Question

Which of the following structures is present in mitochondria?
A)Oxysomes
B)Dictyosomes
C)Quantasomes
D)Polysomes

Answer 1

Hint: Mitochondria is a double membrane-bound organelle mostly found in eukaryotic organisms. Mitochondria is known as “Powerhouse of the cell”. It performs various functions such as- energy production and conversion, heat production, storage of calcium ions, cellular proliferation regulation. Some additional functions are steroid synthesis, hormonal signaling and so on.

Complete answer:
Option A- Oxysomes
Oxysomes are found in mitochondria. It is the small round body which is present in the folds of cristae in the inner mitochondrial membrane. Oxysomes are used for ATP production through the process of Oxidative phosphorylation and are therefore called as F0 – F1 particles.

Option B- Dictyosomes
These are flat, net-like, membrane-bound structures known as cisternae. These comprise the Golgi apparatus. Their main function is packaging and storage of materials like proteins.

Option C- Quantasomes
These are the particles present in the thylakoid membrane of chloroplast. The process of photosynthesis takes place inside them. These are made up of lipids and proteins. These are the functional units of chloroplast.

Option D- Polysomes
A polysome is also known as polyribosome or ergasome. These are a group of ribosomes which are bound to an mRNA molecule like “beads” on a “thread”. Their main function is to translate mRNA into proteins.

Thus, the correct option is Option A- Oxysomes.


Note:
A cell is the basic functional unit of life. It is the smallest unit and is often referred to as “building blocks of life”. The study of a cell is called Cytology. A cell consists of three main parts- cell membrane, nucleus, and cytoplasm. The nucleus contains the genetic material, the cell membrane provides the shape and protection to the cell, and the cytoplasm consists of various organelles such as mitochondria, golgi apparatus, lysosomes, cytoplasm and nucleus.