Biology · Science General

Cell Biology and Structure

3,221 Questions

Cell biology focuses on the structure and function of cellular organelles. Key topics include cellular respiration, DNA inheritance, and energy production. These fundamental biology concepts are crucial for medical entrance and state service examinations.

Cell organelles functionsCellular respiration sitesDNA and ribosomesAnimal cell structurePlant cell components

Cell Biology and Structure Questions

Multiple choice

A false appearance of arrangement of nuclei is observed in

  1. stratified epithelium

  2. pseudostratified epithelium

  3. simple ciliated epithelium

  4. simple cuboidal epithelium
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In pseudostratified epithelium, the nuclei appear to be arranged in more than one layer. This is a false appearance.

Multiple choice

In comparison to the plants, animals do not have a demarcation between the dividing and non-dividing regions because

  1. cell growth in animals is uniform

  2. cell growth in plants is uniform

  3. Cell growth in animals is localised

  4. Cell growth in animals is non-uniform

  5. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The growth in plants is limited to certain regions, thus meristmatic tissue or dividing tissue in plants is localised to these regions. However, cell growth in animals is more uniform. So, there is is no demarcation of dividing and non-dividing regions in animals.

Multiple choice

A student is asked to observe a plant cell under the microscope and to list any five characteristics of the cell. Which of the following listed characteristics is incorrect?

  1. Presence of cell wall

  2. Presence of nuclear material without nuclear membrane

  3. Presence of genetic material

  4. Presence of cell membrane
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A plant cell is said to be eukaryotic and it possesses a well defined nuclear membrane around the nucleus and encloses the genetic material.