The lac operon is an example of
Arabinose operon
Inducible operon
Repressible operon
Overlapping genes
The usual method of DNA replication is
Replication
Dispersive
Transcription
Semi-conservative
Restriction endonucleases are
Used in vitro DNA synthesis
Used in genetic engineering for ligating two DNA molecules
Synthesized by bacteria as a part of their defense mechanism
Present in mammalian cells for degradation of DNA when the cell dies
Which of the following typical stage is known for DNA replication?
Metaphase
G1 phase
S-phase
G2-phase
The chemical knives of DNA are
Ligases
Polymerases
Endonucleases
Transcriptases
DNA consist of two complementary nucleotides chains. It the sequence of nucleotides in one of the chain is AGCTTCGA, then the nucleotides sequence in the other chain shall be
TAGCATAT
GATCCTAG
TCGAAGCT
GCTAAGCT
Which of the following is initiating codon in eukaryotes?
UAG
AGU
GAU
AUG
In DNA helix, cytosine, is paired with guanine by
Covalent bound
Phosphate bond
Two hydrogen bonds
Three hydrogen bonds
Initiation codon is
UGA
UAA
