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Doctors Medicines MCQs Q&A

Consider the following statements regarding the Structure of cells: 1. Both Animal & Plant cells comprise amyloplast within the cell membrane. 2. Plant cells have plasmodesmata channels whilst animal cells do not. 3. Vacuoles in both plant cells & animal cells are always filled with solid substances. Which of the statement given above is/are not correct? 

Consider the following statements regarding the Structure of cells: 1. Both Animal & Plant cells comprise amyloplast within the cell membrane. 2. Plant cells have plasmodesmata channels whilst animal cells do not. 3. Vacuoles in both plant cells & animal cells are always filled with solid substances. Which of the statement given above is/are not correct?  Correct Answer 1 and 3 only

The correct answer is 1 and 3 only.

Important Points

Animal Cell Plant Cell
Absence of cell wall. Presence of cell wall.
Presence of Centriole & Centrosome. Absence of Centrioles & Centrosome.
Plasmodesmata channels are absent. Presence of Plasmodesmata Channels.
Plastids absent (Except Euglena). Plastids of various types are present with the entire protein-synthesizing mechanism.
Irregular or rounded in shape. Square or rectangular in shape.
Food is stored as glycogen. Food is stored as starch.
Plasma Membrane is present.
The endoplasmic reticulum is present.
The nucleus lies in the centre of the cell. The nucleus lies on one side of the cell.
Golgi apparatus, Cytoplasm, Ribosomes & Plastids are present.
Generally, numerous & small. Some large or a single, centrally located vacuole.
Fewer mitochondria. Numerous mitochondria.

 

  • Hence, statement 2 is correct.
  • Amyloplast: 
    • It found in plant cells.
    • They are derived from a group of plastids known as leucoplasts.
      • Hence, statement 1 is incorrect.
    • Amyloplasts are commonly found in vegetative plant tissues like bulbs, tubers, cells etc.
    • They are plastids that produce & store starch within internal compartments.
    • They are involved in gravitropism & helps plant roots to grow in a downward direction.
    • They convert glucose to starch for storage.
  • Vacuoles:
    • ​They are present both in animal & plant cells.
    • They are surrounded by a single unit membrane known as tonoplast.
    • Vacuoles are filled with liquid substances containing organic & inorganic molecules.
      • Although in some case, it may contain solid items which are engulfed.
      • Hence, statement 3 is incorrect.
    • It is known as the storage house of the cell in which minerals are present.

Additional Information

  • Plasmodesmata Channels:
    • They are cytoplasmic communication channels that are vital for the development of plants.
    • They conduct transportation by bridging neighbouring cells across their cell walls.
      • They also allow the transportation of RNAs.
    • They also permit the diffusion of metabolites like sugars, ions & essential nutrients & proteins.

Related Questions

Which of the following statements are correct regarding the general difference between plant and animal cells? 1. Plant cells have cellulose cell walls while animal cells do not. 2. Plant cells do not have a plasma membrane, unlike animal cells which do. 3. Mature plant cell has one large vacuole whilst animal cell has many small vacuoles. Select the correct answer using the code given below:
Consider the following statements. A. Vacuoles are used for storage purpose. B. Size of vacuoles is same for animals and plants.  C. Some plant vacuoles may cover 50 - 90 % of the plant cell.  D. Vacuoles are membrane-bound organelles. Which among the following statements are correct. 
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1. Plant cells have cellulose cell wall, while animal cells lack it.
2. Plant cells lack plasma membrane, while animal cells have it.
3. Mature plant cell have a large vacuole, while animal cells have numerous small vacuoles.
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Let A be an m × n matrix and Ban n × m matrix. It is given that determinant ($$I$$m + AB) = determinant ($$I$$n + BA), where $$I$$k is the k × k identity matrix. Using the above property, the determinant of the matrix given below is
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With reference to the cell, consider the following statements: 1. Each cell acquires its structure and ability to function because of the organization of its membrane and organelles in specific ways.  2. Cells are enclosed by a plasma membrane composed of lipids and proteins. 3. Most plant cells have large membranous organelles called plastids, which are of two types – chromoplasts and leucoplasts. Which of the above statement is/are correct?