All of the following are part of an operon except
an operator
structural genes
a promoter
an enhancer
D.
an enhancer
Thalassemia and sickle cell anemia are caused due to a problem in globin molecule synthesis. Select the correct statement
Both are due to a qualitative defect in globin
chain synthesis
Both are due to a quantitative defect in globin chain synthesis
Thalassemia is due to less synthesis of globin molecules
Thalassemia is due to less synthesis of globin molecules
Many ribosomes may associate with a single mRNA to form multiple copies of a polypeptide simultaneously. Such strings of ribosomes are termed as
Polysome
Polyhedral bodies
Nucleosome
Plastidome
Which of the following pairs is wrongly matched?
Starch synthesis in pea: Multiple alleles
ABO blood grouping: Co-dominance
T.H. Morgan: Linkage
XO type sex determination: Grasshopper
The experimental proof for semiconservative replication of DNA was first shown in a
Fungus
Bacterium
Virus
Plant
If there are 999 bases in an RNA that codes for a protein with 333 amino acids, and the base at position 901 is deleted such that the length of the RNA becomes 998 bases, how many codons will be altered?
1
11
33
33
Which of the following is true for nucleolus?
Larger nucleoli are present in dividing cells
It is a membrane-bound structure
It is a site for active ribosomal RNA synthesis
It takes part in spindle formation
AGGTATCGCAT is a sequence from the coding strand of a gene. What will be the corresponding sequence of the transcribed mRNA?
AGGUAUCGCAU
UGGTUTCGCAT
UCCAUAGCGUA
ACCUAUGCGAU
Which of the following is commonly used as a vector for introducing a DNA fragment in human lymphocytes?
Retrovirus
Ti plasmid
pBR 322
λ phage
Select the correct match
Ribozyme - Nucleic acid
F2 × Recessive parent - Dihybrid cross
G. Mendel - Transformation
T.H. Morgan - Transduction