Question

A strand of DNA is 2.5 nanometers. Convert this to meters.

a) 2.5 x 10⁻9 meters
b) 2.5 x 10⁻7 meters
c) 2.5 x 10⁻8 meters
d) 2.5 x 10⁻6 meters

Answer 1

a) 2.5 x 10⁻9 meters

Step-by-step explanation:

Conversion to meters=

2.5 nanometers/1×10 to the power of 9 nanometers/meter

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Answer 2

To convert 2.5 nanometers to meters, multiply by 10⁻⁹, which gives 2.5 × 10⁻⁹ meters as the correct answer.

Step-by-step explanation:

If a strand of DNA is 2.5 nanometers (nm) long, we can convert this to meters by recalling that 1 nanometer is equivalent to 1 × 10−9 meters. Therefore, to convert nanometers to meters, we multiply by 10−9. So, the length of the DNA strand in meters is:

2.5 nm × 10−9 meters/nanometer = 2.5 × 10−9 meters.

The correct answer to the question is:

a) 2.5 × 10−9 meters.