Short DNA molecules with known base sequences used for recognition of restriction fragments are called ___________.

Name the technique used for the separation of DNA fragments.

DNA molecules of plastids are called.

In a DNA molecule distance between two bases is _

The four nitrogen base sequences which form the code words for DNA language are :

Fill up the blanks with correct answer(s)./Correct the underlined portion of the sentences. The process of separating DNA fragments is called _______electrophoresis.

Fill up the blanks: DNA fragments on lagging strand are called _________ fragments.

How many fragments will be generated if you digest a linear DNA molecule with a restriction enzyme having four recognition sites on the DNA? (a) 3 (b) 6 (c) 5 (d) 4

The figure shows the restriction enzyme cutting sites (R1-R3) in wild type (n) and mutant (n) gene. If a radioactively labelled probe (that hybridises at a sequence close to R1) is used for detecting the presence of DNA fragments after gel electrophoresis and Southern blotting, which of the following band patterns will yout expect ? Note : L1 : wild type DNA, L2: mutant DNA

Use of certain chemicals and radiation to change the base sequences of genes of crop plants is termed