Table of Contents
Which organelle plays a vital role in photosynthesis?
In plants, photosynthesis takes place in chloroplasts, which contain the chlorophyll. Chloroplasts are surrounded by a double membrane and contain a third inner membrane, called the thylakoid membrane, that forms long folds within the organelle.
What does the chloroplast do?
In particular, organelles called chloroplasts allow plants to capture the energy of the Sun in energy-rich molecules; cell walls allow plants to have rigid structures as varied as wood trunks and supple leaves; and vacuoles allow plant cells to change size.
How do chloroplasts perform photosynthesis?
Chloroplasts absorb sunlight and use it in conjunction with water and carbon dioxide gas to produce food for the plant. Chloroplasts capture light energy from the sun to produce the free energy stored in ATP and NADPH through a process called photosynthesis.
Who discovered chloroplast?
Discovery. The first definitive description of a chloroplast (Chlorophyllkörnen, “grain of chlorophyll”) was given by Hugo von Mohl in 1837 as discrete bodies within the green plant cell.
What does Golgi apparatus do?
A Golgi body, also known as a Golgi apparatus, is a cell organelle that helps process and package proteins and lipid molecules, especially proteins destined to be exported from the cell.
Whats the process of photosynthesis?
photosynthesis, the process by which green plants and certain other organisms transform light energy into chemical energy. During photosynthesis in green plants, light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds.
What is Thylakoid and grana?
Grana and thylakoid are two structures in chloroplasts of plants. Chloroplasts are the organelles involved in the photosynthesis of plants. The main difference between grana and thylakoid is that grana are the stacks of thylakoids whereas thylakoid is a membrane-bound compartment which is found in chloroplast.
Who discovered lysosomes when?
Christian de Duve
Christian de Duve, whose laboratory in Louvain discovered lysosomes in 1955 and defined peroxisomes in 1965, died at his home in Nethen, Belgium at the age of 95, on May 4, 2013.
Who discovered the mitochondria?
Mitochondria, often referred to as the “powerhouses of the cell”, were first discovered in 1857 by physiologist Albert von Kolliker, and later coined “bioblasts” (life germs) by Richard Altman in 1886. The organelles were then renamed “mitochondria” by Carl Benda twelve years later.
What is function of ribosome?
A ribosome functions as a micro-machine for making proteins. Ribosomes are composed of special proteins and nucleic acids. The TRANSLATION of information and the Linking of AMINO ACIDS are at the heart of the protein production process.
Why is Volvox important to biology?
Volvox also exhibit differentiation between somatic (non-sex cells) and reproductive cells, a phenomenon considered by some biologists to be significant in tracing the evolution of higher animals from microorganisms. Volvox movementMotile colonies of Volvox aureus.
What is the function of the flagella in Volvox?
The somatic cells of a Volvox colony each feature two flagella (whiplike appendages), several contractile vacuoles (fluid-regulating organelles), a single chloroplast (the site of photosynthesis), and an eyespot used for light reception.
What are the somatic cells of Volvox?
Volvox. The somatic cells of a Volvox colony each feature two flagella (whiplike appendages), several contractile vacuoles (fluid-regulating organelles), a single chloroplast (the site of photosynthesis), and an eyespot used for light reception. Neighbouring cells are often joined together by strands of cytoplasm,…
How many cells are in a Volvox colony?
Volvox form spherical or oval hollow colonies that contain some 500 to 60,000 cells embedded in a gelatinous wall and that are often just visible with the naked eye. VolvoxColonies of Volvox globator contain thousands of individual cells. Each cell usually has two flagella that propel it through substances such as water.