Question

1. gel electrophoresis can be used to

seperate molecules by

a. size

b. length

c. charge

d. all of the above

2. List at least 2 differences between DNA and RNA

3. If one DNA strand has the followng sequnce, what is the sequence of the sister strand of DNA? ATGTCCAGT

4. What is DNA isolation?

a. the rupturing of the DNA molecule

b. the moving of DNA from one cell to another

c. the extraction of DNA from viruses or cells

d. copying of the DNA molecule

e. measuring the DNA molecule for transport

Answer 1

question 1

Gel electrophoresis is a laboratory method used to separate mixtures of DNA, RNA, or proteins according to molecular size and charge. Using electrophoresis, we can see how many different DNA fragments are present in a sample and how large they are relative to one another.

d. all of the above

question 2

DNA (deoxyribonucleic acid) is the genomic material in cells that contains the genetic information used in the development and functioning of all known living organisms. RNA, is another macromolecule essential for all known forms of life. Like DNA, RNA is made up of nucleotides.

question 3

In DNA, there are four nitrogenous base options: adenine (A), thymine (T), cytosine (C) and guanine (G). Each base can only bond with one other, A with T and C with G. This is called the complementary base pairing rule or Chargaff's rule.

so, ATGTCCAGT sister strand of this sequence will be

TACAGGTCA

question 4

The ability to extract DNA is of primary importance to studying the genetic causes of disease and for the development of diagnostics and drugs.

option c) the extraction of DNA from viruses or cells

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