CLASS: X NCERT (CBSE)
BIOLOGY
Life Processes RESPIRATION
Question 1: The most common substrate of respiration is _________.
1. fats
2. amino acids
3. glucose
4. sucrose
Answer: 3
Question 2: During respiration, the substrate is _________.
1. reduced
2. hydrogenated
3. carbonated
4. oxidised
Answer: 4
Question 3: The percentage of nitrogen in inhaled air is _____% and exhaled air is _____%.
1. 21 and 21
2. 21 and 78
3. 78 and 21
4. 78 and 78
Answer: 4
Question 4: The percentage of carbon dioxide in the inhaled air is _____% and exhaled air is ____%.
1. 0 .04 and 4
2. 4 and 0.04
3. 0 .04 and 0.04
4. 4 and 4
Answer: 1
Question 5: The process common to aerobic and anaerobic respiration is ______________.
1. oxidation
2. glycolysis
3. Kreb’s cycle
4. electron transport chain
Answer: 2
Question 6: In higher plants, the gaseous exchange takes place through ________________.
1. stomata
2. lenticels
3. general surface of some cells
4. all the above
Answer: 4
Question 7: In microbes, the gaseous exchange takes place through ______________.
1. stomata
2. lenticels
3. general surface
4. all the above
Answer: 3
Question 8: The energy rich compound generated as final product during respiration is ________.
1. NADH
2. FADH
3. ATP
4. ADP
Answer: 3
Question 9: The production of alcohol by yeast is called __________.
1. brewing
2. fermentation
3. respiration
4. none of the above
Answer: 2
Question 10: Lime water turns milky in the presence of __________.
1. carbon dioxide
2. oxygen
3. water
4. none of the above
Answer: 1
Question 11: In grasshopper, gaseous exchange takes place through ______________.
1. gills
2. spiracles
3. trachea
4. lungs
Answer: 2
Question 12: The source of oxygen for the aquatic animals is _________.
1. atmosphere
2. water
3. soil
4. none of the above
Answer: 2
Question 13: Glycolysis takes place in __________.
1. cytoplasm
2. mitochondrial matrix
3. mitochondrial cristae
4. outside the cell
Answer: 1
Question 14: Kreb’s cycle operates in ________.
1. cytoplasm
2. mitochondrial matrix
3. mitochondrial cristae
4. outside the cell
Answer: 2
Question 15: Anaerobic respiration takes place _________.
1. in the cytoplasm
2. in the mitochondria
3. outside the cell
4. both a and b
Answer: 1
Question 16: Instant source of energy is ___________.
1. sucrose
2. glucose
3. fats
4. amino acids
Answer: 2
Question 17: The number of ATP molecules produced during aerobic and anaerobic respiration are _____ and ________ respectively.
1. 2 and 38
2. 0 and 2
3. 38 and 0
4. 38 and 2
Answer: 4
Question 18: Cramps are caused by heavy exercise resulting in the accumulation of ________.
1. carbon dioxide
2. lactic acid
3. ethanol
4. heat
Answer: 2
Question 19: Anaerobic respiration in the muscles does not produce __________.
1. lactic acid
2. energy
3. carbon dioxide
4. both a and b
Answer: 3
Question 20: The product of glycolysis is ___________.
1. carbon dioxide and water
2. pyruvic acid
3. acetyl CoA
4. none of the above
Answer: 2
Question 21: Lowering of diaphragm results in _____________.
1. inspiration
2. expiration
3. it is not related to either
4. digestion
Answer: 1
Question 22: The energy produced during respiration is stored in ________.
1. pyruvic acid
2. carbon dioxide
3. adenosine monophosphate
4. adenosine triphosphate
Answer: 4
Question 23: The breathing roots are the __________.
1. rhizoids
2. stomata
3. pneumatophores
4. lenticels
Answer: 3
Question 24: The surface area of the gills increase due to the presence of __________.
1. lamellae
2. alveoli
3. arches
4. slits
Answer: 1
Question 25: The direction of flow of water is _________ that of the flow of blood in the capillaries.
1. is in the same direction as
2. is opposite to
3. not connected to
4. none of the above
Answer: 2
Question 26: Production of sound in man is due to the presence of _______________.
1. cartilage rings
2. cilia
3. goblet cells
4. vocal cords
Answer: 4
Question 27: The number of spiracles in a grasshopper are ________.
1. 10
2. 20
3. 6
4. 8
Answer: 2
Question 28: Conversion of milk to curds is due to __________.
1. spoilage
2. fermentation
3. boiling
4. heating
Answer: 2
Question 29: The process complementary to respiration is __________.
1. circulation
2. photosynthesis
3. osmoregulation
4. none of the above
Answer: 2
Question 30: Respiratory surface should be _________.
1. permeable
2. thin
3. richly supplied with blood vessels
4. all the above
Answer: 4
Question 31: The part of the respiratory tract that is responsible for keeping it healthy is ________.
1. trachea
2. bronchi
3. nasal cavity
4. all the above
Answer: 4
Question 32: Hiccups can be best described as ___________.
1. forceful sudden expiration
2. jerky incomplete inspiration
3. vibration of the soft palate during breathing while sleeping
4. sign of somebody remembering you
Answer: 2
Question 33: Snoring can be best described as __________.
1. forceful sudden expiration
2. jerky incomplete inspiration
3. vibration of the soft palate during breathing while sleeping
4. sound sleep
Answer: 3
Question 34: Sneezing can be best described as __________.
1. forceful sudden expiration
2. jerky incomplete inspiration
3. vibration of the soft palate during breathing while sleeping
4. something you should never do when someone is going out
Answer: 1
Question 35: Respiration in addition to producing energy also carry out the function of ________.
1. producing the major part of body heat
2. manufacturing food
3. maintaining water levels
4. all the above
Answer: 1
Question 36: Which of the following are the stages of respiration in the correct order?
1. gaseous transport, breathing, tissue respiration and cellular respiration
2. breathing, gaseous transport, tissue respiration and cellular respiration
3. breathing, gaseous transport, cellular respiration and tissue respiration
4. breathing, tissue respiration, cellular respiration and gaseous transport
Answer: 2
Question 37: Epiglottis guards the entrance of ____________.
1. pharynx
2. wind pipe
3. bronchus
4. lungs
Answer: 2
Question 38: The expired air differs from the inspired air in the following respects:
1. it contains more carbon dioxide
2. it contains less oxygen
3. it contains more water vapour
4. all the above
Answer: 4
Question 39: A commonly known organism that carries out anaerobic respiration is _______.
1. earthworm
2. amoeba
3. yeast
4. fish
Answer: 3
Question 40: Which structure separates thorax from abdomen?
1. lungs
2. heart
3. diaphragm
4. rib cage
Answer: 3
Question 41: Which metallic element is present in haemoglobin?
1. magnesium
2. sodium
3. iron
4. Calcium
Answer: 3
Question 42: Which muscles are responsible for expiration?
1. external intercostal
2. internal intercostal
3. a and abdominal
4. b and abdominal
Answer: 4
Question 43: Which area of the brain controls the respiratory movements?
1. Cerebrum
2. cerebellum
3. Medulla
4. Medusa
Answer: 3
Question 44: The instrument used to measure the volume of respired gases is _______________.
1. respiroscope
2. spirometer
3. barometer
4. thermometer
Answer: 2
Question 45: Maximum carbon dioxide concentration will be in the ______________.
1. inspired air
2. expired air
3. dead space air
4. all will be same
Answer: 2
Question 46: Complemental air is the ______________.
1. inspiratory reserve air
2. expiratory reserve air
3. tidal volume
4. vital capacity
Answer: 1
Question 47: Supplemental air is the ________________.
1. inspiratory reserve air
2. expiratory reserve air
3. tidal volume
4. vital capacity
Answer: 2
Question 48: Volume of air that can be taken in and expelled out by maximum inspiration and expiration is ______________.
1. lung capacity
2. vital capacity
3. tidal volume
4. respiratory volume
Answer: 2
Question 49: Which of the following statements is true about lungs?
1. Lungs are spongy but not elastic
2. Lungs are spongy and lobed
3. Lungs are lobed but not spongy
4. Lungs do not have any particular shape
Answer: 2
