DNA precipitation out of a mixture of biomolecules can be achieved by treatment with
Chilled ethanol
Methanol at room temperature
Chilled chloroform
Isopropanol
Purines found both in DNA and RNA are
Adenine and guanine
Guanine and cytosine
Cytosine and thymine
Adenine and thymine
Match the following genes of the Lac operon with their respective products :
| A. i gene | (i) β-galactosidase |
| B. z gene | (ii) Permease |
| C. a gene | (iii) Repressor |
| D. y gene | (iv) Transacetylase |
Select the correct option
A - (iii); B - (i); C - (ii); D - (iv)
A - (iii); B - (i); C - (iv); D - (ii)
A - (iii); B - (i); C - (i); D - (ii)
A - (i); B - (iii); C - (ii); D - (iv)
Which of the following features of genetic code does allow bacteria to produce human insulin by recombinant DNA technology?
Genetic code is redundant
Genetic code is nearly universal
Genetic code is specific
Genetic code is not ambiguous
