3 years ago

Explain the role that restriction enzymes and gel electrophoresis play in DNA profiling.

1 answer:

3 0

Restriction enzymes are used in DNA profiling because they cleave DNA molecules at or near a specific sequence of bases that are called restriction sites. Gel electrophoresis is a method of separating DNA and RNA and proteins based on molecular sizes. It works by pushing the molecules with an electric field through a gel that has pores that separates them.

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A mile is equivalent to 1.6 km. When you are driving at 60 miles per hour, what is your speed in meters per second?

yKpoI14uk [10]

FIrst, just write down what we know :)

1. 1 mile = 1.6klm
2. There are 3600 seconds in an hr (60s x 60mins = 3600).

Now to get to meters per second (m/s) we need to first work out meters per hr (simply convert miles to klm and then multiply by 1000).

60 x 1.6 = 96 klm/hr x 1000 = 96,000 meters/hr

Now we know this, we can simply divide the meters per hr by how many seconds there are in 1hr to get meters per second:

96000 / 3600 = 26.67m/s

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3 years ago

which chemical formula shows how atoms of the elements calcium (ca) and sulfur (s) would join together ionically? a.cas b.ca2s c

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Calcium ions have a +2 charge and sulfur ions have a -2 charge, so the formula is CaS

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4 years ago

Rocks are classified as sedimentary igneous or metamorphic primarily based upon differences in their

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The differences in their formations. Igneous is formed by cooled and crystallized rock, sedimentary is formed by sediment compaction and cementation, and metamorphic is formed by intense heat and pressure.

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