Answer: Four fragments with Ala-Leu as residues
Explanation:
A protein is a word that describes any of numerous large, complex naturally-produced molecules composed of one or more long chains of amino acids (also called Polypeptide) in which the amino acid groups are held together by peptide bonds.
Long peptides making up a can be cut into smaller fragments by using certain chemical reagents or enzymes that cuts it at specific sites leaving amino acid residues. Proteolytic enzyme too can be used to cleave peptides in a process called proteolysis. Example of such enzyme is Trypsin and it makes cut at the carboxyl group of arginine and lysine unless its followed by proline.
One of such chemical reagent as mentioned above include the Cyanogen Bromide written as CNBr that cleaves proteins after methionine (Met) side chains.
This chemical usually cleave the amino acid methionine at the carboxyl terminal.
From the above protein sequence using CNBr the number of peptide fragments formed after cleaving with cyanogen bromide is 4.
Asp-Ser-Arg-Leu-Ser-Lys-Thr-Met;
Tyr-Ser-Ile-Glu-Ala-Pro-Ala-Lys-Leu-Asp-Trp-Glu-Gln-Asn-Met ;
Ala-Leu Asp-Ser-Arg-Leu-Ser-Lys-Thr-Met;
Tyr-Ser-Ile-Glu-Ala-Pro-Ala-Lys-Leu-Asp-Trp-Glu-Gln-Asn-Met;
With Ala-Leu as residues.
Proteolysis simply involve the hydrolysis of proteins into peptides and amino acids; in this context but especially as part of the digestion of food.
1 moles -------- 6.02x10²³ atoms
?? moles ----- 7.4x10²¹ atoms
moles = 7.4x10²¹ / 6.02x10²³
= 0.01229 moles
hope this helps!
1. The atomic number deceases by one and the atomic mass is unchanged - β⁺/positron emission. In this a proton is converted to a neutron, hence no net change in mass. Since a proton is converted to neutron, the daughter nuclide's proton number /atomic number decreases by 1. Then atomic number decreases by 1 and no change in mass.
2.the atomic number decreases by two, and the atomic mass decreases by four - alpha decay / ⁴₂α. alpha particles have 2 neutrons and 2 protons. Since 2 protons and 2 neutrons are emitted, the mass of the nuclide decreases by 4. Since 2 protons have been emitted, this results in atomic number decreasing by 2.
3.<span>the atomic number increases by one, and the atomic mass remains unchanged. - </span>β⁻ beta decay. In this type of decay - beta decay , a neutron is converted to a proton, therefore no net change in mass. Since a proton is formed, atomic number increases by 1. Therefore atomic number increases by 1 and no change in mass.
Answer:
2.4 x 1027 g
Explanation:
the mass of 1 mole of brick is 2.4 x 1027 g.
Answer:
detail is given below.
Explanation:
The charged particles of nucleus are protons while neutrons are neutral having no charge.
We know that an atom consist of electrons, protons and neutrons. Neutrons and protons are present inside the nucleus while electrons are present out side the nucleus. Electron has a negative charge and is written as e⁻. The mass of electron is 9.10938356×10⁻³¹ Kg . While mass of proton and neutron is 1.672623×10⁻²⁷Kg and 1.674929×10⁻²⁷ Kg respectively.
Symbol of proton= P⁺
Symbol of neutron= n⁰
The number of electron or number of protons are called atomic number while mass number of an atom is sum of protons and neutrons.
one proton contribute 1 amu to the total weight. There are 20 protons and 20 neutrons in Ca thus its atomic mass is 40 amu.
While the atomic number is 20.