SSC CGL
Insurance
NABARD
CAPF
RBI Assistant
IBPS PO
SBI PO
Shorts SSC CGL Practice
More Articles
- Photosynthesis
- Biology-Introduction
- What is Living
- Classification of Organism
- Study of Cell - Cytology
- Genetics
- Sex Determination in Human
- Organic Evolution
- Classification of Plantae / Virus & Bacteria
- Plant Morphology
- Plant Tissue
- Plant Hormones
- Plant Diseases
- Ecology/ Nitrogen cycle
- Pollution
- Classification of Animal Kingdom
- Animal Tissue
- Human Blood
- System of the Human Body
- Nutrients
- Biotechnology & Applied Biology
- Human Diseases
- Medicinal Discoveries, Important information and Facts
Photosynthesis
Photosynthesis is a process in which green plant syntheses their food like glucose from carbondioxide and water in presence of sun light with the help of chlorophyll.
Carbon dioxide, water, chlorophyll and sunlight are necessary for photosynthesis.
- Terrestrial plants takes CO2 from atmosphere whereas aquatic plants use carbon dioxide dissolve in water.
- Water enters into the cells of the leaves through osmosis and CO2 through diffusion from atmosphere or release during respiration.
- Water necessary for photosynthesis is absorbed by the roots. Oxygen produced during photosynthesis is due to photolysis of water.
- The green colour of the plants is due to the presence of chlorophyll. Chlorophyll are photoreceptor molecule, which trap the solar energy. There are different type of chlorophyll molecule like ‘a’, ‘b’, ‘c’, ‘d’ & ‘e’. Chlorophyll ‘a’ & ‘b’ are most common and are found in plant.
- Photosynthesis covert light energy into chemical energy.
- There is an atom of magnesium in the centre of chlorophyll.
- Chlorophyll absorbs the violet, blue and red colours of light.
The rate of photosynthesis is maximum in red light and is minimum in violet light. - Green light is least effective in photosynthesis.
- The process of photosynthesis is a reaction of oxidation and reduction. Oxidation of water takes place producing oxygen and reduction of carbon dioxide takes place forming glucose.
The stages of photosynthesis
1. Photochemical reaction or light reaction and
2. Dark chemical reaction
1. Photochemical reaction:
This reaction is completed in the grana of the chlorophyll. This is also called Hill reaction. In this process breaking down of water takes place releasing hydrogen ion and electron. For photolysis of water, energy is received from the light. At the end of this process, ATP is formed from ADP & P.
2. Dark chemical reaction:
This reaction takes place in the storma of chlorophyll. In this reaction reduction o carbon dioxide takes place and sugar or starch are formed. It is also known as Calvin Benson cycle.
- Root pressure is measured by auxanometer.
- The cell which are closely associated and interacting with guard cells are subsidiary cells.
- Conversation of starch to sugar is essential for stomatal opening.
- Cactus plant keep its stomata open during night and close during day time.
- The molecule which mainly absorb light energy and convert it to chemical energy in photosynthesis are chlorophyll ‘a’.
- Leghaemoglobin is a protein pigment present in the nodule of roots help in protecting nitrogenase from oxygen molecule.
More Related Articles
Biology: Branch of science in which scientific study of life is done. Bios = Life and Logos = Study. Therefore study of life is called Biology. The term biology was first coined by Lamarck an
by
ExamGuruThe word living cannot be defined. Living organism mostly uses solar energy. There are certain characters by which living can be distinguished from non living. 1. Growth: Increase in the numb
There are millions of organisms. It is impossible to study each individual separately. Classification means to categories organism into different groups. Study of an individual of a group gives us
Study of cell is called cytology. Cell-Cytology, Main features & function, Types of cell, Plant cell, Animal cell, Cell structure, Protoplasm, Cell membrane, Chromosome, DNA, RNA, Protoplasm,
Transmission of character from one generation to next generation is called heredity. The process of transfer of hereditary character from generation to generation is called genetics. The name g
In human male sex chromosome is ‘XY’, where as in female sex chromosome is XX. During gamete formation in male half of the sperm contain ‘X’ chromosome while other half contain
More and more creation of organism by gradual change from low categories organism to higher organism is called organic evolution. There are several evidence regarding organic evolution. Homologo
The study of different types of trees & plants is called Botany. Theophrastus is called the father of Botany. Aristotle is known as father of biology. In the year 1883, Eicher has classifie
Morphology: The study of forms and features of different parts of plants like roots, stems, leaves, flowers, fruits etc is called Morphology. Root Root is the descending part of the plant whi
Tissue: The group of cells having common origin, and usually perform a common function. Types of plant tissue A. Meristematic tissue: Growing regions of the plants are called Meristem.
