Tag: energy flow in food chain

Questions Related to energy flow in food chain

In solar ecosystem, an extra energy is available for system, used for production of:

botany ecosystem : structure and function energy flow in food chain food chain and energy flow energy flow in ecosystem

  1. Organic matters

  2. Food

  3. Water

  4. $CO _{2}$

Show answer
Correct Option: A

Choose the correct answers from the alternatives given .
Endergonic reactions

botany organisms and their environment energy flow in food chain food chain and energy flow energy flow in ecosystem

  1. are always coupling reactions

  2. can only occur if there is an input of energy

  3. have products with less free energy than the reactants

  4. all of the above are correct

Show answer
Correct Option: B
Explanation:
Endergonic needs an input of energy to create the products, which have more free energy as a whole than the sum of free energy of each of the reactants. An example of this type of reaction in biology is photosynthesis. This process depends on the reaction to absorb energy in the form of sunshine from the surroundings for it to occur. 
So, the correct option is 'can only occur if there is an input of energy'. 

Conversion of solar energy is governed by law of

botany ecosystem : structure and function energy flow in food chain food chain and energy flow energy flow in ecosystem

  1. Conversion

  2. Convection

  3. Thermodynamics

  4. Inertia

Show answer
Correct Option: C

Choose the correct answers from the alternatives given .
ATP is considered a high-energy compound because under cellular conditions, 7.3 kcal per mole of energy is released when a bond is broken between the

botany ecosystem energy flow in food chain food chain and energy flow energy flow in ecosystem

  1. base adenine and the sugar ribose

  2. adenosine and the phosphate groups

  3. base adenine and the phosphate groups

  4. adenosine diphosphate and the third phosphate

Show answer
Correct Option: D
Explanation:
Energy is stored in the covalent bonds between each phosphate group which makes up the tail of the molecule. The last phosphate bond holds the most energy (approx. 7.3 kcal/mole). It is called the pyrophosphate bond. In order to release it's energy to the body, ATP breaks down into ADP [Adenosine Diphosphate(2 phosphates)] and an inorganic phosphate group and releases energy from the pyrophosphate bond.

So, the correct option is 'Adenosine diphosphate and the third phosphate'.

Choose the correct answers from the alternatives given .
A living organism represents stored energy in the form of chemical compounds When an organism dies, what happens to.that stored energy?

botany organisms and their environment energy flow in food chain food chain and energy flow energy flow in ecosystem

  1. All chemicals immediately lose their high-energy bonds

  2. All molecules immediately degrade into basic elements

  3. All energy immediately leaves, and that is. one manifestation that the organism is dead

  4. Chemical compounds in cells lose their organisation over time because there is no longer an input of energy to maintain the organised state

Show answer
Correct Option: D
Explanation:

There is constant input of energy needed for all the activities that go inside a living organism. Food is the source of this energy. When an organism dies, these activities or reactions are stopped which results in loss of organisation of chemical compounds in cells. 

So, the correct option is 'Chemical compounds in cells lose their organisation over time because there is no longer an input of energy to maintain the organised state'.

State whether the following statements are true or false .
An open system has access to environment for matter and energy.

botany organisms and their environment energy flow in food chain food chain and energy flow energy flow in ecosystem

  1. True

  2. False

Show answer
Correct Option: A
Explanation:

 An open system is a system that has external interactions. An open system is defined as a system in exchange of matter with its environment, presenting import and export of matter and energy.

So, the correct option is 'True'.

Photosynthetically active radiation (PAR) represents which of the following range of wave length?

botany ecosystem energy flow in food chain food chain and energy flow energy flow in ecosystem

  1. 400 - 700 nm

  2. 500 - 600 nm

  3. 450 - 950 nm

  4. 340 - 450 nm

Show answer
Correct Option: A
Explanation:

Photosynthetically active radiation, often abbreviated PAR, designates the spectral range (wave band) of solar radiation from 400 to 700 nanometers, that photosynthetic organisms are able to use in the process of photosynthesis. This spectral region corresponds more or less with the range of light visible to the human eye.

Choose the correct answers from the alternatives given .
Which of the following metabolic processes can occur without a net influx of energy from some other process ?

botany organisms and their environment energy flow in food chain food chain and energy flow energy flow in ecosystem

  1. ADP $^+$ P $\rightarrow$ ATP $^+$ H2O

  2. $C _6$$H _{12}$$O _6$ $^+$ $6O _2$ $\rightarrow$ $6CO _2$ $^+$ $6H _2O$

  3. $6CO _2$ $^+$ $6H _2O$ $\rightarrow$ $C _6$$H _{12}$$O _6$ $^+$ $6H _2O$

  4. $CO _2$ + $2H _2O$ $\rightarrow$ $CH _4$ $^+$ $2O _2$

Show answer
Correct Option: B
Explanation:
C$ _6$H$ _1$$ _2$O$6$ + 6O$2$ $\rightarrow$ 6CO$2$ +6H$2$O in this process glucose breaks down to give its hydrogens to the oxygen, it really does not need a lot of energy to begin and to keep going. It simply needs a small spark and then it can keep going until its done.
So, the correct option is 'C$ _6$H$ _{12}$O$ _6$ + 6O$ _2$ $\rightarrow$ 6CO$ _2$ +6H$ _2$O'

Main objective of production of herbicide resistant GM crops is to

botany organisms and their environment energy flow in food chain food chain and energy flow energy flow in ecosystem

  1. Encourage eco-friendly herbicides

  2. Reduce herbicide accumulation in food articles for health safety

  3. Eliminate weeds from the field without the use of manual labour

  4. Eliminate weeds from the field without the use of herbicides.

Show answer
Correct Option: B
Explanation:

Weeds such as String decrease crop yields and quality by competing with crop plants for light, water and nutrients. Weeds are to be removed with the help of herbicide (weed killer). Herbicide tolerance has been developed in maize, cotton, soybean, tobacco, etc. The main aim is to reduce herbicide  accumulation in food products for health safety.

State whether the following statements are true or false .
Energy is anything that occupies space and has weight.

botany organisms and their environment energy flow in food chain food chain and energy flow energy flow in ecosystem

  1. True

  2. False

Show answer
Correct Option: B
Explanation:

The matter is anything that occupies space and has mass. Energy is the capacity for doing work. The difference between matter and energy is that energy is produced from matter yet has no mass.

So, the correct option is 'False'.