Which substance is composed the backbone of DNA?
deoxyribose
What makes up the rungs of the double helix?
A double helix resembles a twisted ladder. Each ‘upright’ pole of the ladder is formed from a backbone of alternating sugar and phosphate groups. Each DNA base? (adenine, cytosine, guanine, thymine) is attached to the backbone and these bases form the rungs.
Which best describes how DNA fits inside a cell nucleus quizlet?
Which best describes how DNA fits inside a cell nucleus? DNA folds into stacked layers called chromatin, which then squeeze into the nucleus. DNA is double-stranded, so one strand is inside the nucleus and the other wraps around the nucleus.
Which best describes how DNA fits inside of a cell nucleus?
DNA folds into stacked layers called chromatin, which then squeeze into the nucleus. DNA is double-stranded, so one strand is inside the nucleus and the other wraps around the nucleus. DNA is naturally much smaller than the cell nucleus so it easily fits inside the nucleus.
How DNA fits inside a cell nucleus?
Chromosomal DNA is packaged inside microscopic nuclei with the help of histones. These are positively-charged proteins that strongly adhere to negatively-charged DNA and form complexes called nucleosomes. Each nuclesome is composed of DNA wound 1.65 times around eight histone proteins.
Which best summarizes the scientific process that led to our current understanding of DNA?
Scientists built on the previous work of other scientists to make new discoveries is the best summarizes the scientific process that led to our current understanding of DNA.
Which best compares DNA and RNA with regard to process of protein production?
Answer. Out of the given statements “RNA leaves the nucleus during the process and DNA remains in the nucleus” compares the DNA and RNA to the best. This makes a single stranded RNA with only the functional information from DNA. Thus formed RNA moves out of nucleus and reaches ribosomes in cytoplasm.
Which substances compose 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.
Which statement is true of DNA?
Answer Expert Verified The true statement regarding DNA is A) contains deoxyribose sugar. DNA (deoxyribonucleic acid) consists of two strands of nucleotides joined by hydrogen bonds. Each nucleotide contains nucleobase (adenine, thymine, cytosine, and guanine), a sugar deoxyribose, and a phosphate group.
What are the subunits of DNA and their function?
Nucleotides are the subunits of DNA. The four nucleotides are adenine, cytosine, guanine and thymine. Each of the four bases has three components, a phosphate group, a deoxyribose sugar and a nitrogen-containing base. These four nucleotides, referred to as the A, C, G and T are the building blocks of DNA.
What are the repeating subunits of DNA?
Each chain is made up of repeating subunits called nucleotides that are held together by chemical bonds. There are four different types of nucleotides in DNA, and they differ from one another by the type of base that is present: adenine (A), thymine (T), guanine (G), and cytosine (C).
Are the subunits making up DNA?
DNA is composed of smaller subunits know as Nucleotides. The three parts of a nucleotide are Sugar, phosphate, and a nitrogen base. The four nitrogen bases that are found in DNA are Adenine, cytosine, guanine, and thymine.
Which is bigger DNA or protein?
DNA contains the genetic information of all living organisms. Proteins are large molecules made up by 20 small molecules called amino acids. This compound is supposed to be the RNA, because it is a simpler molecule compared to DNA and it is easier to synthesize.
How many subunits does DNA have?
four types
What are the base pairing rules for DNA?
The rules of base pairing (or nucleotide pairing) are: A with T: the purine adenine (A) always pairs with the pyrimidine thymine (T) C with G: the pyrimidine cytosine (C) always pairs with the purine guanine (G)
What does a pair with in DNA?
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.
What is the definition of base pairing rules?
Base-pairing rule – the rule stating that in dna, cytosine pairs with guanine and adenine pairs with thymine add in rna, adenine pairs with uracil.
What are the 3 parts that make up the monomers of DNA?
The monomers of DNA are called nucleotides. Nucleotides have three components: a base, a sugar (deoxyribose) and a phosphate residue.
Why is DNA called a double helix?
The double helix of DNA is, like its name implies, in the shape of a helix which is essentially a three dimensional spiral. The double comes from the fact that the helix is made of two long strands of DNA that are intertwined—sort of like a twisted ladder.