Biology in Human Welfare Online Test

Introduction of food plants developed by genetic engineering is not desirable because
there is danger of entry of viruses and toxins with introduced crop
this method is costly
these products are less tasty as compared to the already existing products
economy of developing countries may suffer
What is the step pH of soil for cultivation of plants?
5.6 - 6.5
4.5 - 8.5
6.5 - 7.5
3.4 - 5.4
The new varieties of plants are produced by
selection and intro
introduction and mutation
mutation and selection
selection and hybridization
The first transgenic crop was
Cotton
Tobacco
Flax
Pea
Lathyrism which is caused by consumption of kesridal is a disease characterised by
gross skeletal deformation and thinning of collagen fibres and fibrils
mental retardation, delay in the onset of puberty and cardiovascular abnormalities
retardation of body growth, precocious puberty and renal dysfunction
reproductive failure, susceptibility to diabetes mellitus and skeletal abnormalities
The reason why vegetatively reproducing crop plants are best suited for maintaining hybrid vigour is that
they can be easily propagated
they are more resistant to diseases
they have a longer life span
once a desired hybrid has been produced there are few chances of losing it
The use of Cannabis products (bhang , ganja, charas, marijuana or hashish) causes
stimulates the nervous system and increases alterness and activity.
suppresses brain function and relieves pain
alters thoughts, perceptions and feelings
depression of brain activity and feeling of calmness
Which of the following is likely to be achieved in the coming two decades?
Production of biodegradable plastic rather than cellulose by higher plants
Correction of genetic basis of diabetes mellitus
Control of cancer
A complete understanding of the brain– mind interaction
Two microbes found to be very useful in genetic engineering are
Escherichia coli and Agro bacterium tumefaciens
Crown gall bacterium and Caenorhabditis elegans
Diplococcus sp. and pseudomonas sp.
Vibrio cholerae and a tailed bacteriophage
Farmers in a particular region were concerned that pre- mature yellowing of leaves of a pulse crop might cause decrease in the yield. Which treatment could be most beneficial to obtain maximum seed yield?
Frequent irrigation of the crop
Application of iron and magnesium to promote synthesis of chlorophyll
Removal of all yellow leaves and spraying the remaining green leaves with 2,4,5- trichlorophenoxy acetic acid
Treatment of the plants with cytokinins along with a small dose of nitrogenous fertilizer
Crop plants grown in monoculture are
low in yield
highly prone to pests
characterised by poor root system
free from intraspecific competition
In order to obtain virus- free plants through tissue culture the best method is
Protoplast culture
Meristem culture
Anther culture
Embryo rescue
The world’s highly prized wool yielding ‘Pashmina’ breed is:
Kashmir sheep- Afghan sheep cross
goat- sheep cross
sheep
goat
The name of Norman Borlaug is associated with :
Blue Revolution
Yellow Revolution
Green Revolution
White Revolution
An important step in the manufacture of pulp for paper industry from the woody tissues of plants is the:
removal of water from the wood by prolonged heating at approximately 50°C
removal of oils present in the wood by treatment with suitable chemicals
treatment of wood with chemicals that break down cellulose
preparation of pure cellulose by removing lignin
Three crops that contribute maximum to global food grain production are:
Rice, maize and sorghum
Wheat, maize and sorghum
Wheat, rice and barley
Wheat, rice and maize
Which one thing is not true about antibiotics?
Some persons can be allergic to a particular antibiotic
Each antibiotic is effective only against one particular kind of germ
First antibiotic was discovered by Alexander Flemming
The term “antibiotic” was coined by Selman Waksman in 1942
The technique of obtaining large number of plantlets by tissue culture method is called
Macro propagation
Micro propagation
Organ culture
Plantlet culture
Golden rice is a transgenic crop of the future with the following improved trait:
high vitamin-A content
high protein content
high lysine (essential amino acid) content
insect resistance
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This test covers the questions from Biology for AIPMT

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