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31.

In positive regulation which of these genes are involved:

A.	Promotor	B.	Regulator
C.	Operator	D.	None of these

32.

Promotor gene is stimulated to interact with RNA polymerase on interacting with:

A.	CAP - cAMP	B.	ATP
C.	CMP	D.	None of these

33.

Which of these in operon inhibits transcription of mRNA on combining with repressor protein:

A.	Regulator gene	B.	Promotor gene
C.	Both (a) & (b)	D.	None of these

34.

In negative regulation which of these gene of operon is involved:

A.	Promotor	B.	Regulator
C.	Operator	D.	All of these

35.

In eukaryotes the regulation of genes involves:

A.	Chromosomal proteins	B.	Chormones
C.	Both (a) & (b)	D.	None of these

36.

Linkage was first suspected by:

A.	Bateson and Punnet	B.	Sutton and Boveri
C.	Beadle and Tatum	D.	All of these scientists

37.

Chromosomal theory of linkage was given by:

A.	Miescher	B.	Mendel
C.	Muller	D.	Morgan

38.

In test cross between hybrids of F1 generation of gray body long winged and black body vestigial winged parents Morgan found which of these ratios:

A.	1:1:1:1	B.	25:25:25:25
C.	46:37:8:9	D.	None of these

39.

Linkage is:

A.	Tendency of two genes to remain together during process of inheritance	B.	Tendency of two individual to remain together
C.	Tendency of two different chromosomes to remain together	D.	None of these

40.

Crossing over which means an exchange of segments between members of a homologous pair of chromosomes occurs during:

A.	Amitosis	B.	Mitosis
C.	Meiosis	D.	None of these