Molecular Basis of Inheritance · Question 105

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

In eukaryotic cell transcription, RNA splicing and RNA capping take place inside the -

1. Dictyosomes
2. Ribosomes
3. Nucleus
4. ER

Which one of the following statements about the particular entity is true?

1. Nucleosome is formed of nucleotides
2. Centromere is found in animal cells, which produces aster during cell division
3. The gene for producing insulin is present in every body cell
4. DNA consists of a core of eight histones