, why would some tubes show a slight purple color while others show a dark purple color?

Answers

Answer 1

Answer:

protein:

1. What is the name of the reagent used to test for the presence of proteins? (1 point)

           Biuret reagent  

2. What color indicates the presence of protein in a solution when the reagent is added? (1 point)  

When Biuret is added, it would turn blue when it is negative but if it is positive then it would turn to a purplish to a dark purple. Showing that there is protein.

                   

3. Which substances tested were positive for protein? (2 points)

The ones that were tested positive were milk solution and 50% egg solution.

4. Describe in your own words what we should do if the test tube for di-water tested positive for protein. (2 points)

Since Di water is our negative control, we know that there would be no proteins but if it was tested positive. Then we should start the experiment all over again this time with new, clean equipment.


Related Questions

What supports, protects and maintains the shape of the cell? *Very rigid. *
A .golgi apparatus
B. cytoplasm
C. endoplasmic reticulum
D. cell wall

Answers

Answer: D. the Cell wall

Explanation: The cell wall provides structural support and protection. Pores in the cell wall allow water and nutrients to move into and out of the cell. The cell wall also prevents the plant cell from bursting when water enters the cell.

Also it is also a ridged layer found outside of the cell membrane

I believe the answer is D

Which of these events breaks down rocks into smaller pieces? (4 points) Sedimentation Deposition Weathering Erosion​

Answers

Answer:

Weathering

Explanation:

Weathering is the breaking down or dissolving of rocks and minerals on Earth's surface. Once a rock has been broken down, a process called erosion transports the bits of rock and minerals away. Water, acids, salt, plants, animals, and changes in temperature are all agents of weathering and erosion.

HOPE IT HELPS. PLEASE MARK AS BRAINLIEST.

Answer: Weathering breaks down rocks into smaller pieces.

Explanation:

Outline how an enzyme can be immobilised in alginate.

Answers

An immobilized enzyme is an enzyme attached to an inert, insoluble material—such as calcium alginate (produced by reacting a mixture of sodium alginate solution and enzyme solution with calcium chloride). This can provide increased resistance to changes in conditions such as pH or temperature.

Organisms belonging to which kingdom are all autotrophs

Answers

Kingdom Plantae
Kingdom Plantae includes multicellular, autotrophic organisms. Except for a few species that are parasites, plants use photosynthesis to meet their energy demands. Kingdom Fungi includes multicellular and unicellular, heterotrophic fungi.




Give me brainliest please.

Water is always _________________ around the earth.

Answers

Answer:

Floating

Explanation:

MANE WHAT DIS IS IM LOST !!

Answers

Answer:

I'm not sure exactly what your supposed to do but a,b and c are all correct but d is false.

Why are proteins considered organic molecules?

a. They are very large molecules
b. They are macromolecules
c. They are made from many carbon atoms
d. They contain many oxygen atoms

Answers

Answer:

C. They are made from many carbon atoms

Explanation:

HELPPPP!! HELPPP!!! PLS PLS PLS!! ASAAAPPPP

Answers

I think the answer is D

4. What happens during fertilization that makes the offspring unique from the original cells?

Answers

Answer:

the dna pattern is different and gets its own dna strand and some of parents and parents combined

Explanation:

Gametes, which are half the number of chromosomes from the parent cells, fuse together. The haploid gametes becomes a zygote which are diploid cells, resulting to twice the number of chromosomes as the gametes. This process include meiosis and mitosis.

what is the similarities of infographic and article?​

Answers

Explanation:

Infographics have exploded in popularity in virtually every industry.

From digital marketing to schools and classrooms, infographics are being used everywhere to communicate complex information in a visually engaging way.

If you’re new to design and unsure about what infographics really are, this short guide is created just for you. In this article, I’ll help you understand:

The similarities between infographic and article include the following:

Infographics and articles both provide information about a particular field. Infographics and articles are both linear texts and this implies that a person needs to read them for the person to understand.

An article refers to a written composition about a particular topic. It can form a part of a book or publication. Articles are usually written by an expert in a particular field.

Infographic refers to graphic visual representations of knowledge and information that's intended to present information. Infographic is the collection of texts, and images to help the readers understand a particular topic.

Read related link on:

https://brainly.com/question/21960489

Information on Osmosis

Answers

Answer: OSMOSIS

Explanation:

Osmosis is when solvent molecules move through a selectively permeable membrane into a region of a higher solute concentration, so that it would equalize the solute concentration on both side. (THINK: water always goes to salt, never the other way around)

1. Inferring This activity incorporates information from Chapters 12
and 13. How are these two chapters related?

Answers

9 + 10 is not 21 got that?

what is it called when energy is required to move materials through a cell membrane ?

Answers

Answer:active transport

During active transport, ATP is required to move a substance across a membrane, often with the help of protein carriers, and usually against its concentration gradient. One of the most common types of active transport involves proteins that serve as pumps.

when we observe an organism or environment what are we observing A. changes B. similarities C. colors​

Answers

Answer:

II really have no idea but it might be A?

Explanation:

If I'm wrong I'm so sry T-T

Answer:

A. changes

Explanation:

i took the test and i got it correct trust me

The most important high-energy compound found in the human body is

A. DNA

B. UPS

C. ATP

D. GPA​

Answers

The answer is ATP Hope this helps and if you can mark as brainliest that would be great! :)

Please HELP!!!!!!!
Refer to the family pedigree shown here. In generation I, one parent is affected by the gene mutation and one parent isn't. In generation II, all three children are affected by the gene mutation. What can you conclude about this gene mutation?

Answers

Answer:

What can be concluded about this genetic mutation is that it is inherited as a dominant trait.

Explanation:

In the case that one of the parents has a mutation whose inheritance pattern is dominant —which is rare— all the descendants will have the same mutation, since this gene will necessarily be expressed.

A dominant allele is one whose presence produces the phenotypic expression of the characteristic it determines. When the mutation is dominant, it will always be expressed in the descendants.

Hungtinton's disease and achondroplasia are examples of mutations with an autosomal dominant inheritance pattern.

WILL GIVE BRAINLEIST
Which statement describes the movement of water when a cell shrinks and shrivels due to osmosis?


Water went into the cell because the concentration of water inside the cell was lower than the concentration outside the cell.

Water went out of the cell because the concentration of water inside the cell was higher than the concentration outside the cell.

The cell membrane used energy to move water into the cell through passive transport.

The cell membrane used energy to move water out of the cell through passive transport.What area on the Iberian Peninsula maintained independence after the Reconquista?

Answers

Answer:

Water went out of the cell because the concentration of water inside the cell was higher than the concentration outside the cell.

Explanation:

Answer:

b

Explanation:

what structure do plant have for making food that animals do not

Answers

Explanation:

Animal cells each have a centrosome and lysosomes, whereas plant cells do not. Plant cells have a cell wall, chloroplasts and other specialized plastids, and a large central vacuole, whereas animal cells do not

Plant cell haven walls

I need help please ?!!!!

Answers

Basically anything that isn’t moving has potential energy

(20 POINTS) how do the nucleus, ribosomes, endoplasmic reticulum, and the golgi apparatus all work together? write a sentence using all terms

Answers

The nucleus, ribosomes, endoplasmic reticulum, and the golgi apparatus work together by the nucleus sending tRNA out of the nuclear envelope, the ribosomes transfer these and the endoplasmic reticulum synthesizes the protein, the golgi apparatus packages these chemicals.

According to the Cell Theory, what is NOT one of the three main tenants?

1. viruses - which are not alive - not made of cells

2. The cell is the smallest living unit in all organisms

3. All living things are made of cells

4. All cells come from other pre-existing cells

Answers

1. Viruses, they are not related to Cell Theory

if a person laughs too much can they vomit out their intestine​

Answers

Answer:

no

Explanation:

they didn't vomit instead they cannot breath or not remember to breathe when a person laughs too much

Answer:

Not only vomiting out their Intestine

Laughing too much can kill you too....

What is a phenotype???

Answers

Answer:

the set of observable characteristics of an individual resulting from the interaction of its genotype with the environment.

A genotype is the genetic constitution of an individual organism.

Explanation:

A plant has been removed from its natural environment and placed into a body of water that contains a higher concentration of salt than the inside of each plant cell. The plant promptly wilts. This situation is most similar to which event?

a. Seaweed put into fresh water.
b. A land plant put into tap water.
c. A freshwater plant put into sea water.
d. A freshwater plant put into distilled water.

Answers

Answer:

Explanation:The situation that is most similar in which a plant is moved to a higher concentration of salt in water is that of a freshwater plant being put into sea water. Due to too much salt concentration, freshwater plants cannot survive on the ocean

why is deforestation a threat to Yellowstone National Park?​

Answers

Answer:

Deforestation causes loss of animal and plant species due to their lack of habitat. A huge portion of animals and plant species live in forests so if we take that away from them how are they supposed to survive? Not only does deforestation threaten species known to us, but also threatens species we haven't even discovered yet.

Explanation:

This isn't necessarily for Yellowstone but for all national parks ^

Deep-oceanic trenches are formed a subduction
Zones
at)
plate boundaries.
Divergent
Convergent
Transform
Pacific

Answers

Answer:

Convergent

Explanation:

In particular, ocean trenches are a feature of convergent plate boundaries, where two or more tectonic plates meet. At many convergent plate boundaries, dense lithosphere melts or slides beneath less-dense lithosphere in a process called subduction, creating a trench.

Answer:

Im pretty sure its convergent!

Explanation:

the property of a membrane where some substances can cross while others cant

Answers

The membrane is selectively permeable because substances do not cross it indiscriminately. Some molecules, such as hydrocarbons and oxygen can cross the membrane. Many large molecules (such as glucose and other sugars) cannot.

Urgent!!!! Worth 20 points!! Please help ASAP! It’s timed!! Only serious answers bad answers will be reported

Answers

It's a and d.
If treated with an acid they die.
And change in shape is Denaturing, because it means the enzym is being destroyed

I keep rolling my ankle and have pulled a muscle in the back of my leg, running Cross Country. WHAT SHOULD I DO? Can you help PLEASE?

Answers

Answer:

you should talk to the nearest adult asap

Answer:

Ice,Heat, or massoge

Explanation:

Try icing it if that doesnt help try putting something warm on it that should relax the muscle

try to massoging  it as well

Question 5
1 pts
The sugar created during photosynthesis is used as the foundation of the other
macromolecules the organism needs to survive and carry out its life's functions.
True
False

Answers

Answer:

True

Explanation:

Because without the sugar the plants need to grow we wouldnt have clean air clean air means no oxygen no oxygen means we all dead

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What is the approximate weight of a 400 kg object? Danielle put 4.902 gallons of gasoline in a gas tank. What is 4.902 written in expanded form? What do we call the molecule that forms when two atoms of the same element are covalently bonded to each other? Kindly help me with this question. (Chapter - Complex Numbers) A gas mixture contains HBr, NO2, and C2H6 at STP. If a tiny hole is made in the container, which gas will effuse fastest? NO2 C2H6 HBr They all effuse at the same rate. Which gas molecules have the highest average kinetic energy at this temperature? HBr NO2 C2H6 They all have the same average kinetic energy. What are the five categories of adaptations? What will require more energy? A. Typing a letter B. Vacuuming a floor What was the reasoning for the demonstration during the Chicano moratorium I rly need help, it's graded , Which of these was one of the generals ofthe South that made military leadership anadvantage for the Confederacy?A. General Francis PickensB. 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What is the elephant getting when the bond is broken in sucrose? (20)III. MANDATOS DE UD. y UDS.: Llene el espacio en blanco con el mandato apropiado: ej. ESTUDIEN (estudiar) Uds. los mandatos de Ud. y Uds.1. __________ (Escuchar)Uds. los anuncios del peridico, y _____________ (hacerlo)Uds. con cuidado.2. No________________ (servirnoslo) Ud. personalmente. _____________ (decirle) Ud. esto, por favor, a la camarera.3. ______________ (sentarse) Uds. aqu. No ____________ (ir) Uds. a la oficina.4. No________________ (sacar)Ud. el telfono mientras comemos.No_____________ (jugar) Uds. los video-juegos ahora.5. ____________(pensar) Ud. bien. ____________ (saber)Ud. lo que tiene que hacer.(20)IV. EL PRESENTE DEL SUBJUNTIVOIndica el presente de subjuntivo de estos verbos:ej. 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Te sugiero que t______________ (PASAR) la aspiradora.8. Nos ruegan que nosotros _______________(LEER) el documento.9. No queremos que Uds. _____________ (HABLAR) al official.10. Prefiero que t ______________ (VIAJAR) a Cuba.(3.5) VI. PREGUNTA ESCRITA: CONTESTAR UNA ORACIN COMPLETA:ej.Adnde quiere tu familia que t vayas para las vacaciones?_________________________________________________________________________________________________(3.5)VII. PREGUNTA ORAL: CONTESTAR POR ESCRITA:ej. Quin prefieres que sustituya a John Lewis ahora?______________________________________________________________________________________________