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Often asked: Which of the following statements best describes the carbon atoms present in a seed-eating bird?

Which atom is present in all organic molecules?

At the base of all organic molecules is the element carbon, whose versatility provides the key to all biomolecule structures. In most organic molecules, a linked chain of carbon atoms forms a backbone to which other atoms attach.

Which element is present in all proteins and all organic molecules?

All living things contain carbon in some form. Carbon is the primary component of macromolecules, including proteins, lipids, nucleic acids, and carbohydrates. Carbon’s molecular structure allows it to bond in many different ways and with many different elements.

Which statement about a methyl functional group is correct?

Which statement about a methyl functional group is correct? A methyl group consists of a carbon bonded to three hydrogen atoms.

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How many electron pairs does carbon share in order to complete its valence?

By forming four covalent bonds, carbon shares four pairs of electrons, thus filling its outer energy level and achieving stability.

What defines a molecule as organic?

Organic Molecule: Any molecule that contains carbon bonded to hydrogen. Hydrocarbon: Any molecule that contains only carbon and hydrogen, and nothing else.

How many organic molecules are there?

The current estimate is around 20 million different organic compounds that we know about.

Which element is only found in proteins?

Proteins contain the elements carbon, hydrogen, and oxygen just as carbohydrates and lipids do, but proteins are the only macronutrient that contains nitrogen. In each amino acid the elements are arranged into a specific conformation around a carbon center.

Which element is present in all proteins?

In addition to carbon, hydrogen, and oxygen atoms, all proteins contain nitrogen and sulfur atoms, and many also contain phosphorus atoms and traces of other elements.

What are the 3 most important molecules on Earth?

The three elements that make up over 99 percent of organic molecules are carbon, hydrogen and oxygen. These three combine together to form almost all chemical structures needed for life, including carbohydrates, lipids and proteins.

Which two functional groups are always found in amino acids?

Carboxyl and amino groups are always found in amino acids.

What functional group is commonly used in cells to transfer energy?

With four electronegative oxygen atoms, phosphate groups are highly reactive, and transfer of a phosphate group from one molecule to another delivers energy to chemical reactions. ATP, the main energy carrier in cells, is composed of three phosphate groups bonded in succession.

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Which of these functional groups is characteristic of alcohol?

Which of these functional groups is characteristic of alcohol? D Hydroxyl groups are characteristic of alcohol.

What are the 4 types of bonds carbon can form?

There are four general types of carbon bonding: single, double, triple and aromatic bonding.

How many valence electrons are present in nitrogen?

Nitrogen has a total of 5 valence electrons, so doubling that, we would have a total of 10 valence electrons with two nitrogen atoms. The octet requires an atom to have 8 total electrons in order to have a full valence shell, therefore it needs to have a triple bond.

How many valence electrons are in an atom of carbon?

When bonded with a full octet (such as in methane) carbon has eight valence electrons (two per covalent bond). Each hydrogen atom has two valence electrons.

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