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 not a property of organelles?

  1. They coordinate to produce the cell.

  2. They are very small sized.

  3. They are mostly internal.

  4. They are formed of tissues and tissues comprise of cells.

  5. They are found in all eukaryotic cells.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This is the correct option as this is not a property of organelles. An organelle is made up of micromolecules and macromolecules.

Multiple choice

Cell wall is a rigid wall that lies outside the plasma membrane. Which of the following is not a function of a cell wall?

  1. It regulates the cell cycle.

  2. It has narrow pores through which fine strands of cytoplasm are able to pass.

  3. It permits the plant to become turgid.

  4. It provides mechanical strength and support to the cell.

  5. It is freely permeable to water and substances in solution.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This is the correct answer as this is not a function of a cell wall. The nucleus regulates the cell cycle.

Multiple choice

Which of the following statements is/are false?

a. Nucleolus is known as the factory of ribosomes. b. Nucleus is concerned with the transmission of hereditary traits from the parent to offspring. c. Golgi apparatus is helpful in protein synthesis in the cytoplasm.

  1. Only a

  2. Only a and b

  3. Only b

  4. Only c
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This is the correct option as this statement is false. Ribosomes are helpful in protein synthesis in the cytoplasm.

Multiple choice

Which of the following is NOT a characteristic of centrosome?

  1. It is present in animal cells only.

  2. It contains one or two centrioles.

  3. It participates in protein synthesis.

  4. It forms spindle fibres with the help of asters.

  5. It has a central role in making cilia and flagella
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Centrosome does not synthesise proteins. It only initates and regulates the cell division.