Home
Class 11
CHEMISTRY
The earliermethod for determining the mo...

The earliermethod for determining the molecular weight of proteins was based on chemical analysis. The following composition of proteins were found :
Haemoglobin: 0.335% Fe
Cytochrome protein: 0.376% Fe
Peroxidase enzyme : 0.29% Se
How many atoms of Se are present in 1 pg of peroxidase enzyme assuming one molecule of enzyme contains 1 atom of Se (at. mass of Se = 78.96) ?

A

`2.21 xx 10^(7)`

B

`4.52 xx 10^(14)`

C

`3.82 xx 10^(21)`

D

`2.23 xx 10^(6)`

Text Solution

Verified by Experts

The correct Answer is:
B
Mol. Mass of peroxidase `=(1 xx 78.96 xx 100)/0.29`
=27228
No. of atoms in 1 `mug = (27228)/(6.022 xx 10^(23)) xx 10^(-4)`
`=4.52 xx 10^(14)`
Promotional Banner

Topper's Solved these Questions

  • SOME BASIC CONCEPTS OF CHEMISTRY

    MODERN PUBLICATION|Exercise COMPETITION FILE (INTEGER TYPE AND NUMERICAL VALUE TYPE QUESTIONS)|10 Videos

  • SOME BASIC CONCEPTS OF CHEMISTRY

    MODERN PUBLICATION|Exercise COMPETITION FILE (MULTIPLE CHOICE QUESTIONS WITH MORE THAN ONE CORRECT ANSWERS)|8 Videos

  • S-BLOCK ELEMENTS ( ALKALI AND ALKALINE EARTH METALS )

    MODERN PUBLICATION|Exercise UNIT PRACTICE TEST|13 Videos

  • STATES OF MATTER : GASES AND LIQUIDS

    MODERN PUBLICATION|Exercise UNIT PRACTICE TEST|13 Videos

Similar Questions

Explore conceptually related problems

The earliermethod for determining the molecular weight of proteins was based on chemical analysis. The following composition of proteins were found : Haemoglobin: 0.335% Fe Cytochrome protein: 0.376% Fe Peroxidase enzyme : 0.29% Se How many moles of iron are present in 1 mg of haemoglobin (assuming a molecule of haemoglobin contains 4 Fe atoms)?

The earliermethod for determining the molecular weight of proteins was based on chemical analysis. The following composition of proteins were found : Haemoglobin: 0.335% Fe Cytochrome protein: 0.376% Fe Peroxidase enzyme : 0.29% Se The mole % of Se in the enzyme peroxidase is (at. mass of Se = 78.96)

The earliermethod for determining the molecular weight of proteins was based on chemical analysis. The following composition of proteins were found : Haemoglobin: 0.335% Fe Cytochrome protein: 0.376% Fe Peroxidase enzyme : 0.29% Se If the cytochrome protein contains one atom per molecule then the molecular mass of protein is

The earliermethod for determining the molecular weight of proteins was based on chemical analysis. The following composition of proteins were found : Haemoglobin: 0.335% Fe Cytochrome protein: 0.376% Fe Peroxidase enzyme : 0.29% Se If haemoglobin contains 4 atoms of iron, then approximate molecular mass of haemoglobin is (at. mass of Fe = 55.85)

The percentage of Se in peroxides enzyme is 0.5% by mass (atomic mass of Se = 78.4 amu). Then , the minimum molecular mass of enzyme which contains not more than one Se atom is

A peroxidase enzyme contains "2%" selenium "(Se=80)" .The minimum molecular weight of the enzyme is

Percentage of Se in peroxidase anhydrase enzyme is 0.5% by weight (at. Wt. =78.4) , then minimum molecular weight of peroxidase anhydrase enzyme is: