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4 years ago

HELP WILL GIVE BRAINLY AND 50 POINTS

Biology

1 answer:

OlgaM077 [116]4 years ago

3 0

Answer:

Explanation:

Carbon Bonding

The four covalent bonding positions of the carbon atom can give rise to a wide diversity of compounds with many functions, accounting for the importance of carbon in living things.

Carbon contains four electrons in its outer shell. Therefore, it can form four covalent bonds with other atoms or molecules. The simplest organic carbon molecule is methane (CH4), in which four hydrogen atoms bind to a carbon atom.

However, structures that are more complex are made using carbon. Any of the hydrogen atoms can be replaced with another carbon atom covalent bonded to the first carbon atom. In this way, long and branching chains of carbon compounds can be made . The carbon atoms may bond with atoms of other elements, such as nitrogen, oxygen, and phosphorus . The molecules may also form rings, which themselves can link with other rings . This diversity of molecular forms accounts for the diversity of functions of the biological macro molecules and is based to a large degree on the ability of carbon to form multiple bonds with itself and other atoms.

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Chapter 1: Introduction: Evolution and the Foundations of Biology 1. _______ DNA is composed of building blocks called _____. a.

irina [24]

Answer:

C. Nucleotides

Explanation:

Nucleic acids are macromolecules which are polymers of nucleotides. There are two types of nucleic acids namely: deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). Nucleotides are the building blocks of nucleic acids.

A nucleotide is made up of three components:

- A phosphate group

- A five carbon sugar called pentose sugar. In RNA the sugar is ribose sugar and in DNA the sugar is deoxyribose sugar.

- Nitrogenous bases: There are four different types of bases in DNA: adenine, guanine, cytosine and thymine. In RNA thymine is replaced by uracil. Adenine and guanine are purines whereas cytosine, thymine and uracil are pyrimidines.

Nitrogenous base and sugar together are called nucleoside and when phosphate is also attached then it is called nucleotide.

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Burka [1]

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liq [111]

Answer:

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Explanation:

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dmitriy555 [2]

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Answer:

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Explanation:

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