All categories

3 years ago

Light absorbing compounds, whether they are found on a painter's brush or in a living cell are known as

Biology

1 answer:

Nitella [24]3 years ago

4 0

Answer:

Pigments

Explanation:

The term pigment derives from the Latin pigmentum, which means "substance that produces color".

Pigments provide color to cells and tissues.

In vegetables, we can find different pigments, such as chlorophyll or carotenoids, among others. Plants use these pigments during the photosynthesis process to absorb sunlight and fixate carbon dioxide. Stem color, flower color, and other tissue colors are defined by pigments on their cells.

Animal cells also have pigments that provide color to tissues like the hair, the skin, or the eyes.

Pigments are, basically, chemical molecules that produce color by the selective absorption of sunlight. They absorb light of certain wavelengths and reflect other wavelengths. The color expressed is the product of the reflection.

Many pigments have other functions, such as catalyze for some reactions. They accelerate or facilitate chemical reactions.

Pigments can be differentiated into two groups:

The ones with nitrogen in their molecules, such as hemoglobin, chlorophyll, biliary pigments, and melanin.
The ones with no nitrogen, such as carotenoids and flavonoids.

You might be interested in

What happens when light energy excites electrons in photosystem II?

Vlada [557]

Answer:

C. Electrons are released into the electron transport system.

Explanation:

Photosynthesis has both light dependent processes and light-independent processes. In the light-dependent reactions, photosystem II is the first protein complex. Photosystem II is present in the thylakoid membrane of plants.

When the photons or light energy hits photosystem II, the free electron excites and released into the electron transport system (series of proteins). The electron then passes through electron transport system and the energy from the electron fuels the hydrogen ions to move against their concentration gradient. Once the energy is utilized, the electron is accepted by photosystem I.

Hence, the correct option is C.

4 0

3 years ago

Read 2 more answers

Homeostasis is ________.

vovangra [49]

Answer:

the tendency of the body to maintain inner balance despite changes in external conditions

8 0

3 years ago

Read 2 more answers

Many motor and sensory functions are primarily controlled by the:

GalinKa [24]

Many of the sensory and motor functions are controlled by the central nervous system and the brain. An example of this would be grabbing a hot pot from the stove. Your brain sends a signal to your hand to tell it to grab the pot. When you grab it your sensory nerves detect that the pot is hot and is burning your hand. The signal it sends back to the brain is one that there is pain and to release the pot.

4 0

3 years ago

In one paragraph explain how plants get their food and what plants use food for.

Anna007 [38]

Answer:

Photosynthesis is defined as the process in which the chlorophyll-containing plant

cells synthesise food in the form of carbohydrates, using carbon dioxide and water

in the presence of solar energy.

Sources of raw materials required for photosynthesis:

(a) Water is taken in from the roots of the plant and is transported to the leaves.

(b) Carbon dioxide from the air enters the leaves through the tiny pores called

stomata .

used to synthesise (prepare) food from carbon dioxide and water.

Thus, photosynthesis can be represented by the following equation.

Explanation:

4 0

3 years ago

One brief stimulus of a skeletal muscle may result in a single isolated contractile event, which is called a twitch. One twitch

Inessa05 [86]

Answer:

These statements are true.

8 0

3 years ago