Tag: carbon cycle

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Questions Related to carbon cycle

Multiple choice zoology bio-geo chemical cycles in nature nutrient cycles- flow of substances carbon cycle biogeochemical cycles - gaseous

Proportion of CO consumption consists of basic components:

  1. The leaf boundary layer

  2. The stomata

  3. Radiation exchange

  4. All of Above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The consumption of carbon dioxide by plants is influenced by various factors including the leaf boundary layer, stomatal conductance, and the energy balance (radiation exchange).

Multiple choice zoology bio-geo chemical cycles in nature nutrient cycles- flow of substances carbon cycle biogeochemical cycles - gaseous

Carbon dioxide constitutes about 0.03% of the atmosphere

  1. By volume

  2. By weight

  3. By mass

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The air in our atmosphere is composed of molecules of different gases. The most common gases nitrogen  (78%), oxygen (about 21%), argon (almost 1%) and carbon dioxide (0.03%). Other molecules are present in  the atmosphere as well, but in very small quantities. Composition of air is measured in percent by volume,  at sea level at 15C and 101325 Pa.

Multiple choice zoology bio-geo chemical cycles in nature nutrient cycles- flow of substances carbon cycle biogeochemical cycles - gaseous

Phtotochemical phase does not includes ________________.

  1. Fixation of ${CO} _{2}$
  2. Release of ${O} _{2}$

  3. Photolysis of water

  4. Formation of ATP and NADPH
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Photochemical phase includes photolysis of water and production of assimilatory power (ATP and NADPH). It liberates O2  during photolysis of water. 

The photochemical phase do not include fixation of CO2.

Multiple choice zoology bio-geo chemical cycles in nature nutrient cycles- flow of substances carbon cycle biogeochemical cycles - gaseous

Chemical reactions triggered by ___________ transforms the organic material into hydrocarbons.

  1. solar energy

  2. hydroelectric

  3. elevated temperatures

  4. decomposition
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The formation of hydrocarbons from organic matter (kerogen) in sedimentary rocks occurs through a process called catagenesis, which is driven by elevated temperatures and pressures over geological time.

Multiple choice biology biogeochemical cycles carbon cycling mineral coal carbon cycle

Which one of the following statements regarding CO gas is correct ?

  1. It is produced by the complete combustion of fossil fuels.

  2. It combines with haemoglobin to form carbamino-haemoglobin.

  3. It impairs oxygen transport resulting in giddiness, headache, asphyxia and even death.

  4. All of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Carbon monoxide ( CO ) is produced due to incomplete combustion of fossil fuels, metallurgical operations, automobile emission, cigarette smoking. CO combines with haemoglobin, produces carboxyhaemoglobin which impairs oxygen transport resulting in headache, decreased vision, cardiovascular disease, asphyxia.