Question

Please answer neatly and please remember this is grade 12 biology!! Thank you The average length...

Please answer neatly and please remember this is grade 12 biology!! Thank you

The average length of a nucleotide is 0.34 X 10 -9 m and there are 6 X 109 base pairs in a human diploid cell. If there are approximately 5.0 X 1013 cells in a mature human and the distance to the sun is approximately 1.5 X 1011 m, determine how many times the DNA from one human could reach the sun and return. Show the math for full marks.

Homework Answers

Answer #1

The average length of a nucleotide = 0.34 X 10-9 m

No. of base pairs in a human diploid cell = 6 X 109

Total number of cells in a mature human = 5.0 X 1013 (approx.)

Distance that can be covered if the DNA from all cells is opened up from end to end = (0.34 X 10-9) X (6 X 109) X (5.0 X 1013) = 1.7 X 1013 m.

Distance between the sun and earth = 1.5 X 1011

Since we have to travel back the actual distance = 2 X 1.5 X 1011 = 3 X 1011

Therefore, the required number of times the DNA from one human could reach the sun and return = (1.7 X 1013 ) / (3 X 1011) = 56.67

Since, the question has asked for the number of times we can reach the sun and return, it should be a whole number and the answer should be just 56 ignoring the decimal point.

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