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BIOLOGY [5 Mark Question Answer]

Cell The Structure and Functions · ICSE STD 6 (ICSE - English Medium). 3 questions.

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[5 Mark Question Answer]

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Question 15 Marks
List the major differences between a plant cell and an animal cell
Answer
plant cell animal cell
Cell is comparatively larger with distinct outlines Size is small with less distinct outlines
Has a definite and rigid cell wall Cell wall absent
Has negligible amount of cytoplasm Cytoplasm fills almost the entire cell
Cytoplasm is not very dense Cytoplasm is granular and relatively dense
Contains plastids Do not contain plastids
No centrosome Centrosomes are present
Have prominent one or more vacuoles Have temporary vacuoles which are small and concerned with secretion or excretion
Has simple golgi apparatus composed of units called dictyosomes Have complex and prominent golgi apparatus
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Question 25 Marks
Briefly describe the three essential basic parts of a cell
Answer
The essential basic parts of a cell are:

  1. Cell membrane
  2. Cytoplasm
  3. Nucleus

1. Cell membrane: It is a very thin, delicate and flexible membrane which surrounds each cell. It is also called plasma membrane. It consists of fine pores which allow only certain molecules to pass through it and prohibit the others and therefore, due to its function, also called selectively permeable membrane.
2. Cytoplasm: This is the living portion of the cell which is a semi-liquid, translucent and colourless liquid. It is the portion of the cell where major functions of the cell are carried out through various finer parts of the cell. The finer structures which are contained in this are called the cell organelles.
3. Nucleus: The small spherical dark coloured body usually located in the centre of the cell. It is the most important part of the cell which regulates and co-ordinates various life processes. Its major role is during cell division. It contains hereditary factors called the genes.

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Question 35 Marks
Match the name of the organelle given in Column A with its function given in Column B.
Column A (Organelle) Column B (Function)
1 leucoplast a help in cell division
2 nucleus b transport of material
3 ribosomes c making food
4 mitochondria d digesting foreign bodies
5 endoplasmic reticulum e storage of starch and proteins
6 golgi bodies f making the cell turgid
7 chloroplast g making proteins
8 centrosome h controlling all the vital activities of a cell
9 vacuole i releasing energy
10 lysosomes j synthesis of cell wall in a plant cell
Answer
Column A (Organelle) Column B (Function)
1 leucoplast e storage of starch and proteins
2 nucleus h controlling all the vital activities of a cell
3 ribosomes g making proteins
4 mitochondria i releasing energy
5 endoplasmic reticulum b transport of material
6 golgi bodies j synthesis of cell wall in a plant cell
7 chloroplast c making food
8 centrosome a help in cell division
9 vacuole f making the cell turgid
10 lysosomes d digesting foreign bodies
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[5 Mark Question Answer] - BIOLOGY STD 6 Questions - Vidyadip