7th Class Science Respiration in Organisms Question Bank

done Respiration in Organisms Total Questions - 20

• question_answer1)
  Which of the following is the correct path of oxygen in humans during inhalation? 
  A)
  Nostrils\[\to \]Nasal Cavity\[\to \]Pharynx\[\to \]Trachea\[\to \]Bronchi\[\to \]Bronchiole\[\to \] Alveoli                            done clear
  B)
  Nostrils\[\to \]Nasal Cavity\[\to \]Trachea \[\to \]Pharynx\[\to \]Bronchi\[\to \]Bronchiole\[\to \] Alveoli                           done clear
  C)
  Nostrils\[\to \]Nasal Cavity\[\to \]Pharynx \[\to \]Trachea \[\to \]Alveoli\[\to \]Bronchi\[\to \]Bronchiole                         done clear
  D)
  Nostrils\[\to \]Nasal Cavity \[\to \]Pharynx\[\to \]Bronchi\[\to \]Trachea\[\to \]Bronchiole\[\to \] Alveoli                           done clear
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• question_answer2)
  Match column I with column II and select the correct option from the codes given below.                              

  Column I	Column II
  (a) Earthworm	(i) Pulmonary respiration
  (b) Human	(ii) Branchial respiration
  (c)  Prawn	(iii) Tracheal respiration
  (d) Insects	(iv) Cutaneous respiration

  A)
  (a) - (i), (b) - (ii), (c) - (iii), (d) - (iv)   done clear
  B)
  (a) - (iv), (b) - (i), (c) - (ii), (d) - (iii)   done clear
  C)
  (a) - (iii), (b) - (ii), (c) - (iv), (d) - (i)   done clear
  D)
  (a) - (iv), (b) - (ii), (c) - (i), (d) - (iii)   done clear
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• question_answer3)
  Consider the following statements and select the option which correctly identifies true (T) and false (F) ones.             

  (i) In cockroaches, air enters the body through spiracles.

  (ii) During heavy exercise, we get cramps in the legs due to accumulation of carbon dioxide.

  (iii) Normal range of breathing rate per minute in an average adult person at rest is 12-18.

  (iv) During exhalation, the ribs move upwards.

   
  A)

  (i)	(ii)	(iii)	(iv)
  F	T	F	T

    done clear
  B)

  (i)	(ii)	(iii)	(iv)
  T	T	F	T

    done clear
  C)

  (i)	(ii)	(iii)	(iv)
  T	F	T	F

    done clear
  D)

  (i)	(ii)	(iii)	(iv)
  T	T	T	F

    done clear
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• question_answer4)
  Which of the following substances is/are present in a higher percentage in exhaled air than in inhaled air?

  (i) Carbon dioxide	(ii) Oxygen
  (iii) Water vapour	(iv) Nitrogen

  A)
  (i) only done clear
  B)
  (i) and (iii) only done clear
  C)
  (ii) and (iv) only done clear
  D)
  (i), (ii), (iii) and (iv) done clear
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• question_answer5)
  Select the correct sequence of words to complete the given passage.

  The pharynx actually has two apertures, one opening into the windpipe and the other into the ___. The aperture opening into the windpipe is guarded by ___. It closes the windpipe when you take ___.

  A)
  Oesophagus, Uvula, Food done clear
  B)
  Stomach, Epiglottis, Water done clear
  C)
  Oesophagus, Epiglottis, Food done clear
  D)
  Liver, Uvula, Water done clear
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• question_answer6)
  Study the given experimental set up. Which of the following statements holds true when the rubber sheet is pulled down?      

  (i) Air pressure inside the bell jar increases-

  (ii) The balloons inside jar expand.

  (iii) This is similar to expansion of lungs during inhalation.

  (iv) This is similar to contraction of lungs during exhalation.

  A)
  (ii), (iii) and (iv) only                   done clear
  B)
  (ii) and (iii) only            done clear
  C)
  (i) and (iv) only                      done clear
  D)
  (i), (iii) and (iv) only                   done clear
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• question_answer7)

  Read the given passage and select the correct option for (i) - (iii).

  ___(i)___ are present in the chest cavity. This cavity is surrounded by ___(ii)___ on the sides which form a cage like structure. A large muscular sheet called ___(iii)___ forms the floor of the chest cavity.

   
  A)
  (i)-Lungs; (ii)-Ribs; (iii)-Diaphragm done clear
  B)
  (i)-Diaphragm; (ii)-Ribs; (iii)-Lungs done clear
  C)
  (i)-Bronchi; (ii)-Ribs; (iii)-Lungs done clear
  D)
  (i)-Trachea; (ii)-Bronchi; (iii)-Lungs done clear
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• question_answer8)
  Read the given statements and select the correct option.                          

  (i) In insects, circulating body fluids serve to distribute oxygen to tissues.

  (ii) Yeasts respire aerobically, therefore, they are used to make wine and beer.

  (iii) Bronchitis is the inflammation of bronchi which may be caused on exposure to air pollutants.

  (iv) In a healthy person, maximum capacity of lungs for inhaled air is 1500 mL.

  (v) Sneezing expels the foreign particles from the inhaled air.

  A)
  Statements (i), (ii) and (iv) are incorrect, while statements (iii) and (v) are correct. done clear
  B)
  Statements (i), (ii) and (iii) are incorrect, while statements (iv) and (v) are correct. done clear
  C)
  Statement (ii) is incorrect, while statements (i), (iii), (iv) and (v) are correct. done clear
  D)
  Statements (ii) and (v) are incorrect, while statements (i), (iii) and (iv) are correct. done clear
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• question_answer9)
  The given graph shows changes in the concentration of lactic acid in the muscles of an athlete both during and after race. At what time did the athletes finish the race?
  A)
  2 minutes         done clear
  B)
  5 minutes         done clear
  C)
  4 minutes       done clear
  D)
  6 minutes done clear
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• question_answer10)
  A person put warm water in an aquarium, thinking that the fish would be more comfortable in it. However, the fish died. What can be the reason for this?
  A)
  The concentration of oxygen decreases in warm water. done clear
  B)
  The concentration of carbon dioxide increases in warm water. done clear
  C)
  Fish cannot bear the extreme heat of the water. done clear
  D)
  All of these done clear
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• question_answer11)
  When a person breathes in, what happens to the diaphragm and to the rib cage?  
  A)

  Diaphragm	Rib cage
  Becomes flatten	Moves downwards and inwards

                  done clear
  B)

  Diaphragm	Rib cage
  Becomes flatten	Moves outwards and upwards

                  done clear
  C)

  Diaphragm	Rib cage
  Becomes more  curved	Moves downwards and inwards

                  done clear
  D)

  Diaphragm	Rib cage
  Becomes more  curved	Moves outwards and upwards

  done clear
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• question_answer12)

  Farheen soaked some bean seeds in water overnight. Next morning she drained the water and kept the seeds moist till they started germinating. She boiled half of the seeds and then kept the germinating seeds in one thermos flask (X) and the 'boiled seeds in another thermos flask (Y).

  She covered the mouths of both flasks with moist cotton wool. Then she inserted thermometers in both flasks and kept the flasks as shown in the figure.

  What would be her observation?       
  A)
  Temperature of flask X increases because it has photosynthesizing seeds.                          done clear
  B)
  Temperature of flask X increases because it has respiring seeds. done clear
  C)
  Temperature of flask Y increases because it has boiled seeds.  done clear
  D)
  Both (B) and (C)                  done clear
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• question_answer13)
  Read the following statements and select the correct option.

  Statement 1: Yeast is single-celled organisms which is used in baking and brewing industry.

  Statement 2: Yeast carry out anaerobic respiration, i.e., fermentation and release, ethyl alcohol and carbon dioxide.

  A)
  Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. done clear
  B)
  Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. done clear
  C)
  Statement 1 is true but statement 2 is false. done clear
  D)
  Both statements 1 and 2 are false. done clear
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• question_answer14)
  Which of the following correctly represents the approximate composition of exhaled air by humans?
  A)

  \[{{O}_{2}}\]=21%

  \[C{{O}_{2}}\]=4.4%

    done clear
  B)

  \[{{O}_{2}}\]=21%

  \[C{{O}_{2}}\]=0.03%

  done clear
  C)

  \[{{O}_{2}}\]=16.4%

  \[C{{O}_{2}}\]=4.4%

  done clear
  D)

  \[{{O}_{2}}\]=16.4%

  \[C{{O}_{2}}\]=0.03%

    done clear
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• question_answer15)
  Read the given paragraph.

  Sometimes, during strenuous activity such as long distance running, your body cannot get enough ___(i)___ to produce the required energy. To get the additional energy, ___(ii)___ respiration occurs within your muscle cells. In this process, there is partial breakdown of ___(iii)___ to produce ___(iv)___. the accumulation of which in the body causes ___(v)___. Q

  Complete the above paragraph by selecting the correct sequence of words.

   
  A)
  Food, Aerobic, Starch, Uric acid, Uremia done clear
  B)
  Carbon dioxide, Anaerobic, Protein, Lactic acid, Bone cramps done clear
  C)
  Oxygen, Aerobic, Fructose, Hydrochloric acid, Muscular cramps done clear
  D)
  Oxygen, Anaerobic, Glucose, Lactic acid, Muscular cramps done clear
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• question_answer16)

  The given figure illustrates the changes in lung volume during the process of breathing.

  The change from Q to R indicates the

                       
  A)
  Movement of air out of the lungs    done clear
  B)
  Ribs move upward and outward     done clear
  C)
  Expansion of thoracic cavity        done clear
  D)
  Movement of diaphragm away from the lung.                        done clear
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• question_answer17)
  Study the given flow chart about respiratory structures in different organisms. Identify the organisms P, Q, R and S and select the correct option.                      
  A)
  P-Cockroach, Q-Tadpole, R-Pigeon, S-Earthworm                     done clear
  B)
  P-Grasshopper, Q-Fish, R-Frog, S-Amoeba                     done clear
  C)
  P-Spider, Q-Frog, R-Crab, S-Paramecium                done clear
  D)
  P-Mynah, Q-Snake, R-Penguin, S-Leech                       done clear
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• question_answer18)

  Three test tubes are set up as shown. The indicator used here changes from red to yellow when exposed to increased levels of carbon dioxide. At the start of the experiment, the indicator in each test tube was red.

  What will be the colour of the indicator in each test tube after two hours?

     
  A)

  A	B	C
  Yellow	Yellow	Red

  done clear
  B)
        

  A	B	C
  Red	Yellow	Red

  done clear
  C)

  A	B	C
  Yellow	Red	Red

  done clear
  D)

  A	B	C
  Yellow	Yellow	Yellow

  done clear
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• question_answer19)

  The given diagram shows a respirometer that is used to measure gaseous exchange in gram seeds. The apparatus is maintained at a constant temperature.

    Which of the following is correct regarding it?

  (i) The gas pressure at X will fall as \[{{O}_{2}}\] is absorbed during respiration and\[C{{O}_{2}}\], is absorbed by potassium hydroxide solution.

  (ii) The fluid level at Y will fall to compensates the loss of pressure in X.

  (iii) The gas pressure at X will rise as 0;, is given out by seeds and \[C{{O}_{2}}\] is released by potassium hydroxide ;solution.

  (iv) The fluid level at Z will rise due to loss of pressure at X.

   
  A)
  (i), (ii) and (iv) only       done clear
  B)
  (ii), (iii) and (iv) only                   done clear
  C)
  (i), (iii) and (iv) only                   done clear
  D)
  (i), (ii) and (iii) only                    done clear
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• question_answer20)
  Rohan set up an experiment as shown in the figure. What will he observe after sometime?            
  A)
  Lime water in test tube Y turns milky. done clear
  B)
  Lime water in test tube Z turns milky. done clear
  C)
  Potassium hydroxide solution in test tube X turns blue. done clear
  D)
  Temperature in the flask will go down. done clear
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