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#7 | Digestive Secretions: Saliva
(Zoology) > Digestion and Absorption (OLD NCERT)

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Optimum pH of saliva action is:

(1) 6.8

(2) 8.6

(3) 7

(4) 9.5

 96%
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Assertion      :       Chewing is one of the important process of digestion in animals.

Reason         :       It helps in enzyme action.

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false
 58%
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Assertion      :       Starch is hydrolysed by ptyalin to maltose.

Reason         :       Sucrose hydrolyses sucrose to lactose.

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false
 63%
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Bolus is formed in

(1) Buccal cavity

(2) Oral cavity

(3) Pharynx

(4) More than one option is correct

 71%
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Bolus from oral cavity to ……... Oesophagus……..stomach. Which of the process/ movements are responsible for it?

(1) Deglutition and segmentation

(2) Deglutition and peristalsis

(3) Peristalsis and segmentation

(4) Peristalsis and deglutition

 86%
From NCERT
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