Cell Biology and Cell Organisation

Free sample questions

Cell Biology and Cell Organisation — sample Biology questions with answers

1. Question 1

   What cell organelle functions as the 'control centre' of the cell?

   • ANucleus
   • BMitochondria
   • CRibosome
   • DChloroplast

   Answer: A. Nucleus

   The nucleus contains DNA that controls all cellular activities, including protein synthesis and cell division.

2. Question 2

   Which structure is found only in plant cells and not in animal cells?

   • APlasma membrane
   • BCell wall
   • CRibosome
   • DMitochondria

   Answer: B. Cell wall

   The cell wall is a rigid structure composed of cellulose. It is only present in plant cells, whereas animal cells only have a plasma membrane.

3. Question 3

   Which of the following is an example of an organ in the human digestive system?

   • ALarynx
   • BTrachea
   • CLungs
   • DStomach

   Answer: D. Stomach

   The stomach is an organ in the digestive system that digests food mechanically and chemically. The other options are organs of the respiratory system.

4. Question 4

   In animal cells, which organelle is responsible for producing energy through cellular respiration?

   • ANucleus
   • BRibosome
   • CMitochondria
   • DGolgi apparatus

   Answer: C. Mitochondria

   Mitochondria are known as the 'powerhouse of the cell' because they carry out cellular respiration to produce ATP, the cell's energy source.

5. Question 5

   Chloroplasts are found in plant cells and function to?

   • AStore water
   • BControl cell movement
   • CCarry out photosynthesis
   • DProduce protein

   Answer: C. Carry out photosynthesis

   Chloroplasts contain chlorophyll that absorbs light energy for photosynthesis, producing glucose and oxygen.