Multiple Choice QuestionsA polygenic inheritance in human beings is
Skin colour
Sickle cell anaemia
Colour blindness
Phenylketonuria
Biological Oxygen Demand (BOD) is a measure of
Industrial wastes poured into water bodies
The extent to which water is polluted with an organic compound
Amount of carbon monoxide inseparably combined with haemoglobin
Amount of oxygen needed by green plants during the night
The Montreal Protocol refers to
Persistent organic pollutants
Global warming and climate change
Substances that deplete the ozone layer
Biosafety of genetically modified organisms
C.
Substances that deplete the ozone layer
World's major producers and consumers of pollutants met at Montreal (Canada) on September 16, 1987 to solve the problem of ozone thining in stratosphere. 24 countries signed the protocol that came into force on january 1, 1989. This protocol refers to the substances such as CFCs (chlorofluorocarbons), methane that deplete the ozone layer.
The Okazaki fragments in DNA chain growth
Results in transcription
Polymerise in the 3' to 5' direction and forms replication fork
Prove semi-conservative nature of DNA replication
Polymerise in the 5' to 3' direction and explain 3' to 5 DNA replication
One gene-one enzyme relationship was established for the first time in
Neurospora crassa
Salmonella typhimurium
Escherichia coli
Diplococcus pneumoniae
In gymnosperms, the pollen chamber represents
A cell in the pollen grain in which the sperms are formed
A cavity in the ovule in which pollen grains are stored after pollination
An opening in the megagametophyte through which the pollen tube approaches the egg
The microsporangium in which pollen grains develop
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