Multiple Choice QuestionsThe following figure given below is a diagrammatic representation of organismic response to abiotic factors. What do (a), (b) and (c) represent respectively?
(A) Conformers (B) Regulators (C) Partial regulators
(A) Regulators (B) Partial regulators(C) Conformers
(A) Partial regulators (B) Regulators (C) Conformers
(A) Partial regulators (B) Conformers (C) Regulators
(A) Partial regulators (B) Conformers (C) Regulators
Select the correct statement
Phosphorus cycle is an example of gaseous nutrient cycle
The pyramid of biomass in sea is generally inverted
By the process of humification, soluble inorganic nutrients go down into the soil horizon
A given organism may not occupy more than one trophic level simultaneously
A given organism may not occupy more than one trophic level simultaneously
The rate of biomass production and the rate of production of organic matter during photosynthesis are called respectively
Total productivity, primary production
Gross primary productivity, gross secondary productivity
Net primary productivity, secondary productivity
Net productivity, gross secondary productivity
Net productivity, gross secondary productivity
Allen's rule applies to
Tribes living in high altitudes
Mammals from colder climates
Fish living in Antarctic waters
Desert lizards
Desert lizards
Pick out the correct option from (a) to (e)
(A) Primary succession begins in areas where natural communities have been destroyed
(B) Hydrarch succession takes place in water
(C) The climax community is the community that is in near equilibrium with the immediate environment
(D) In newly cooled lava secondary succession occurs
(A) and (B) are correct, (C) and (D) are incorrect
(B) and (C) are correct, (A) and (D) are incorrect
(A) and (D) are correct, (B) and (C) are incorrect
(B) only is correct, (A), (C) and (D) are incorrect
(B) only is correct, (A), (C) and (D) are incorrect
Select the wrong statement
The presence of chromogenic substrate gives blue colour colonies, if the plasmid in the bacteria does not have an insert
Retroviruses in animals have the ability to transform
normal cells into cancerous cells
In microinjection, cells are bombarded with high velocity microparticles of gold or tungsten coated with DNA
Since DNA is a hydrophilic molecule it cannot pass through cell membranes
Since DNA is a hydrophilic molecule it cannot pass through cell membranes
C.
In microinjection, cells are bombarded with high velocity microparticles of gold or tungsten coated with DNA
Bacteria can be transformed in the following ways–
(i) By microinjections - where in DNA can be injected directly into the nucleus of cells to be transformed by using a micropipette. This technique was originally used in animal cells but has subsequently been applied to plant cells.
(ii) Gene gun/biolistic guns - Microscopic particles of gold or tungsten are coated with the DNA of interest & bombarded onto cells. This technique is known as biolistics.
Which of the following organisms breeds only once in lifetime?
Bamboo
Oysters
Pelagic fishes
Birds
Birds
Select the wrong statement
Human insulin is being commercially produced from a transgenic species of Escherichia coli.
The genetically modified bacillus thuringiensis is used as biopesticide on the commercial scale
Human protein, alpha-1 -antitrypsin is used to treat emphysema
The first transgenic cow, Rosie, produced alpha lactalbumin, enriched milk
The first transgenic cow, Rosie, produced alpha lactalbumin, enriched milk
Which one of the following is used extensively in biochemical and genetic work?
Saccharomyces
Aspergillus
Claviceps
Penicillium
Penicillium
Which one of the following is considered important in the development of seed habit?
Homospory
Heterospory
Dependent sporophyte
Free living gametophyte
Free living gametophyte
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