Tag: structure and functions of living organisms -ii

Questions Related to structure and functions of living organisms -ii

Which gland does not take part in saliva production

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

  1. Parotid

  2. Submaxillary

  3. Submucosal

  4. Sublinguals

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Correct Option: C

How many pairs of salivary glands are there in humans

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

  1. 1

  2. 2

  3. 3

  4. 4

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Correct Option: C

Variation in length of the filament of stamen can be seen in.

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

  1. Salvia

  2. Mustard

  3. Chinarose

  4. Both $(1)$ and $(2)$

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Correct Option: A

Which of the following statements is TRUE about glandular epithelium is salivary gland?

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

  1. It consists of isolated single cells

  2. It consists of multicellular cluster of cells

  3. Its secretions are endocrine

  4. It consists of squamous epithelial cells

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Correct Option: B

Enzyme ptyalin or salivary amylase present in the saliva gets activated by 

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

  1. Mastication of food

  2. Hydrolysis of food by saliva

  3. Starch present in the food

  4. Chloride ions present in saliva

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Correct Option: A
Explanation:

Chewing or mastication is the process by which food is crushed and ground my teeth. It is the first step of digestion, and it increases the surface area of foods to allow a more efficient break down by enzymes. So the correct option is 'Mastication of food '.

Which of the following is a soft material in the tooth?

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

  1. Dentine

  2. Pulp

  3. Enamel

  4. Root

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Correct Option: B
Explanation:

Pulp is the soft material in the tooth it is richly supplied with blood vessels and nerves.

A mixture containing DNA fragments a, b, c and d with molecular weights of a+b = c, a > b and d > c, was subjected to agarose gel electrophoresis. The movement of these fragments from cathode to anode sides of the gel would be

biology the life cycle of animals how do animals reproduce? excretory, nervous and reproductive system structure and functions of living organisms -ii

  1. Smaller molecules move faster

  2. Both smaller and larger will move at same pace

  3. Larger will move faster

  4. None of these

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Correct Option: A
Explanation:
  • In Agarose gel electrophoresis we separate macromolecules like DNA, RNA and protein on the basis of their molecular size and charge.
  • In this Shorter molecules move faster and migrate farther than longer ones because shorter molecules migrate more easily through the pores of the gel. 
  • DNA migrate towards anode.

Cowper's glands are found in-

biology the life cycle of animals how do animals reproduce? excretory, nervous and reproductive system structure and functions of living organisms -ii

  1. Male mammals.

  2. Female mammals.

  3. Male amphibians.

  4. Female amphibians.

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Correct Option: A

Parthenogenesis is the development of an organism directly from : 

biology the life cycle of animals how do animals reproduce? excretory, nervous and reproductive system structure and functions of living organisms -ii

  1. Female gametes

  2. Vegetative cells

  3. Fertilized ovum

  4. None of these

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Correct Option: D

In which organism female is XO and Male is XX?

biology the life cycle of animals how do animals reproduce? excretory, nervous and reproductive system structure and functions of living organisms -ii

  1. Bed bug

  2. Grasshopper

  3. Fumia

  4. Sparrow

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Correct Option: A