What are the 3 components of a DNA nucleotide?
DNA has three types of chemical component: phosphate, a sugar called deoxyribose, and four nitrogenous bases—adenine, guanine, cytosine, and thymine. Two of the bases, adenine and guanine, have a double-ring structure characteristic of a type of chemical called a purine.
Which of these are components of DNA check all that apply?
Answer: All the options except ribose sugar molecules and uracil are present in the DNA.
What are the 3 parts of a DNA nucleotide and how are they connected to each other?
What are the three parts of a DNA nucleotide, and how are they connected to each other? The three parts are a deoxyribose sugar, a phos- phate group, and a nitrogenous base. The phosphate group and the base are connected to different parts of the sugar.
What are the three main parts of a nucleic acid?
Nucleic acids are giant biomolecules made of monomers called nucleotides. Nucleotides have three components: pentose sugar (5-carbon sugar), phosphate group, and nitrogenous base.
What are the four nitrogenous bases found in DNA?
Attached to each sugar is one of four bases–adenine (A), cytosine (C), guanine (G), or thymine (T). The two strands are held together by hydrogen bonds between the bases, with adenine forming a base pair with thymine, and cytosine forming a base pair with guanine.
What are the 2 types of nitrogenous bases?
There are four nitrogenous bases in DNA, two purines (adenine and guanine) and two pyrimidines (cytosine and thymine). A DNA molecule is composed of two strands.
Can adenine pair with itself?
Adenine always pairs with thymine, and cytosine always pairs with guanine. The pairing nature of DNA is useful because it allows for easier replication. If you know one side of a DNA molecule, you can always recreate the other side. Each base has only one other base it can pair with.
Which base pair is correct in DNA?
A DNA molecule consists of 4 base pairs. They are adenine, guanine, cytosine and thymine—adenosine pairs with thymine using two hydrogen bonds. Thus, the correct base pairing is Adenine-Thymine: option (a).
Are purines single ringed?
A. The purines, adenine and thymine, are smaller two-ringed bases, while the pyrimidines, cytosine and uracil, are larger and have a single ring. The pyrimidines, cytosine and thymine are smaller structures with a single ring, while the purines, adenine and guanine, are larger and have a two-ring structure.
Why can’t adenine pair with adenine?
Two purines will not fit between the strands while two pyrimidines will be too far to bond. Therefore a purine has to make a hydrogen bond with another pyrimidine. Hence adenine makes hydrogen bonds with thymine and guanine makes hydrogen bonds with cytosine.
What bonds are in adenine in DNA?
In DNA, adenine binds to thymine via two hydrogen bonds to assist in stabilizing the nucleic acid structures. Adenine is one of the two purines nucleobases utilized in the process of forming nucleotides of the nucleic acids. Adenine also bonds with Thymine in the DNA structure.