Which of the following could be a nucleotide of DNA deoxyribose phosphate group thymine?
Answer: Deoxyribose + phosphate group + thymine.
What 3 parts make up a DNA nucleotide?
The building blocks of DNA are nucleotides, which are made up of three parts: a deoxyribose (5-carbon sugar), a phosphate group, and a nitrogenous base (Figure 9.3). There are four types of nitrogenous bases in DNA.
What is a deoxyribose nucleotide?
Deoxyribose is the five-carbon sugar molecule that helps form the phosphate backbone of DNA molecules. The bonds between nucleotides are known as phosphodiester bonds because they take place between the phosphate group of one nucleotide and the deoxyribose sugar of the next nucleotide.
Why is it called Deoxyribose?
Infobox references. Deoxyribose, or more precisely 2-deoxyribose, is a monosaccharide with idealized formula H−(C=O)−(CH2)−(CHOH)3−H. Its name indicates that it is a deoxy sugar, meaning that it is derived from the sugar ribose by loss of an oxygen atom.
Where is the nucleotide in DNA?
The sugar and phosphate group make up the backbone of the DNA double helix, while the bases are located in the middle. A chemical bond between the phosphate group of one nucleotide and the sugar of a neighboring nucleotide holds the backbone together.
What nucleotide is not found in DNA?
Which of these nucleotide bases is NOT present in RNA: Cytosine, Thymine, Guanine, Adenine, Uracil. The correct answer is: Thymine.
What makes up the backbone of DNA?
DNA consists of two strands that wind around each other like a twisted ladder. 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), or thymine (T).
What makes up the steps of DNA?
The inside of the molecule, the “steps” of the staircase, are made of the nucleotide bases Cytosine, Guanine, Adenine, and Thymine. To replicate, the DNA molecule unzips along the hydrogen bonds. The single stranded templates dictate which bases get laid down. In this way, one DNA strand can become two.
What makes up the backbone of DNA quizlet?
What is the “backbone” of DNA composed of? Phosphate molecules and deoxyribose sugar. DNA backbones are made up of deoxyribose, a pentose sugar. These sugars are connected via a phosphodiester bond.
What are the four bases in DNA?
Adenine, thymine, cytosine and guanine are the four nucleotides found in DNA.
Why does adenine only pair with thymine?
Adenine and Thymine also have a favorable configuration for their bonds. They both have to -OH/-NH groups which can form hydrogen bridges. When one pairs Adenine with Cytosine, the various groups are in each others way. For them to bond with each other would be chemically unfavorable.
Does adenine always pair with thymine?
In DNA, the code letters are A, T, G, and C, which stand for the chemicals adenine, thymine, guanine, and cytosine, respectively. In base pairing, adenine always pairs with thymine, and guanine always pairs with cytosine.
Why does adenine and thymine have 2 hydrogen bonds?
In the DNA helix, the bases: adenine, cytosine, thymine and guanine are each linked with their complementary base by hydrogen bonding. Adenine pairs with thymine with 2 hydrogen bonds. The higher the temperature at which DNA denatures the more guanine and cytosine base pairs are present.
Can adenine pair with guanine?
In DNA base pairing, adenine always pairs with thymine, and guanine always pairs with cytosine. Adenine is also one of the bases in RNA. There it always pairs with uracil (U).
What is the smallest unit of DNA called?
What are the 3 units of DNA?
DNA is made of chemical building blocks called nucleotides. These building blocks are made of three parts: a phosphate group, a sugar group and one of four types of nitrogen bases. To form a strand of DNA, nucleotides are linked into chains, with the phosphate and sugar groups alternating.
What is a single unit of DNA called?
The basic unit used to make a strand of DNA is called a nucleotide. A single basic unit or “building block” of DNA consists of a sugar , a phosphate group and a base. Sugars are rings of carbon and oxygen atoms.
Which is the correct order of structure from smallest to largest?
It is convenient to consider the structures of the body in terms of fundamental levels of organization that increase in complexity, such as (from smallest to largest): chemicals, cells, tissues, organs, organ systems, and an organism.
What is the correct order of Organisation?
What is the correct order of organization in the body?
The major levels of organization in the body, from the simplest to the most complex are: atoms, molecules, organelles, cells, tissues, organs, organ systems, and the human organism.
What is the correct order of organization?
The biological levels of organization of living things arranged from the simplest to most complex are: organelle, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystem, and biosphere.