Scale & Quantity
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5 Terms
How many base pairs do most DNA molecules contain?
Most DNA molecules contain thousands to millions of base pairs.
How long is a typical human chromosome in base pairs?
On average, a human chromosome contains about 1.5 × 10^8 nucleotide pairs (150,000,000 base pairs).
Convert 1.5 × 10^8 into standard decimal notation.
1.5 × 10^8 = 150,000,000 (one hundred fifty million).
If one chromosome’s DNA were stretched out, about how long would it be?
About 4 cm long when fully stretched out.
Why is it surprising that chromosome DNA can be several centimetres long?
Because the cell nucleus diameter is only a few micrometres — the DNA length is thousands of times larger than the nucleus diameter yet fits inside due to packing.