Contents
Photosynthesis test questions
- What is the role of chlorophyll?
- Which useful energy conversion is carried out by chlorophyll?
- What are the products of the light reactions?
- In photosynthesis, what is ATP required for?
- In which cell organelles does carbon fixation occur?
What is photosynthesis multiple choice?
Photosynthesis is the process by which plants, algae and some bacteria use sunlight, carbon dioxide and water to prepare their food. This is a biogeochemical process in which light energy is converted into chemical energy.
What is photosynthesis questions and answers?
Answer: Photosynthesis is the process in which green plants use sunlight to make their own food. Photosynthesis requires sunlight, chlorophyll, water, and carbon dioxide gas as raw materials.
Which is the first step in photosynthesis multiple choice question?
The first step in photosynthesis is the light reaction or photochemical reactions resulting in the formation of ATP and NADPH, which are later utilised in the biosynthesis process.
What Colour is chlorophyll?
Chlorophyll is a pigment that gives plants their green color, and it helps plants create their own food through photosynthesis.
Which substance is not used in photosynthesis?
So, the correct answer is ‘Iodine solution‘.
Which gas is released during photosynthesis?
Within the plant cell, the water is oxidized, meaning it loses electrons, while the carbon dioxide is reduced, meaning it gains electrons. This transforms the water into oxygen and the carbon dioxide into glucose. The plant then releases the oxygen back into the air, and stores energy within the glucose molecules.
Which light is most important for photosynthesis?
The majority of green light is useful in photosynthesis. The relative quantum efficiency curve (Photo 1) shows how efficiently plants use wavelengths between 300 and 800 nm. Green light is the least efficiently used color of light in the visible spectrum.
What is the name of the yellow pigment in leaves?
Xanthophylls are yellow pigments, and carotenoids give leaves an orange color. Photosynthesis also uses these pigments during the summer, but chlorophyll, a stronger pigment, overpowers them. These pigments take more time to break down than chlorophyll does, so you see them become visible in fall leaves.
Why photosynthesis is called dark reaction?
Instead, dark reaction uses ATP and NADPH to produce energy molecules. No photosystem is required. Photolysis of water does not occur. So, the dark reaction in photosynthesis is called so because it does not require light energy.
Why do plants appear green?
The colours of visible light form a colour wheel. Within that wheel the colour an object appears to be is the colour complementary to the one it most strongly absorbs. As such, plants look green because they absorb red light most efficiently and the green light is reflected.
Who is the inventor of photosynthesis?
Jan Ingenhousz, (born December 8, 1730, Breda, Netherlands—died September 7, 1799, Bowood, Wiltshire, England), Dutch-born British physician and scientist who is best known for his discovery of the process of photosynthesis, by which green plants in sunlight absorb carbon dioxide and release oxygen.
What are the 3 reactants of photosynthesis?
Photosynthesis requires sunlight, carbon dioxide, and water as starting reactants (Figure 5.5). After the process is complete, photosynthesis releases oxygen and produces carbohydrate molecules, most commonly glucose.
What is the second phase of photosynthesis called?
Carbon atoms end up in you, and in other life forms, thanks to the second stage of photosynthesis, known as the Calvin cycle (or the light-independent reactions).
What are thylakoid stacks called?
In most higher plants, the thylakoids are arranged in tight stacks called grana (singular granum). Grana are connected by stromal lamellae, extensions that run from one granum, through the stroma, into a neighbouring granum.
Which chlorophyll is blue?
blue-green algae
contain only one form of chlorophyll, chlorophyll a, a green pigment. In addition, they contain various yellowish carotenoids, the blue pigment phycobilin, and, in some species, the red pigment phycoerythrin.
What sugar is formed in photosynthesis?
Photosynthesis happens in small compartments within the plant cells, called chloroplasts. In a two-step process, plants obtain chemical energy from sunlight. The collected energy is used in a second reaction to produce the sugar glucose.
What are the 4 types of chlorophyll?
There are four types of chlorophyll: chlorophyll a, found in all higher plants, algae and cyanobacteria
chlorophyll b, found in higher plants and green algae
chlorophyll c, found in diatoms, dinoflagellates and brown algae
and chlorophyll d, found only in red algae.
What two chemicals are used in photosynthesis?
During photosynthesis, light energy converts carbon dioxide and water (the reactants) into glucose and oxygen (the products).
- Photosynthesis is the process plants use to make their own food.
- The reactants of photosynthesis are carbon dioxide and water.
What is the final product of photosynthesis?
Though the final product of photosynthesis is glucose, the glucose is conveniently stored as starch.
What two chemicals are required for photosynthesis?
Carbon dioxide, water and light are all needed for photosynthesis to take place.
What are the holes in a leaf called?
Stomata (noun, “STO-mah-tah”, singular “stoma”) These are the small pores in plant stems or leaves that allow carbon dioxide in and oxygen and water vapor out. Each tiny hole is surrounded by a pair of cells called guard cells.
What is the highest rate of photosynthesis?
The maximum rate of photosynthesis occurs in the red and blue regions of the visible light as seen in the absorption spectra of chlorophyll a and b.
What type of organism uses photosynthesis?
All plants with green leaves, from the tiniest mosses to towering fir trees, synthesize, or create, their own food through photosynthesis. Algae, phytoplankton, and some bacteria also perform photosynthesis. Some rare autotrophs produce food through a process called chemosynthesis, rather than through photosynthesis.
Which pigments are used in photosynthesis?
Chlorophyll, the primary pigment used in photosynthesis, reflects green light and absorbs red and blue light most strongly. In plants, photosynthesis takes place in chloroplasts, which contain the chlorophyll.
What colors are used in photosynthesis?
To perform photosynthesis, violet light is the most important color, and it’s from these wavelengths that plants get most of their energy. The reason for this is because out of the visible spectrum, red light is the longest wavelength light that the photosynthesis process can use, but it has the least energy.
Where is chlorophyll located?
Chlorophyll is located within the thylakoid membrane of the chloroplast. Chlorophyll is found in virtually all photosynthetic organisms, including green plants, cyanobacteria, and algae.
What color is chlorophyll b?
Chlorophyll a is blue-green, chlorophyll b is yellow-green, carotene appears bright yellow, and xanthophyll is pale yellow-green. (You may only see two of these pigments.)
What colour is xanthophyll?
Xanthophyll (pronounced ZAN-tho-fill) – yellow. Carotene (pronounced CARE-a-teen) – gold, orange. Anthocyanin (pronounced an-tho-SIGH-a-nin) – red, violet, can also be bluish.
Why is chlorophyll green?
Chlorophyll absorbs light most strongly in the blue portion of the electromagnetic spectrum, followed by the red portion. Conversely, it is a poor absorber of green and near-green portions of the spectrum, hence the green color of chlorophyll-containing tissues. 9.