Multiple Choice QuestionsIn India, the organisation responsible for assessing the safety of introducing genetically modified organisms for public use is
Indian Council of Medical Research (ICMR)
Council for Scientific and Industrial Research (CSIR)
Genetic Engineering Appraisal Committee (GEAC)
Research Committee on Genetic Manipulation (RCGM)
The correct order of steps in Polymerase Chain Reaction (PCR) is
Extension, Denaturation, Annealing
Annealing, Extension, Denaturation
Denaturation, Annealing, Extension
Denaturation, Extension, Annealing
All monerons
Contain DNA and RNA
Demonstrate a long circular strand of DNA, not formed enclosed in a nuclear membrane
Are bacteria
All of the above
Skin colour is controlled b
Single gene
3 pairs of genes
2 pairs of genes
2 pairs of genes with an intragene
In DNA, when AGCT occurs, their association is as per which of the following pair
A-G, C-T
A-T, G-C
A-C, G-T, A-C, E-T
All of these
A segment of DNA has 120 adenine and 120 cytosine bases. The total number of nucleotides present in the segment is
60
240
120
480
Gel electrophoresis is used for
Cutting of DNA into fragments
Separation of DNA fragments according to their size
Construction of recombinant DNA by joining with cloning vectors
Isolation of DNA molecule
Polysome is formed by
Several ribosomes attached to a single mRNA
Many ribosomes attached to a strand of endoplasmic reticulum
A ribosome with several sub-units
Ribosomes attached to each other in a linear arrangement
A.
Several ribosomes attached to a single mRNA
In prokaryotes, ribosomes attach to the 5' end of mRNA as soon as transcription begins. A bunch of ribosome moves along a single mRNA molecule adding 15 amino acids/second to the polypeptide chain, almost the same speed at which RNA Polymerase transcribes the mRNA. The group of ribosomes together with the single mRNA molecules, they are translating is called polysome. The use of polysomes is advantageous to a cell since the overall rate of protein synthesis is increased compared to the rate that would occur if there were no polysomes.
In eukaryotic cells, the ribosomes are attached to rough endoplasmic reticulum by ribophorin protein. Electron microscopy reveals that membranes of homogenised endoplasmic reticulum disrupt to form closed vesicles called microsomes. Microsomes derived from rough endoplasmic reticulum are studied with ribosomes and are called rough ribosomes.
The product of biotechnology is
transgenic crops (GM crops)
humulin
biofertilizer
All of the above
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