Tag: introduction to respiration

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Multiple choice zoology respiratory system experiments on photosynthesis cellular respiration introduction to respiration

Read the following four statements carefully.
(i) Ventral respiratory group of neurons of medulla oblongata can cause both inspiration and expiration. 
(ii) The part of the respiratory system starting with the external nostrils up to the terminal bronchioles constitutes the respiratory or exchange part of the respiratory system. 
(iii)  During swallowing epiglottis can be covered by a thin elastic cartilaginous flap called glottis to prevent the entry of food into the larynx.
(iv)  Binding of oxygen with haemoglobin is primarily related to partial pressure of $O _{2}$. 
Which of the above two statements are correct? 

  1. (ii) and (iii)

  2. (iii) and (iv)

  3. (i)and(ii)

  4. (i) and (iv)
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The part of the respiratory system starting with the external nostrils up to the terminal bronchioles constitutes the conducting part whereas the alveoli and their ducts form the respiratory or exchange part. During swallowing, glottis can be covered by a thin elastic cartilaginous flap called epiglottis to prevent the entry of food into the larynx.

Multiple choice zoology respiratory system experiments on photosynthesis cellular respiration introduction to respiration

Which of the following options contains the end products formed during anaerobic respiration in yeast?

  1. $H _2O, CO _2$ and energy
  2. $H _2S, C _6H _{12}O _6$ and energy
  3. $CO _2, C _2H _5OH$ and energy
  4. $H _2O$ and $CO _2$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Anaerobic respiration in yeast results in the production of ethyl alcohol, carbon dioxide and energy. $C _6H _{12}O _6 \xrightarrow[Complex]{Zymase} \underset{Ethyl \, alcohol}{2C _2H _5OH} + 2CO _2 + $

Multiple choice zoology respiratory system experiments on photosynthesis cellular respiration introduction to respiration

Inspiration and expiration contain

  1. Oxygen

  2. Oxygen and carbon dioxide

  3. Carbon dioxide

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

  • Inhaled air contains more oxygen used to create energy and less carbon dioxide.
  •  Exhaled air contains more carbon dioxide produced as a waste product of energy production and less oxygen as it has been used in respiration. Gas exchange takes place by diffusion in the alveoli within the lungs.
  •  As a result, the composition of inhaled and exhaled air is different.

Therefore, the correct answer is option B.

Multiple choice zoology respiratory system experiments on photosynthesis cellular respiration introduction to respiration

Useful energy is provided to living beings by the process of 

  1. Digestion

  2. Respiration

  3. Regulation

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

Respiration is the process in which nutrients are converted into useful energy in a cell. It is responsible in transporting oxygen and carbon dioxide between cells and the external environment.

Multiple choice zoology respiratory system experiments on photosynthesis cellular respiration introduction to respiration

Respiration oxidizes

  1. Glucose

  2. Carbon

  3. Nitrogen

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

Respiration is a catabolic process that takes place in living organisms. In this glucose is broken down in presence of oxygen to generate ATP along with the production of water and evolution of carbon dioxide. It is an exergonic process. Thus the correct answer is option A.

Multiple choice zoology respiratory system experiments on photosynthesis cellular respiration introduction to respiration

In respiration the energy is produced during the process of

  1. Glycolysis

  2. Krebs cycle

  3. Glycolysis and Krebs cycle

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

Glycolysis is the first step of respiration which converts the glucose molecules into two molecules of pyruvate along with the production of 8 ATP. The two pyruvate molecules produced by the glycolysis enters the Krebs cycle. Each molecule of pyruvate produces 15 ATP. So total 30 ATP is formed during the Krebs cycle. Total 38 ATP is formed during the aerobic respiration.

So, the correct answer is option C.

Multiple choice zoology respiratory system experiments on photosynthesis cellular respiration introduction to respiration

The common immediate source of energy in cellular activity is

  1. ADP

  2. ATP

  3. FAD

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

ATP is an Adenosine triphosphate (ribose sugar, adenine base, and three phosphate groups), where a high energy bond attaches the third phosphate group to the molecule. The highly unstable bonds break to release the inorganic phosphate to fulfill the energy required for the metabolism.

Hence, the correct answer is option B.

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

The term respiration was given by

  1. Lavosier

  2. Dutrochet

  3. Sachs

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

Henri Dutrochet, a French physiologist who is known for his valuable works in animal and plant physiology coined the term 'respiration'. He also discovered and named the process of osmosis (passage of solvent through a semipermeable membrane) that occurs at cellular level in both plants and animals. 

So the correct answer is 'Dutrochet'.

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

Which of the following is not a reason that breathing air is easier than breathing water'?

  1. A given volume of air is easier to move across the respiratory organs than the same volume of water.

  2. Air holds more oxygen per unit volume than water.
  3. Water breathers have a difficult time ridding themselves of CO, because $CO _2$ does not dissolve well in water.
  4. Temperature increases affect the $O _2$ content of water more than they do that of air.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Carbon dioxide dissolves very well in water, which is actually why water breathers can eliminate CO2 efficiently across their gills. Thus, the statement that CO2 does not dissolve well in water is incorrect, meaning it is not a reason why breathing air is easier than breathing water. In fact, the high solubility of CO2 in water creates challenges for aquatic animals to maintain low internal levels without continuous ventilation.