18030.Satellite DNA is useful tool in
Genetic engineering
Organ transplantation
Sex determination
Forensic science
18031.What does "lac" refer to in what we call the lac operon?
Lactose
Lactase
Lac insect
The number 1,00,000
18032.Molecular scissors which cut DNA at specific site is
Pectinase
Polymerase
Restriction endonuclease
Ligase
18033.Enzymes called ______ add complementary nucleotides, floating inside the nucleus.
DNA polymerase
DNA synthetase
Lipoprotein lipase
None of these
18034.If the total amount of adenine and thymine in a double-stranded DNA is 45%, the amount of guanine in this DNA will be
22.5%
27.5%
45%
55%
18036.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
They cannot synthesize functional beta galactosidase
They cannot transport lactose from the medium into the cell
The lac operon is constitutively active in these cells
In the presence of glucose, E. coli cells do not utilize lactose
18037.The one aspect which is not a salient feature of genetic code, is its being
Specific
Degenerate
Ambiguous
Universal
18039.In history of biology, human genome project led to the development of?
Bioinformatics
Biosystematics
Biotechnology
Biomonitoring
18040.The segment of DNA which acts as the instrumental manual for the synthesis of the protein is
Nucleoside
Nucleotide
Ribose
Gene
18041.The primary control of gene expression takes place at the level of
Translation
Transcription
DNA-replication
None of the above
18042.Which one of the following does not follow the central dogma of molecular biology?
HIV
Pea
Mucor
Chlamydomonas
18043.The organelles in the cell where protein synthesis occurs are ______.
Ribosomes
Endoplasmic reticulum
Nucleus
mRNA
18044.HIV is classified as a retrovirus because its genetic information is carried in
DNA instead of RNA
DNA
RNA instead of DNA
Protein coat
18045.Okazaki is known for his contribution to the understanding of
Transcription
Translation
DNA replication
Mutation
18046.A DNA segment which serves as a kind of “on-off switch" for transcription is a/an ______.
Regulator gene
Operator
Promoter
Structural gene
18047.DNA sequence that code for protein are known as
Introns
Exons
Control regions
Intervening sequences
18048.Removal of RNA polymerase III from nucleoplasm will affect the synthesis of
mRNA
rRNA
tRNA
hnRNA