Facilitated diffusion definition biology

1 answer:

4 0

Facilitated diffusion<span> is a type of passive transport. Even though </span>facilitated diffusion<span>involves transport proteins, it is still passive transport because the solute is moving down the concentration gradient. Small nonpolar molecules can easily diffuse across the cell membrane.</span>

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A student examines a cell using a microscope. He sees a nucleus, a cell wall, and chloroplasts. What is one

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Answer:

The correct answer is 3. It could be a plant cell.

Explanation:

A plant cell is a eukaryotic cell which contains a well-defined membrane-bound nucleus and other membrane-bound organelles. The main difference in plant and animal cells is that animal cells do not have cell walls and chloroplast which is found in the plant cells.

So when a cell wall and chloroplast are seen under the microscope then it can be concluded that the cell is a plant cell. In plant cell, chloroplast is that organelle that is responsible for trapping sunlight and do photosynthesis which is required to form glucose. Therefore the correct answer is 3.

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The answer is Chemical Formulas

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Question 3

cricket20 [7]

The chemical bond between hydrogen and oxygen atoms in a water molecule forms by a shared pair of electrons between hydrogen and oxygen

<h3>Further explanation</h3>

Chemical bonds that occur between 2 atoms can consist of:

1. ionic bonding

The bonding that occurs due to electron handover. It can occur in metal and non-metal atoms. To get stability, atoms release or bind electrons to get stable electron regulation from noble gases

2. covalent bonding

The bonding that occurs due to the shared use of electron pairs

The two bound atoms contribute their electrons to produce bonds

Generally occurs in non-metallic elements

In the water molecule itself:

Electron configuration H = 1s²

Electron configuration O = 1s² 2s² 2p⁴

H atoms need 1 electron to be stable like the duplet configuration of the noble gas element He and O atoms need 2 electrons to be stable like Ne

So that the O and H atoms contribute their electrons and covalent bonds are formed

The occurrence of polar covalent bonds of water molecules is the electronegative difference between two bonding atoms.

The attraction of electrons (electronegativity) from O atoms in water molecules causes electrons to be attracted more to O atoms and electrons are not evenly distributed so that negative charge/poles appear on O atoms and positive charge/poles are at 2 Hydrogen atoms

<h3>Learn more</h3>

ionic bonding

brainly.com/question/1603987

type of chemical bond

brainly.com/question/5008811

Lewis structures

brainly.com/question/6085185

Keywwords : chemical bond, ionic bond, covalen bond, water, a shared pair of electrons