Tag: biology

Questions Related to biology

Acid neutraliser present in mucus of saliva is

biology structure and functions of living organisms -ii dental care, eye care and hair care dental care and dental diseases salivary glands

  1. Bicarbonate ion

  2. Thiocyanate

  3. Sodium acetate

  4. Sodium hydroxide

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Correct Option: A

The saliva secreted by salivary glands not  

biology structure and functions of living organisms -ii dental care, eye care and hair care dental care and dental diseases salivary glands

  1. Contain electrolytes like $Na^+,K^+, CI^-$ and $3 HCO _3^+$

  2. Give safely against dental carries

  3. Bring about hydrolysis of starch upto $90\%$

  4. Initiate the process of digestion

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Correct Option: B
Explanation:
  • Saliva secreted by salivary glands doesn't give safety against dental caries.
  • Dental carries take place due to deposition of food particles on teeth and subsequent bacterial decay.
  • So, the correct option is 'Give safely against dental carries'.

The part of the animal body with both endocrine and exocrine function is 

biology structure and functions of living organisms -ii dental care, eye care and hair care dental care and dental diseases salivary glands

  1. salivary gland

  2. stomach

  3. pancreas

  4. thyroid

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Correct Option: A

In salivary gland chromosomes/polytene chromosomes, pairing is?

biology structure and functions of living organisms -ii dental care, eye care and hair care dental care and dental diseases salivary glands

  1. Absent

  2. Occasional

  3. Formed between non-homologous chromosomes

  4. Formed between homologous chromosomes

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Correct Option: A

With reference to a normal human being, which one of the following statements is not correct?

biology structure and functions of living organisms -ii dental care, eye care and hair care dental care and dental diseases salivary glands

  1. Human saliva is slightly alkaline

  2. An adult human may secrete $1-1.5$L of saliva per day

  3. Saliva is secreted by six pairs of salivary glands in human beings

  4. The salivary enzyme(ptyalin) breaks down cooked starch into maltose

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Correct Option: A

The structure present is man but absent in frog is ___________.

biology structure and functions of living organisms -ii dental care, eye care and hair care dental care and dental diseases salivary glands

  1. Pancreas

  2. Thyroid gland

  3. Adrenal gland

  4. Salivary gland

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Correct Option: D

Vertebrate salivary glands and exocrine part of pancreas are.

biology structure and functions of living organisms -ii dental care, eye care and hair care dental care and dental diseases salivary glands

  1. Apocrine

  2. Holocrine

  3. Both A and B

  4. Merocrine

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Correct Option: D

Spot the salivary gland among the following

biology structure and functions of living organisms -ii dental care, eye care and hair care dental care and dental diseases salivary glands

  1. Sublingual

  2. Adrenal

  3. Brunner

  4. Lacrymal

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Correct Option: A
Explanation:

In human, 3.pairs of salivary glands are present. They are sublingual , parotid  and submaxillary .

Parotid salivary glands occur

biology structure and functions of living organisms -ii dental care, eye care and hair care dental care and dental diseases salivary glands

  1. Below ears/external acoustic meatus

  2. Below tongue

  3. At the angle of jaws

  4. Below orbits

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Correct Option: A

Lysozymes are found in

biology structure and functions of living organisms -ii dental care, eye care and hair care dental care and dental diseases salivary glands

  1. Saliva

  2. Tears

  3. Both saliva and tears

  4. Mitochondria

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Correct Option: C