NCERT Biology-[Digestive System]- Important MCQs

NCERT Biology-Digestive System- Important MCQs

Question”1 A Process of breaking of large and complex Organic Molecules into small and simple Molecules is known as-

1. Respiration
2. Digestion
3. Excretion
4. Circulation

Question”2 which of the following is/ are not the part of human digestive system?

1. Alimentary canal
2. heart
3. Digestive gland
4. Both A and c

Question”3 what is the length of alimentary canal in human?

1. 5m
2. 9m
3. 7.5 cm
4. 7.5m

Question”4 In humans alimentary canal starts from ——– and ends in anus-

1. Mouth
2. Neck
3. Stomach
4. Small Intestine

Question”5 ——- is are the part of alimentary canal in humans-

1. Buccal Cavity
2. Oesophagus
3. Stomach
4. all of these

Question”6 which of the following is not present in our buccal cavity?

1. Tongue
2. Tooth
3. Gustatory receptors
4. epiglottis

Question”7 From which of part of the tongue sense the sweet taste?

1. apex
2. rear
3. side
4. None of these

Question”8 Human teeth are of —– type-

1. Thecodont
2. disphyodont
3. Heterodont
4. all of these

Question”9 if Sonu has milk teeth then maximum number of these can be ?

1. 22
2. 32
3. 20
4. 32

Question”10 which is not correct related to teeth in an adult?

1. Have temporary
2. have Permanent
3. 32 in number
4. are heterodont

Question”11 There are absent in Milk” teeth-

1. Incisors
2. Canine
3. Premolars
4. Molars

Question”12 what is the number of teeth in humans that come out Once in a lifetime?

1. 8
2. 4
3. 12
4. 14

Question”13 which of the following is/are Monophyodont?

1. Wisdom teeth
2. Premolars
3. Molars
4. Both A and B

Question”14 Generally Wisdom teeth” arise-

1. after 10 years
2. after 12 years
3. after 16 years
4. after 18 years

Question”15 which of the following is/ are the part (s) of teeth?

1. Crown
2. Neck
3. Root
4. all of these

Question”16 The part of a tooth that grow above the gums is called-

1. root
2. neck
3. crown
4. None of these

Question”17 Within every tooth there is a Cavity, called –

1. Pulp Cavity
2. Dentine
3. Enamel
4. None of these

Question”18 Maximum parts of our tooth made up of light yellow substance called –

1. enamel
2. dentine
3. bone
4. iron

Question”19 ——- Provides protection to sensory layer of tooth and keep tooth shiny-

1. Dentine
2. Enamel
3. Pulp cavity
4. all of the above

Question”20 which is the hardest part of the human body?

1. Bone
2. dentine
3. enamel
4. stapes

Question”21 which is are the hardest tissues(s) of the human body?

1. enamel of tooth
2. dentine to tooth
3. Bone
4. all of these

Question”22 Enamel and dentine of our teeth are mainly made up of –

1. Calcium and Magnesium
2. Calcium and Phosphorous
3. Calcium and Carbon
4. Sodium and Potassium

Question”23 Which is/are correct related to different types of teeth and their function?

1. Incisors — Cutting
2. Canines — Tearing
3. Molars — Grinding or Chewing
4. all of these

Question”24 The buccal Cavity opens in ——— which is common passages for both air and food –

1. Trachea
2. Pharynx
3. Gullet
4. Glottis

Question”25 When Swallowing ——– Prevent the food to enter in wind pipe-

1. Epiglottis
2. Gullet
3. Glottis
4. None of these

Question”26 what is the length of Oesophagus in our body?

1. 9m
2. 9cm
3. 25cm
4. 18cm

Question”27 In which part of elementary canal has no digestive function?

1. Buccal cavity
2. Oesophagus
3. Stomach
4. small intestine

Question”28 As soon as the bolus reaches the Oesophagus, relaxation or contraction in its walls starts it’s called ——-?

1. Chyme
2. food wave
3. Peristalsis
4. Compression

Question”29 The Stomach situated on the left side of the abdominal cavity which letter of English it looks like?

1. C
2. L
3. U
4. J

Question”30 which of the following is a part of stomach nearest to small intestine?

1. Cardiac
2. Pyloric
3. Fundus
4. None of these

Question”31 From which gastric gland is related to ?

1. large intestine
2. small intestine
3. buccal cavity
4. stomach

Question”32 Gastric gland Secretes ——–

1. Amylase
2. Gastric juice
3. bile
4. Insulin

Question”33 which is incorrect related to gastric gland?

1. acidic in nature
2. basic in nature
3. pale yellow in colour
4. pH value is 1.2 to 3.0

Question”34 From the cell of gastric gland mucus is secreted in gastric juice?

1. Goblet cell
2. Oxyntic cell
3. Peptic cell
4. basal cell

Question”35 what is the main function (s) of hydrochloric acid present in gastric juice?

1. Activates the inactive enzymes
2. It destroy the germs comes with food
3. it makes food soft
4. all of these

Question”36 which of the following is/are proteolytic enzymes (s)?

1. Pepsin
2. HCI
3. Rennin
4. Both A and c

Question”37 Intrinsic factor of castle in gastric juice is essential for absorption of —

1. Vitamin C
2. Vitamin B₉
3. vitamin B₁₂
4. Vitamin K

Question”38 In our body digestion Process is Initiated from –

1. Buccal cavity
2. Stomach
3. small Intestine
4. ileum

Question”39 which of the following starts digesting from our mouth?

1. Protein
2. fat
3. Carbohydrate (starch )
4. Carbohydrate ( Cellulose )

Question”40 From where digestion of protein gets start in our digestive Process?

1. Buccal cavity
2. Stomach
3. small intestine
4. large intestine

Question”41 The partially digested food in stomach that enters the small intestine” called –

1. Bolus
2. Chyme
3. chyle
4. Monus

Question”42 which part of small intestine is first and smallest?

1. Duodenum
2. Jejunum
3. Ileum
4. Caecum

Question”43 In human body the shape of Duodenum looks like the English letter-

1. U
2. C
3. L
4. J

Question”44 where is the maximum digestion take place in human body?

1. Stomach
2. large intestine
3. small intestine
4. buccal cavity

Question”45 what is the longest part of human alimentary canal?

1. Oesophagus
2. Trachea
3. large intestine
4. small intestine

Question”46 Digestion Process in human body ends in ——-

1. small intestine
2. large intestine
3. rectum of large intestine
4. Caecum of small intestine

Question”47 which part of small intestine is longest?

1. duodenum
2. jejunum
3. ileum
4. Caecum

Question”48 In the inner layer of the wall of ileum finger shaped structures are found which is called –

1. alveolus
2. Villi
3. Rectum
4. Fundus

Question”49 what is the main function of Villi present in small intestine?

1. Increase the absorptive surface
2. decrease the absorptive surface
3. digestion of fats
4. digestion of proteins

Question”50 ——- is required for activation of enzymes in intestine-

1. Neutral medium
2. acidic medium
3. basic medium
4. None of these

Answers

Question No	Answer	Question No	Answer
1	B	26	C
2	B	27	B
3	B	28	C
4	A	29	D
5	D	30	B
6	D	31	D
7	A	32	B
8	D	33	B
9	C	34	A
10	A	35	D
11	C	36	D
12	C	37	C
13	D	38	A
14	D	39	C
15	D	40	B
16	C	41	B
17	A	42	A
18	B	43	B
19	B	44	C
20	C	45	D
21	C	46	A
22	B	47	C
23	D	48	B
24	B	49	A
25	A	50	C