Biology ยท Science General

Cell Biology and Structure

3,062 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

Which of the following is a correct difference between a plant cell and an animal cell?

  1. An animal cell is larger than a plant cell.

  2. A large vacuole is centrally located in animal cells but many small vacuoles are scattered in plant cells.

  3. Plant cells can withstand much greater changes in surrounding medium than animals cells.

  4. In plant cells, nuclear membrane is absent but cell wall is present whereas it is opposite in animal cells.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Plant cells have rigid cell wall which helps them to withstand much greater changes in surrounding medium.

Multiple choice

Which of the following is false for a biological cell?

  1. It is the smallest unit of life which is capable of replicating itself.

  2. Cells divide to produce cells of various kinds.

  3. All living beings possess cells.

  4. No cell can be seen with a naked eye.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

An egg is also a single cell which can be seen with a naked eye.

Multiple choice

Collenchyma is

  1. living and contains protoplasm

  2. dead and hollow

  3. dead and filled with reserve food

  4. living and contains no reserve food

  5. -
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Collenchyma cells have thin primary walls with some areas of secondary thickening. Collenchyma provides extra structural support, particularly in regions of new growth.

Multiple choice

Centrosome is not present in

  1. cells of higher plants

  2. cells of lower plants

  3. cells of higher animals

  4. cells of lower animals.

  5. -
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Centrosome is required in the formation of centrioles which is required during cell division mainly in animals.It is absent in plants.