Tag: carbon cycling

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Questions Related to carbon cycling

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.

Multiple choice biology biogeochemical cycles carbon cycling mineral coal carbon cycle

If the carbon atoms fixed by producers already have passed through three species, the tropic level of the last species would be.

  1. Scavenger

  2. Tertiary producer

  3. Tertiary consumer

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

If the carbon atoms fixed by producer already have passed through three species then the trophic level of the last species(i.e., third species) would be tertiary consumer.
Producers $\rightarrow 1^o$ consumers $\rightarrow 2^o$ consumers $\rightarrow 3^o$ consumers.

Multiple choice biology ecology carbon cycling mineral coal carbon cycle

Which of the following is the largest reservoir of carbon?

  1. Soil

  2. Atmosphere

  3. Ocean

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

In the ocean, there are underwater sediments and sediment rocks of carbonate like in the form of limestone, dolomite etc. Thus, the correct answer is option C.

Multiple choice biology ecology carbon cycling mineral coal carbon cycle

How does photosynthesis help to maintain the percentage of oxygen and carbon dioxide in the atmosphere?

  1. By giving off carbon dioxide and absorbing oxygen

  2. By giving off oxygen and absorbing carbon dioxide

  3. By releasing oxygen and carbon dioxide

  4. By absorbing oxygen and carbon dioxide.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

During photosynthesis, carbon dioxide is fixed to form carbohydrate by the dark reaction. The water molecules are broken down during the light reaction and release oxygen. Thus, the two process helps to maintain the balance of oxygen and carbon dioxide in the atmosphere.

So, the correct answer is option B.

Multiple choice biology ecology carbon cycling mineral coal carbon cycle

Biochemical cycle with gaseous phase is

  1. Carbon

  2. Sodium

  3. Phosphorus

  4. Magnesium
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Carbon is a gaseous cycle because it circulates through the atmosphere primarily as carbon dioxide. Elements like sodium, phosphorus, and magnesium are sedimentary cycles with no significant gaseous phase.

Multiple choice biology biogeochemical cycles carbon cycling mineral coal carbon cycle

Which of the following gases has role an important in maintaining atmospheric temperature?

  1. Nitrogen

  2. Oxygen

  3. Argon

  4. Carbon dioxide
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Carbon dioxide is a greenhouse gas that traps heat in the atmosphere, playing a critical role in maintaining the Earth's temperature. Nitrogen and oxygen are the primary components of air but do not have the same greenhouse effect.

Multiple choice biology biogeochemical cycles carbon cycling mineral coal carbon cycle

Major 'reservoirs' of $CO _{2}$ are:

  1. Land, water, plants

  2. Fossil fuel, soil, , oceans

  3. Volcanic Eruption

  4. Deforestation
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Carbon is stored in major reservoirs including the atmosphere, oceans, soil, and fossil fuels. These act as sinks or sources for carbon exchange.

Multiple choice biology biogeochemical cycles carbon cycling mineral coal carbon cycle

Affinity of hemoglobin for CO is two hundred times more considerable than

  1. $O _{2}$
  2. $CO _{2}$

  3. Sox

  4. Nox
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Carbon monoxide (CO) binds to hemoglobin with an affinity approximately 200 to 250 times greater than that of oxygen (O2), which is why CO poisoning is so dangerous.

Multiple choice biology biogeochemical cycles carbon cycling mineral coal carbon cycle

The carbon cycle is the movement of carbon on Earth by the processes of --- and ---- .

  1. Plants and animals

  2. Respiration and photosynthesis

  3. Breathing in and breathing out

  4. Oxygen and carbon dioxide
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Carbon exists in the atmosphere as the compound carbon dioxide. It first enters the ecological food web when photosynthetic organisms, such as plants and certain algae, absorb carbon dioxide through tiny pores in their leaves. The plants then "fix" or capture the carbon dioxide and are able to convert it into simple sugars like glucose through the biochemical process known as photosynthesis. Plants store and use this sugar to grow and to reproduce. Thus, by their very nature as makers of their own food, plants remove carbon dioxide from the atmosphere. When plants are eaten by animals, their carbon is passed on to those animals. Since animals cannot make their own food, they must get their carbon either directly by eating plants or indirectly by eating animals that have eaten plants.
Respiration is the process in which oxygen is used to break down organic compounds into carbon dioxide  (CO2) and water (H2O). For an animal then, respiration is both taking in oxygen (and releasing carbon dioxide) and oxidizing its food (or burning it with oxygen) in order to release the energy the food contains. In both cases, carbon is returned to the atmosphere as carbon dioxide.
So, the correct answer is 'Respiration and photosynthesis'.