Class 11 Cell: The Unit of Life worksheet

Sample questions

Real questions from this chapter, as the app sets them. Tap Answer to see the answer and working.

Section A · multiple choice

1. 1.

   The cell theory was proposed by:

   1. Robert Brown
   2. Rudolf Virchow alone
   3. Robert Hooke
   4. Schleiden and Schwann

   Answer

   (d) Schleiden and Schwann

   Virchow added that all cells arise from pre-existing cells

2. 2.

   Which organelle is responsible for making proteins, especially for secretion?

   1. Rough endoplasmic reticulum
   2. Nucleolus
   3. Centriole
   4. Vacuole

   Answer

   (a) Rough endoplasmic reticulum

3. 3.

   The rough endoplasmic reticulum is bounded by:

   1. a double membrane
   2. a triple membrane
   3. no membrane
   4. a single membrane

   Answer

   (d) a single membrane

Section B · short answer

1. 4.

   State the cell theory as modified by Virchow.

   Answer

   All living organisms are made of cells and products of cells, and all cells arise from pre-existing cells.

2. 5.

   Name the organelle responsible for forming basal bodies of cilia and the spindle in animal cells, and say where it is found.

   Answer

   Centriole; animal cells

Section C · long answer

1. 6.

   Describe the structure and function of the nucleus.

   Answer

   A double-membraned nuclear envelope with a perinuclear space and nuclear pores, through which RNA and proteins move. Inside is the nucleoplasm with the nucleolus (site of rRNA synthesis) and chromatin (DNA with histone and other proteins), which condenses into chromosomes during division. It controls the cell’s activities and carries the hereditary information.

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In the app, every Cell: The Unit of Life sheet is new: the app remembers the questions your child has already had and leaves them out. Print the sheet as a PDF, or use notebook mode and write the answers in a notebook.

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