PHOSPHORUS CYCLE Question Preview (ID: 59218)


PHOSPHORUS CYCLE TEST.

. Which one of the following is a major constituent of biological membranes, nucleic acids, and cellular energy transfer systems?
a) POTASSIUM
b) PHOSPHORUS
c) SELENIUM
d) COBALT

Which of the following component is used to make shells, bones, and teeth by animals?
a) PHOSPHORUS
b) SODIUM
c) GALLIUM
d) ARGON

Who is the natural reservoir of phosphorous?
a) ATMOSPHERIC GASES
b) WATER
c) DEAD ORGANISMS
d) ROCKS

Which element is not released during respiration in the atmosphere?
a) NITROGEN
b) COBALT
c) CARBON
d) PHOSPHORUS

How is the gaseous exchange of phosphorus between organisms and the environment?
a) MAXIMUM
b) MODERATE
c) NEGLIBIBLE
d) NO EXCHANGE

Which one of the following is the simplified sequence of phosphorus cycling in a terrestrial ecosystem?
a) Soil → Producers → Rock minerals → Consumers → Decomposers
b) Rock minerals → Soil → Producers → Consumers → Decomposers
c) Rock minerals → Decomposers → Producers → Consumers
d) Decomposers → Rock minerals → Consumers → Producers

How do herbivores and other animals obtain phosphorous?
a) SOIL
b) ROCKS
c) WATER
d) PLANTS

Which of the biochemical cycle is without an atmospheric component?
a) NITROGEN CYCLE
b) OXYGEN CYCLE
c) PHOSPHORUS CYCLE
d) CARBON CYCLE

Which of the following is a major constituent of DNA and RNA?
a) CALCIUM
b) COBALT
c) SELENIUM
d) PHOSPHORUS

Which biogenetic element is obtained from crystalline rocks?
a) ARGON
b) HELIUM
c) PHOSPHORUS
d) MAGNESIUM

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