Molecular biology

Nucleic acid copy number: practice problems

Work out the result for nucleic acid copy number. Every answer here is computed by the same tested calculator the rest of the site uses, so a solution can never drift away from the maths.

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Problem 1 Nucleic acid copy number

Work out the result for nucleic acid copy number.

  • Length: 2500
  • Value: 0.5
Show the answer and the working

That is 1.825e+8 copies/µL.

  1. MW: 2500 residues · 660 g/mol = 1650000 g/mol
  2. Copies/µL: conc · 6.022e14 / MW = 1.825e+8

Open this in the calculator to change the numbers.

Problem 2 Nucleic acid copy number

Work out the result for nucleic acid copy number.

  • Length: 1000
  • Value: 0.5
Show the answer and the working

That is 4.562e+8 copies/µL.

  1. MW: 1000 residues · 660 g/mol = 660000 g/mol
  2. Copies/µL: conc · 6.022e14 / MW = 4.562e+8

Open this in the calculator to change the numbers.

Problem 3 Nucleic acid copy number

Work out the result for nucleic acid copy number.

  • Length: 4000
  • Value: 1
Show the answer and the working

That is 2.281e+8 copies/µL.

  1. MW: 4000 residues · 660 g/mol = 2640000 g/mol
  2. Copies/µL: conc · 6.022e14 / MW = 2.281e+8

Open this in the calculator to change the numbers.

Problem 4 Nucleic acid copy number

Work out the result for nucleic acid copy number.

  • Length: 2000
  • Value: 1
Show the answer and the working

That is 4.562e+8 copies/µL.

  1. MW: 2000 residues · 660 g/mol = 1320000 g/mol
  2. Copies/µL: conc · 6.022e14 / MW = 4.562e+8

Open this in the calculator to change the numbers.

Problem 5 Nucleic acid copy number

Work out the result for nucleic acid copy number.

  • Length: 7500
  • Value: 3
Show the answer and the working

That is 3.650e+8 copies/µL.

  1. MW: 7500 residues · 660 g/mol = 4950000 g/mol
  2. Copies/µL: conc · 6.022e14 / MW = 3.650e+8

Open this in the calculator to change the numbers.

Problem 6 Nucleic acid copy number

Work out the result for nucleic acid copy number.

  • Length: 7500
  • Value: 1.5
Show the answer and the working

That is 1.825e+8 copies/µL.

  1. MW: 7500 residues · 660 g/mol = 4950000 g/mol
  2. Copies/µL: conc · 6.022e14 / MW = 1.825e+8

Open this in the calculator to change the numbers.

Problem 7 Nucleic acid copy number

Work out the result for nucleic acid copy number.

  • Length: 1000
  • Value: 1.5
Show the answer and the working

That is 1.369e+9 copies/µL.

  1. MW: 1000 residues · 660 g/mol = 660000 g/mol
  2. Copies/µL: conc · 6.022e14 / MW = 1.369e+9

Open this in the calculator to change the numbers.

Problem 8 Nucleic acid copy number

Work out the result for nucleic acid copy number.

  • Length: 5000
  • Value: 1
Show the answer and the working

That is 1.825e+8 copies/µL.

  1. MW: 5000 residues · 660 g/mol = 3300000 g/mol
  2. Copies/µL: conc · 6.022e14 / MW = 1.825e+8

Open this in the calculator to change the numbers.

Problem 9 Nucleic acid copy number

Work out the result for nucleic acid copy number.

  • Length: 1000
  • Value: 1
Show the answer and the working

That is 9.124e+8 copies/µL.

  1. MW: 1000 residues · 660 g/mol = 660000 g/mol
  2. Copies/µL: conc · 6.022e14 / MW = 9.124e+8

Open this in the calculator to change the numbers.

Problem 10 Nucleic acid copy number

Work out the result for nucleic acid copy number.

  • Length: 4000
  • Value: 3
Show the answer and the working

That is 6.843e+8 copies/µL.

  1. MW: 4000 residues · 660 g/mol = 2640000 g/mol
  2. Copies/µL: conc · 6.022e14 / MW = 6.843e+8

Open this in the calculator to change the numbers.

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