Name of the organelle:chroloplast B. name of the organelle: mitochondria ¡.food processor. 2. food Producer
Answers
Answer:
hope it is helpful
Explanation:
Practice
Explanations (4)
Hannah Bonville
Text
3
What Are Plastids?
Plastids are a group of sac-like organelles found in plant cells. They all have a double membrane and, conveniently, names that end in "plast". There are three types of plastids: chloroplasts, chromoplasts, and leucoplasts.
In general, plastids are responsible for the production and storage of pigments or food in plant cells.
Here's a quick look at each plastid and its function in the plant cell:
Chloroplasts contain chlorophyll (green pigment) that absorbs sunlight in photosynthesis. They produce and store glucose. Chromoplasts contain carotenoids (red, oragen, and yellow pigments). They are found in flowers and fruit. Leucoplasts contain no pigment. They are used to store starch.
Image source: By LadyofHats [Public domain], via Wikimedia Commons
While there are three types of plastids, the one you really need to be familiar with is the chloroplast.
Their job is to absorb sunlight and use it (along with water and carbon dioxide) to produce glucose, a simple sugar. The process in which chloroplasts convert absorbed light energy into sugar is called photosynthesis.
Chloroplasts in plant cells
The little green shapes inside each of these cells are chloroplasts. They are green because chloroplasts are full of the pigment chlorophyll, which itself is green.
Image source: By Kristian Peters -- Fabelfroh CC BY-SA 3.0, via Wikimedia Commons
Chloroplasts are also the reason why plants are green. They contain a pigment (almost like a dye) called chlorophyll, which is green.
(To help myself remember this, I always think, "chloroplasts are phylled ("filled") with chlorophyll.)
We also need to talk about the parts of a chloroplast. Let's look at a picture first.
Chloroplast structure
Image source: By Kelvinsong (modified by expii) CC BY-SA 3.0, via Wikimedia Commons
This picture shows a chloroplast (looks like a green potato) with part of the top carved off so we can see the inside.
Here's what's inside:
Chloroplast structure
Image source: By It'sJustMe (modified by expii) [Public domain], via Wikimedia Commons
Inside, chloroplasts have stacks of pancake-like sacs. A single pancake is called a thylakoid. A stack of these thylakoids makes a structure called a granum (plural: grana). The thylakoids are green because this is where chlorophyll is stored.
There is a watery liquid surrounding all of the stacks. This liquid is called stroma.
It's important to know these parts of a chloroplast because different reactions of photosynthesis occur in each location.
Key Vocabulary:
Plastid
Organelle
Chloroplast
Pigment
Chlorophyll
Photosynthesis
Stroma
Thylakoid
Granum (plural: grana)
Report
Share
3
Like
Related Lessons
Good Solvent (Water) — Properties & Examples
Processing Energy With Mitochondria (Animals) — Overview
High Specific Heat (Water) — Properties & Examples
What Is Bioenergetics? — Definition & Overview
View All Related Lessons
Aaron Lauer
Text
2
Structure of Chloroplasts
Plastids are a group of organelles found within plants and algae. They are thought to have originated from bacteria that were consumed by eukaryotic cells. Plastids are no longer considered alive. They do contain their own unique DNA in the form of small circular rings, much like bacteria.
The most common plastid is the chloroplast.
Chloroplasts are responsible for converting light energy into chemical energy during photosynthesis. Chloroplasts also produce oxygen and large organic compounds (glucose).
Chloroplasts have different membranes and fluids. They contain stacks of thylakoids.
Image source: By CNX OpenStax CC BY 4.0, via Wikimedia Commons
A chloroplast has an inner and an outer membrane. The inner membrane is the same shape as the outer membrane, just slightly smaller. The outer membrane is freely permeable to molecules. The inner membrane is selectively permeable, much like the cell membrane.