Question

1. Ethidium bromide has long been used for visualizing DNA. How does this molecule bind to DNA?

a. Binds between histone molecules

b. Binds to the nucleotide base

c. Intercalates between the bases

d. Binds to the phosphodiester backbone

2. What types of cells do we count using a hemocytometer?

a. Yeast cells

b. Human cells

c. Bacterial cells d2

d. Virus particles

e. A and B

f. All of the above

3. Which of the following is most often used for the separation of nucleic acids?

a. polyacrylamide gel electrophoresis

b. agarose gel electrophoresis

c. Northern blotting

d. Southern blotting

e. all of the above

Answer 1

1)CORRECT OPTION IS C, it intercalates between the bases and forms van der vaal forces in the hydrophobic region of the dna

2)CORRECT OPTION IS F

hematocytometer can count all types of cells, though in the beginning it was used to count the blood cells, but as of now it is taken into practice for all of the cells

3)CORRECT OPTION IS E

here all of the above mentioned techniques can be used to separate dna nucleic acid. in the above mentioned techniques, all of them are separated on the basis of dna fragments and are separated by charge and mass ratio