Molecular Basis of Inheritance

Removal of introns and joining of exons in a defined order during transcription is called

1. Looping
2. Inducing
3. Slicing
4. Splicing

If one strand of DNA has the nitrogenous base sequence as ATCTG, what would be the complementary RNA strand sequence

1. ATCGU
2. UAGAC
3. AACTG
4. TTAGU

Which one of the following is not a part of a transcription unit in DNA ?

1. The structural gene
2. The inducer
3. A terminator
4. A promoter

Removal of RNA polymerase-III from nucleoplasm will affect the synthesis of

1. tRNA
2. hnRNA
3. rRNA
4. mRNA

PCR and Restriction Fragment Length Polymorphism are the methods for

1. Genetic transformation
2. Genetic fingerprinting
3. Study of enzymes
4. DNA sequencing

The unequivocal proof of DNA as the genetic material came from the studies on a:

1. Viroid
2. Bacterium
3. Fungus
4. Bacterial virus

Which one of the following also acts as a catalyst in a bacterial cell?

1. 5S rRNA
2. snRNA
3. hnRNA
4. 23S rRNA

What are those structures that appear as 'beads-on-string' in the chromosomes when viewed under electron microscope ?

1. Nucleosomes
2. Genes
3. Nucleotides
4. Base pairs

The 3'-5' phosphodiester linkages inside a polynucleotide chain serve to join -

1. One nucleotide with another nucleotide
2. One nitrogenous base with pentose sugar
3. One nucleoside with another nucleoside
4. One DNA strand with the other DNA strand

The lac operon consists of -

1. Three regulatory genes and three structural genes
2. Four regulatory genes only
3. Two regulatory genes and two structural genes
4. One regulatory gene and three structural genes