Well allliving organisms contain genetic information, stored in DNA and RNA molecules,which directs the functions of cells.
The general coding and structureof these molecules is universally shared by all organisms. Questions about theorigin of these molecules are fundamental to our understanding of the origin oflife on Earth.
Experimentslike the one conducted by Miller and Urey demonstrated that organic moleculescould have formed spontaneously in Earth's early atmosphere, and smallermolecules could bond together to build large organic molecules. Somescientists hypothesize that some of the first large organic molecules to formand self-replicate were RNA molecules, with DNA molecules forming much later. This is called the RNA worldhypothesis.
These early RNA molecules were probably smaller than the RNAmolecules in our cells today. They would have contained the codes for buildingspecific protein molecules from the amino acids present on Earth at that time.Proteins are necessary components of all living cells.
It means that all of us- every living creature- was built off the same genetic code.
Answer:
Biuret reagent is the correct answer.
Explanation:
Biuret reagent is used to test the presence of the protein in a solution.
The biuret solution contains
Biuret reagent is a solution that is blue in color and when it reacts with protein the color gets a change to pink-purple due presence of several peptide bonds and when there is no protein present in the solution the color remains blue.
The biuret reaction takes place when the copper II ions placed in the solution as a cupric sulfate gets reduce to copper I ions due to the presence of peptide bonds and the color change is observed from blue to violet.
The biuret reagent is used to test for proteins. A biuret test, also known as a peptide bond test, is a chemical test used to measure the number of peptide bonds present in an analyte.
Biuret reagent consists of NaOH (sodium hydroxide) and hydrochlorofluorocarbons (sulfate) and potassium sodium tartrate. The tartrate is added to the chelate to stabilize the cupric ions.
When pure, the reagent is a pale blue color. However, when the reagent is mixed with protein, the reaction results in a light purple color. The deep blue/purple color is caused by a copper ion complex with a protein amide group.
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Answer:
the explanation is
Explanation:
A.platelets helps in blood clotting
B.red blood cells help in transporting oxygen to all parts of the body and is used to remove CO2 from the body
C.White blood cells help in fighting against diseases and bacteria
-diamond
-topaz
-quartz
Talc is the mineral which can be scratched with a fingernail and is therefore denoted as option A.
This is a mineral which consists of elements such as the following listed below and is often used as lubricants.
Fingernail is stronger which is why it can be scratched by it unlike the other minerals mentioned in the options.
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O proteins
O amino acids
O lipids
O steroid hormones