Which one of the following is the correct sequence in increasing complexity?
- (a)Protein – Organism – Tissue – Organ
- (b)Protein – Organ – Tissue – Organism
- (c)Protein – Organism – Organ – Tissue
- (d)Protein – Tissue – Organ – Organism
Correct — D, Protein – Tissue – Organ – Organism. In order of increasing complexity, a protein is a molecule built from amino acids; many cells of one kind form a tissue; different tissues combine to form an organ; and organs working together make up the whole organism. So the ascending sequence is protein, then tissue, then organ, then organism.
- (a)Protein – Organism – Tissue – Organ — This places the whole organism second, but the organism is the most complex level, not one of the least.
- (b)Protein – Organ – Tissue – Organism — This puts the organ before the tissue, but tissues combine to build organs, not the reverse.
- (c)Protein – Organism – Organ – Tissue — This inverts the order almost entirely, ending at tissue instead of at the organism.
Biological organisation runs from simple to complex — atoms, then molecules (such as proteins), then cell organelles, cells, tissues, organs, organ systems and finally the whole organism, and beyond that populations and ecosystems. A tissue is a group of similar cells doing one job, an organ is made of several tissues, and an organism is the complete living being formed of coordinated organ systems.
The sequence is a simple ordering from smaller to bigger. The only rule you need is that tissues come before organs (tissues build organs) and the organism is the top level — that alone eliminates every option except (d).
- A protein is a macromolecule built from amino acids — a molecular level of organisation.
- A tissue is a group of similar cells performing a common function.
- An organ is formed of two or more tissue types working together.
- The organism is the complete living individual, formed of organ systems.
- Placing the organ before the tissue — tissues combine to form organs.
- Treating the organism as an early, simple level rather than the most complex one.
- Forgetting that a protein is a molecule, a level below the cell.
These questions ask you to order the levels of organisation from simple to complex — remember molecule, then cell, then tissue, then organ, then organism.
No directly related past PYQ was found.
- practice — not a real PYQ
Which one of the following is the correct ascending order of biological organisation?
- (a)Cell – Tissue – Organ – Organ system
- (b)Organ – Tissue – Cell – Organism
- (c)Tissue – Cell – Organ – Organism
- (d)Organ system – Organ – Tissue – Cell
Answer(a) Cell – Tissue – Organ – Organ system — each level is built from the one before it.
- practice — not a real PYQ
A group of similar cells performing a common function is called a(n)
- (a)Organ
- (b)Tissue
- (c)Organ system
- (d)Organism
Answer(b) Tissue — similar cells grouped for one function; tissues then build organs.