Tag: experiments on photosynthesis

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Questions Related to experiments on photosynthesis

Multiple choice respiration-the energy producing system experiments on photosynthesis cellular respiration introduction to respiration

Name the scientist who demonstrated that breath is caused by the formation of carbon dioxide in blood. 

  1. Thomas Adams

  2. J Haldane

  3. J Priestley

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In 1906, Haldane and Priestley discovered that respiratory reflex i.e. breath is caused by an excess of carbon dioxide in the blood and not by a lack of oxygen. They described the regulation of respiratory drive by carbon dioxide and its effects on blood hydrogen ion concentration The high ability of deoxygenated haemoglobin to bind with carbon dioxide was named as Haldane effect. Thus the correct answer is option B.

Multiple choice respiration-the energy producing system experiments on photosynthesis cellular respiration introduction to respiration

Who discovered oxygen gas?

  1. Priestley

  2. Erlich

  3. Chadwick

  4. Tansley
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Oxygen gas was discovered by the scientist Joseph Priestley in 1773. It is the most important gas responsible for the life on earth. It is produced by plants by the process of photosynthesis but consumed by the animals by the process of respiration.
So, the correct answer is 'Priestly'.
Multiple choice respiration-the energy producing system experiments on photosynthesis cellular respiration introduction to respiration

Health man can inspire or expire approximately _________ ml of air per minute.

  1. $a = 9.8\ ml, b = 6000\ ml$ to $8000\ ml, c = 12\ to \ 16, d = 3$
  2. $a = 5\ ml, b = 500\ ml, c = 12\ to \ 16, d = -3$
  3. $a = 5\ ml, b = 6000\ ml$ to $8000\ ml, c = 12\ to \ 16, d = 3$
  4. $a = 5\ ml, b = 6000\ ml$ to $8000\ ml, c = 18 times, d = 7$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A healthy adult typically has a tidal volume of about 500 ml and a respiratory rate of 12 to 16 breaths per minute. The total volume of air inspired or expired per minute (minute ventilation) is roughly 6000 to 8000 ml.

Multiple choice respiration-the energy producing system experiments on photosynthesis cellular respiration introduction to respiration

The respiratory loss of producers, herbivores and carnivores are respectively

  1. 105, 20%,30%

  2. 20%, 30%, 60%

  3. 20%, 40%, 80%

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

The amount of energy and biomass in the producers of the food chain is 100%. At each successive level, the energy and biomass are lost. The organisms at each level use energy for respiration. This is called respiration loss. When producers are eaten by the herbivores, there is 20% respiratory loss as producers use about 20% of energy in the form of respiration. Similarly, when herbivores are eaten by carnivores, there is 30% respiratory loss as 30% of energy is used by herbivores. Also, about 60% of the energy is used by carnivores during respiration. Hence, respiratory loss from carnivores to decomposer is 60%. 

Thus, the correct answer is '20%, 30%, 60%'.

Multiple choice respiration-the energy producing system experiments on photosynthesis cellular respiration introduction to respiration

Which one of the following scientists is credited with overthrowing the phlogiston theory and establishing the actual nature of chemical oxidations on combustions and their similarity to respiration in animals?

  1. Antoine Lavoisier

  2. Joseph Priestly

  3. Jean Baptiste van Helmont

  4. Joseph Dalton Hooker
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The phlogiston theory is a scientific theory which states that the fire-like element is referred to phlogiston which is released during the process of combustion and explains the process of combustion and rusting which is together called as oxidation.

Antoine Lavoisier opposed this theory of phlogiston, he is called as father of modern chemistry. He discovered oxygen and told about its properties and chemical reactions. He has given a theory of combustion in which he has mentioned the rate of respiration and the relation between combustion and respiration, where oxygen is used in both the process.
So , correct option is ' Antoine Lavoisier ' . 

Multiple choice respiration-the energy producing system experiments on photosynthesis cellular respiration introduction to respiration

Who discovered cellular respiration?

  1. Priestley

  2. Paul Erlich

  3. Thomas Adams

  4. Benda
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Cellular respiration is a process takes place in the cells of the organism to convert biochemical energy from nutrients into ATP. It include breaking down of sugar in the presence of oxygen. This process was discovered by Thomas Adams.
So, the correct answer is 'Thomas Adams'.