What is DNA composed of? DNAis a nucleic acid made up of nucleotides joined into long strands or chains by covalent bonds.

What type of molecule is DNA?

DNA is a linear molecule composed of four types of smaller chemical molecules called nucleotide bases: adenine (A), cytosine (C), guanine (G), and thymine (T).

Which type of organic molecule is DNA?

Nucleic Acids. A nucleic acid is an organic compound, such as DNA or RNA, that is built of small units called nucleotides. Many nucleotides bind together to form a chain called a polynucleotide. The nucleic acid DNA (deoxyribonucleic acid) consists of two polynucleotide chains.

What is A DNA molecule quizlet?

DNA is made up of two strands of nucleotides. The nucleotides are made up of a sugar (deoxyribose in DNA), a phosphate, and a nitrogen base. The sugars and phosphates make up the “handrails” (or “backbone”), and are held together by covalent bonds.

Is DNA a nucleic base?

A nucleotide is the basic building block of nucleic acids. RNA and DNA are polymers made of long chains of nucleotides. … The bases used in DNA are adenine (A), cytosine (C), guanine (G), and thymine (T). In RNA, the base uracil (U) takes the place of thymine.

What is structure of DNA quizlet?

DNA is structured in a double helix, with two strands that twist around each other. Each strand is made of single units called nucleotides, with a sugar-phosphate backbone. Bases join the two strands by hydrogen bonds. Each strand DNA can be made upon millions of base-pairs, and are coiled up to make chromosomes.

Is DNA a monomer or polymer?

And even our DNA is a polymer—it’s made of monomers called nucleotides. The first man-made polymers were actually modified versions of these natural polymers.

What are the parts of a DNA molecule quizlet?

Nucleotides each have three parts: phosphate, sugar molecule, and one of four bases. The bases include: A, (adenine), g (guanine), t (thymine), c (cytosine). The phosphate and sugar molecule bonds form the backbone or hand rail of the DNA (staircase), but the genetic key is in the steps (of the stairs): the bases.

What is the structure of a DNA molecule quizlet?

A DNA molecule consists of two strands that wind around each other like a twisted ladder. Each strand has a backbone made of alternating groups of sugar (deoxyribose) and phosphate groups. Attached to each sugar is one of four bases: adenine (A), cytosine (C), guanine (G), or thymine (T).

What type of molecule is DNA helicase?

DNA helicase belongs to the class of biological molecules known as enzymes, which are biological catalysts.

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Is DNA A nucleic acid?

​Nucleic Acid Nucleic acid is an important class of macromolecules found in all cells and viruses. … Deoxyribonucleic acid (DNA) encodes the information the cell needs to make proteins. A related type of nucleic acid, called ribonucleic acid (RNA), comes in different molecular forms that participate in protein synthesis.

Is DNA A lipid?

Lipids (polymers of lipid monomers) Nucleic acids (DNA and RNA; polymers of nucleotides)

What is a DNA base?

Two nitrogen-containing bases (or nucleotides) that pair together to form the structure of DNA. The four bases in DNA are adenine (A), cytosine (C), guanine (G), and thymine (T). These bases form specific pairs (A with T, and G with C).

Is the gene part of a DNA molecule?

A gene is a segment of DNA that provides the code to construct a protein. The DNA molecule is a long, coiled double helix that resembles a spiral staircase. … A gene consists of a sequence of bases. Sequences of three bases code for an amino acid (amino acids are the building blocks of proteins) or other information.

Which of the following is part of a DNA molecule?

The DNA molecule consists of two strands that wind around one another to form a shape known as a double helix. Each strand has a backbone made of alternating sugar (deoxyribose) and phosphate groups. Attached to each sugar is one of four bases–adenine (A), cytosine (C), guanine (G), and thymine (T).

What is A monomer of A DNA molecule?

The monomers of DNA are called nucleotides. Nucleotides have three components: a base, a sugar (deoxyribose) and a phosphate residue. The four bases are adenine (A), cytosine (C), guanine (G) and thymine (T).

Why is DNA classified as A polymer?

DNA is a polymer because it is a bio-molecule that is made up of monomers. The monomers DNA is made up of are called nucleotides.

What type of polymer is DNA?

DNA is a polymer. The monomer units of DNA are nucleotides, and the polymer is known as a “polynucleotide.” Each nucleotide consists of a 5-carbon sugar (deoxyribose), a nitrogen containing base attached to the sugar, and a phosphate group.

Which best describes the structure of a DNA molecule?

Double helix is the description of the structure of a DNA molecule. A DNA molecule consists of two strands that wind around each other like a twisted ladder. Each strand has a backbone made of alternating groups of sugar (deoxyribose) and phosphate groups.

What is the molecular function of DNA?

DNA contains the instructions needed for an organism to develop, survive and reproduce. To carry out these functions, DNA sequences must be converted into messages that can be used to produce proteins, which are the complex molecules that do most of the work in our bodies.

What is the function of the DNA quizlet?

DNA holds genetic information that determines an organisms traits. DNA contains the instructions for making proteins.

What are the four types of bases found in a DNA molecule quizlet?

What are the four nitrogenous bases found in the DNA molecule? The four nitrogen bases found in DNA are adenine, cytosine, guanine, and thymine.

What is polymerase quizlet?

DNA polymerase – An enzyme that assembles new DNA by copying an existing strand.

What are four types of bases found in a DNA molecule?

ACGT is an acronym for the four types of bases found in a DNA molecule: adenine (A), cytosine (C), guanine (G), and thymine (T). A DNA molecule consists of two strands wound around each other, with each strand held together by bonds between the bases. Adenine pairs with thymine, and cytosine pairs with guanine.

Which part of the DNA molecule contains nitrogen quizlet?

The rungs are made up of the nitrogenous bases. Therefore, the nitrogenous base was the one containing the nitrogen. Another part of the DNA that can be labelled is the Phosphate group found at the sides of the ladder.

What are monomers of DNA quizlet?

Nucleotides are the monomer of DNA. They are made of a 5-carbon sugar (deoxyribose), a phosphate group, and a nitrogenous base bound to the sugar.

What molecule is a nucleotide quizlet?

A nucleotide is a nucleic acid monomer consisting of a nitrogen base, a pentose sugar, and a phosphate group. Nucleotides joined together by covalent bonds called phosphodiester linkages form nucleic acid molecules.

Why is DNA called semi-conservative?

DNA replication is semi-conservative because each helix that is created contains one strand from the helix from which it was copied. The replication of one helix results in two daughter helices each of which contains one of the original parental helical strands.

Why is it called semi-conservative?

This process is known as semi-conservative replication because two copies of the original DNA molecule are produced, each copy conserving (replicating) the information from one half of the original DNA molecule. Each copy contains one original strand and one newly-synthesized strand.

How does helicase separate DNA?

DNA helicase is the enzyme that unwinds the DNA double helix by breaking the hydrogen bonds down the center of the strand. It begins at a site called the origin of replication, and it creates a replication fork by separating the two sides of the parental DNA.

What kind of molecules are DNA and RNA?

The two main types of nucleic acids are DNA and RNA. Both DNA and RNA are made from nucleotides, each containing a five-carbon sugar backbone, a phosphate group, and a nitrogen base. DNA provides the code for the cell’s activities, while RNA converts that code into proteins to carry out cellular functions.