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What is the difference between negative supercoiling and positive supercoiling in DNA structure?
Negative supercoiling refers to the twisting of DNA in the opposite direction of its natural helical structure, resulting in a more compact and twisted form. Positive supercoiling, on the other hand, involves the twisting of DNA in the same direction as its natural helical structure, leading to a more relaxed and unwound form.
Three thing make the structure of a DNA molecule?
The structure of a DNA molecule is made up of three things: a sugar-phosphate backbone, nucleotide bases (adenine, thymine, cytosine, and guanine), and hydrogen bonds that form between the bases. These components form the double helix shape of the DNA molecule.
What is the role of deoxyribose in the structure of DNA and RNA?
Deoxyribose is a sugar molecule that forms the backbone of DNA, while ribose is the sugar molecule in RNA. Deoxyribose helps to provide stability and structure to the DNA molecule by connecting with phosphate groups to form the sugar-phosphate backbone. In RNA, ribose plays a similar role in providing structure to the molecule.
What is DNA, a complex molecule with a double helix shape?
DNA, or deoxyribonucleic acid, is a complex molecule that carries genetic information in the form of a double helix structure.
Within collagen structure re there any prosthetic groups?
No, collagen does not contain any prosthetic groups. It is a fibrous structural protein composed of three intertwining polypeptide chains called alpha helices that form the typical triple helical structure.
Is collagen a secondary or tertiary structure?
Collagen is a primary protein structure, composed of three polypeptide chains that form a unique triple helical structure. This triple helical structure is considered the primary structure of collagen.
Are Nitrogenous bases always located perpendicular to the helical axis?
As far as I know, the polar sugar-phosphate backbones of each strand form the helical scaffold, with the nitrogenous bases in the interior of the molecule, their planes nearly perpendicular to the helical axis. However, I cannot sure that it always does. I am curious that there are some exceptional cases.
Why does the primary structure of a protein coils to form the helical secondary structure?
The coiling of the primary structure of a protein to form the helical secondary structure is due to hydrogen bonding between the amino and carboxyl groups of the amino acids in the polypeptide chain. This stable interaction creates a repeating pattern that results in the formation of an alpha-helix.
What is the meaning of helical?
Of or pertaining to, or in the form of, a helix; spiral; as, a helical staircase; a helical spring.
What is the difference between negative supercoiling and positive supercoiling in DNA structure?
Negative supercoiling refers to the twisting of DNA in the opposite direction of its natural helical structure, resulting in a more compact and twisted form. Positive supercoiling, on the other hand, involves the twisting of DNA in the same direction as its natural helical structure, leading to a more relaxed and unwound form.
Is DNA double-stranded and helical?
DNA in its native form is double-stranded and helical.
What organic molecule form the major structure of the body?
The organic molecules form proteins for the body.
What is helical thickening?
Helical thickening, also known as spiral thickening, is a form of sculpturing. Helical thickenings are part of the S3 layer of the secondary wall.
Three thing make the structure of a DNA molecule?
The structure of a DNA molecule is made up of three things: a sugar-phosphate backbone, nucleotide bases (adenine, thymine, cytosine, and guanine), and hydrogen bonds that form between the bases. These components form the double helix shape of the DNA molecule.
What shape can be said to be 'helical'?
When one uses the term "helical", one is often referring to the shape of a helix or spiral. An object with a spiral or helical shape, is one that has a shape or form similar to the helix.
What is the role of deoxyribose in the structure of DNA and RNA?
Deoxyribose is a sugar molecule that forms the backbone of DNA, while ribose is the sugar molecule in RNA. Deoxyribose helps to provide stability and structure to the DNA molecule by connecting with phosphate groups to form the sugar-phosphate backbone. In RNA, ribose plays a similar role in providing structure to the molecule.
How are proteins involved with contractile elements?
Fibrous proteins form due to crosslinks between collagen molecules (myosin and actin). Collagen consists of 3 helical polypeptides wound around each other to form a rope-like structure. Every third amino acid in each polypeptide is a glycine molecule where hydrogen bonding occurs, holding three strands together.
