In negative regulation which of these gene of operon is involved:
A.Promotor
B.Regulator
C.Operator
D.All of these
Category: Cytogenetics Mcqs
Genes are made up:
A.Histones
B.Polynucleotides
C.Hydrocarbons
D.Lipoproteins
Dr. Khorana got Nobel Prize for his researches on:
A.Hormones
B.Immunology
C.Genetic Code
D.None of these
Beads in chromosomes are formed by:
A.DNA molecule taking one turn
B.DNA molecule taking two turn
C.RNA molecule taking one turn
D.RNA molecule taking two turn
Chromosomes are made up of:
A.DNA and RNA
B.RNA and proteins
C.DNA, RNA and proteins
D.None of these
Nucleic acid was discovered by:
A.Miescher
B.Sutton
C.Khorana
D.Beadle
A zygote has which of these number of chromosomes:
A.x
B.2x
C.3x
D.4x
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
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
Sperms do not have histones but they have
A.A basic protein protamine
B.Acid protein spermin
C.Acid protein protamine
D.None of these
