MICROANATOMY

INTRODUCTION TO MICROSCOPY CELL BIOLOGY

CELL JUNCTIONS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The endosymbiosis hypothesis proposes that
A
a large cell engulfed and digested a smaller cell, exposing its enzymes for use by the larger cell.
B
two cells merged into one cell, improving the enzyme function of the new cell.
C
two cells were juxtaposed and one benefited from the other.
D
a small cell lived inside a larger cell to the benefit of both cells.
Explanation: 

Detailed explanation-1: -Question: The endosymbiosis hypothesis proposes that a small cell lived inside a larger cell to the benefit of both cells. two separate cells worked cooperatively and one benefited from the other. a large cell engulfed and digested a smaller cell, exposing its enzymes for use by the larger cell.

Detailed explanation-2: -According to the endosymbiosis theory, the host cell engulfed the bacterium, and instead of digesting it as food, it negotiated a functional relationship that enabled the host cell/endosymbiont to utilize oxygen in energy metabolism.

Detailed explanation-3: -The Edosymbiotic theory describes how mitochondria and chloroplasts were once prokaryotic organisms. These prokaryotic organisms were engulfed and taken into another organism, forming a symbiotic relationship resulting in the current eukaryotic cell. Thus the answer is mitochondria, answer choice B.

There is 1 question to complete.