1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
julia-pushkina [17]
3 years ago
7

Which explains the basis of the Biuret test? a. Under base conditions, copper ions bind to the amino groups of proteins and chan

ge color. b. Iodine fits into the coils of starch polymers and changes color. c. A blue dye binds to protein and changes color.d. Sudan III dye binds to lipids and changes color.

Chemistry
2 answers:
nasty-shy [4]3 years ago
7 0

Answer:Answer: Under base conditions, copper ions bind to amino groups of proteins and change colour.

Explanation: Biuret test is a general test for detecting the presence of a peptide bond in a compound. It is a test for proteins. Amino acids are joined together in proteins by peptide bonds. Copper ions from blue alkaline solution of CuSO4 react with amino groups of proteins to give a violet colored complex called a biuret compound

Ugo [173]3 years ago
3 0

Answer:A

Explanation:

In the Biuret test, the copper ions bind covalently to the amino groups as shown in the image to form a violet complex. This violet complex is responsible for the colour change as shown

You might be interested in
What is the pH of a 0.40 M solution of C6H5COOH?
melomori [17]
What are the answer choices?
4 0
3 years ago
Consider the reaction between hydrogen gas and chlorine gas to form hydrogen chloride gas in a closed cylinder with a movable pi
d1i1m1o1n [39]

Answer:

In this case, the system doesn't be affected by the pressure change. This means that nothing will happen

Explanation:

We can answer this question applying the Le Chatelier's Principle. It says that changes on pressure, volume or temperature of an equilibrium reaction will change the reaction direction until it returns to the equilibrium condition again.

The results of these changes can define as:

Changes on pressure: the reaction will move depending the quantity of moles on each side of the reaction

Changes on temperature: The reaction will move depending on if it's endothermic or exothermic

Changes on volume: The reaction will move depending the limit reagent  and the quantity of moles on each side of the reaction

In the exercise, they mention a change on pressure of the system at constant temperature (that means the temperature doesn't change). As Le Chatelier Principle's says, we must analyze what happens if the pressure increase or decrease. If pressure increase the reaction will move on the side that have less quantity of moles, otherwise, if the pressure decreases the reaction will move to the side that have more quantity of moles. In this case, we can see that both sides of the equation have the same number of moles (2 for the reactants and 2 for the products). So, in this case, we can conclude that, despite the change on pressure (increase or decrease), nothing will happen.

3 0
2 years ago
Decribe how hydrogen and oxygen form water
rewona [7]

Well, its a very simple process actually. Here is how it works;

When molecular hydrogen, also known as H2, and oxygen, also known as O2, are combined and are able to react together, energy is released and the molecules of the hydrogen and the oxygen. These can combine to form either water or hydrogen peroxide, depending on how the chemicals mix.

I hope I made your day a little easier,

Have a great day and happy Halloween!

8 0
2 years ago
Type the correct answer in each box.
Luba_88 [7]

Answer:  The weight of the object on earth =441N

Weight of the object on moon = 72N

6 0
3 years ago
Write the ions present in a solution of K2CO3. Express your answers as chemical formulas separated by a comma. Offset subscripts
meriva

Answer:

K ^+ , CO3 ^2-

Explanation:

The compound is potassium trioxocarbonate(IV).

It contains cation (potassium ion) and acid radical ( trioxocarbonate (IV) ion).

Since K is in group 1 of the periodic table, it loses one electron to form ion i.e K^1. trioxocarbonate IV ion has a charge of 2-.and so the ions of the compound are as shown in the answer above.

8 0
2 years ago
Other questions:
  • A gas storage tank has a volume of 3.5 X 105 L when the temperature is 27oC, and the pressure is 101 kPa. What is the new volume
    11·1 answer
  • In a Lewis structure for carbon tetrachloride (CCl4), which of the following is the central atom?
    14·1 answer
  • aluminum has a density or 2.7g/cm3. copper has a density of 8.96/cm3. which metal would you choose to build a model airplane?
    5·1 answer
  • Which of the following is NOT a unit used to measure temperature?
    15·1 answer
  • If there were an element above fluorine in the periodic table what phase would you expect it to be in (at room temp)?
    6·1 answer
  • Given 1 cm3 = 1 mL<br> A box has dimensions 2.0 cm x 4.0 cm x 8.0 cm.
    9·1 answer
  • A small helium tank measures about two feet high. Yet it can fill over 50 balloons! How can such a small tank contain enough hel
    9·1 answer
  • Which of the following is a norm or value that sports may socialize children about
    6·1 answer
  • How are monosaccharides different from disaccharides?
    10·2 answers
  • If you have 25 pieces of bread and 9 pieces of turkey and a turkey
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!