You are watching: Which of the following structures is found in both plant and animal cells?
Plant cells can be larger than animal cells. The normal range for an animal cell varies from 10 to 30 micrometers while that for a plant cell stretches from 10 to 100 micrometers. Beyond size, the main structural differences between plant and animal cells lie in a few additional structures found in plant cells. These structures include: chloroplasts, the cell wall, and vacuoles.
In animal cells, the mitochondria produces the majority of the cells energy from food. It does not havethe same function in plant cells. Plant cells use sunlight as their energy source; the sunlight must beconverted into energy inside the cell in a process called photosynthesis. Chloroplasts are thestructures that perform this function. They are rather large, double membrane-bound structures (about 5micrometers across) that contain the substance chlorophyll, which absorbs sunlight. Additionalmembranes within the chloroplast contain the structures that actually carry out photosynthesis.
Chloroplasts carry out energy conversion through a complex set of reactions similar to those performed by mitochondria in animals. The double membrane structure of chloroplasts is also reminiscent of mitochondria. The inner membrane encloses an area called the stoma, which is analogous to the matrix in mitochondria and houses DNA, RNA, ribosomes, and different enzymes. Chloroplasts, however, contain a third membrane and are generally larger than mitochondria.
The Cell Wall
Another structural difference between in plant cells is the presence of a rigid cell wall surrounding the cell membrane. This wall can range from 0.1 to 10 micrometers thick and is composed of fats and sugars. The tough wall gives added stability and protection to the plant cell.
Vacuoles are large, liquid-filled organelles found only in plant cells. Vacuoles can occupy up to 90% ofa cell"s volume and have a single membrane. Their main function is as a space-filler in the cell, butthey can also fill digestive functions similar to lysosomes (which are also present in plant cells).
See more: How To Find The Value Of X And Y In A Parallelogram, Types Of Quadrilaterals
Vacuoles contain a number of enzymes that perform diverse functions, and their interiors can be used asstorage for nutrients or, as mentioned, provide a place to degrade unwanted substances.