Question

Which cell organelles release oxygen?
A. Mitochondria
B. Golgi body
C. Chloroplast
D. Ribosome

Answer 1

Hint:
In a photosynthesizing cell, there are green plastids which carry out the process of photosynthesis, these are known as chloroplasts. As a result of the photolysis of water, the chloroplasts release oxygen. This means Oxygen is a by-product of photosynthesis.

Complete answer:
Option A is Mitochondria. They are membrane-bound cell organelles. They are known for their function of generating chemical energy needed by cells for their biochemical reactions. Chemical energy that is produced by the mitochondria is stored in the form of a small molecule called adenosine triphosphate (ATP).

Option B is Golgi bodies which are present in hundreds of numbers in plant cells. The function of Golgi bodies is transporting, modifying, and packaging proteins and lipids into vesicles for delivery to targeted destinations

Option C - Chloroplasts. These cell organelles conduct photosynthesis. In this process, the photosynthetic pigment known as chlorophyll captures the energy from sunlight, converts it, and stores it in the energy-storage molecules ATP and NADPH. During this process, it frees oxygen from water in plant and algal cells.

Option D is the ribosome. They are cell organelles consisting of RNA and associated proteins. They are found in large numbers in the cytoplasm of cells. Their main function is to bind messenger RNA and transfer RNA to synthesize polypeptides and proteins

So, the correct answer is option C, chloroplast.

Note:
Chloroplast releases oxygen in the Eukaryotic cells. It is a cell organelle that carries photosynthesis. When a photosynthetic cell (plant/protoctist) uses light energy to produce starch, they split a water molecule into one molecule of Oxygen and two molecules of Hydrogen. This whole process which releases oxygen takes place inside the Chloroplast.