List of top Biology Questions on Regulation of Gene Expression

Match List I with List II:

List I		List II
A	Two or more alternative forms of a gene	I	Back cross
B	Cross of F1 progeny with homozygous recessive parent	II	Ploidy
C	Cross of F progeny with any of the parents	III	Allele
D	Number of chromosome sets in plant	IV	Test cross

Choose the correct answer from the options given below:

In an E. coli strain the i gene gets mutated and its product can not bind the inducer molecule. If the growth medium is provided with lactose, what will be the outcome?

Rop-gene which codes for the proteins involved in the replication of the plasmid pBR322 in E.coli is located at restriction site of

Match the following with respect to meiosis:

	Column I		Column II
A	Bt cotton	I	Gene therapy
B	Adenosine	II	Cellular defence deaminase deficiency
C	RNAi	III	Detection of HIV infection
D	PCR	IV	Bacillus thuringiensis

The specific palindromic sequence which is recognized by EcoRI is:

In an Organism, mutation in a single gene exhibits multiple phenotypic expressions. Identify the underlying genetic mechanism in the above instance.

When Escherichia coli cells are cultured in a medium where Lactose is absent, the 'i' gene of Lac Operon continues to produce repressor mRNA, because it is

In eukaryotes, the entire base sequence of a gene do not appear in mature RNA because

Identify the event in meiosis mediated by the enzyme recombinase.

AGGTATCGCAT is a sequence from the coding strand of a gene. What will be the corresponding sequence of the transcribed mRNA ?

All of the following are part of an operon except

Select the correct match :

The term "gene" was introduced by:

Spliceosomes are not found in cells of

In lac-operon concept of gene expression, allolactose acts as,

Which one of the following is wrongly matched?

Which enzyme/s will be produced in a cell in which there is a nonsense mutation in the lac Y gene ?

A sequential expression of set of human gene occurs when steroid molecule binds to the

The first mammal clone "Dolly" was created by

The inducer for switching ??n??the lac operon in bacteria is:

Represser protein is produced by

The lac operon consists of

The sequence of structural gene in lac operon concept is

Removal of micronucleus in Paramoecium will impair the function of

E. coli cells with a mutated $Z$ gene of the lac operon cannot grow in medium containing only lactose as the source of energy because