How many base pairs are in one molecule of DNA?

Question

I'm a little confused as to the difference between base pairs and a DNA molecule. Do they mean how many base pairs in one double helix, and is that double helix the DNA molecule? Or are the individual base pairs considered DNA molecules? And how many of these "DNA Molecules" are in one Eukaryotic and Prokatyotic chromosome?

Answer 1

A DNA molecule consists of two polynucleotide chains in the form of a double helix, containing phosphate and the sugar deoxyribose and linked by hydrogen bonds between the complementary bases adenine and thymine or cytosine and guanine.



Therefore a DNA molecule consists out of as many base pairs as it is long.



A chromosome is a single DNA molecule.

Answer 2

There are about 25,000 base pairs in one human DNA molecule (one double-helix), however some animals have DNA that is 2,000,000 base pairs long.

One DNA molecule is made up of two polynucleotide strands that form a double-helix using hydrogen bonds between the nitrogenous bases.

A chromosome is one DNA molecule.

Answer 3

One double helix is the same as one DNA molecule and they both are the same as one chromosome.

So, One double helix molecule = one DNA molecule = one chromosome

But, there can be millions and millions of base pairs in EACH DNA molecule (chromosome). Base pairs are just chemicals that attach themselves to each other, and millions (or sometimes thousands) make up ONE DNA molecule. (Adenine always attaches to Thymine; and Guanine always attaches to Cytosine)

Eukaryotic cells (like humans) have MORE THAN ONE molecule of DNA (chromosome). (Humans have 46 DNA molecules.)

Prokaryotic cells (bacteria, etc) have only ONE molecule molecule of DNA (chromosome)

Answer 4

Antiparallel complementary base pairing. A pairs with T, with 2 hydrogen bonds. C pairs with G, with 3 hydrogen bonds. through the way, this is Watson-Crick base pairing. Chargaff (and Pauling and Franklin and Wilkins and various of alternative others) did no longer arise with it (and those persons probably spent the remainder of their lives facepalming approximately it).

Answer 5

there is no answer to that question, the length of every DNA strand can vary. The alpha helix of DNA is made of of four TYPES of bases. Adenine, Thymine, Cytosine and Guanine. A pairs with T to form two hydrogen bonds. G pairs with C to form 3 hydrogen bonds The alpha helix itself is the DNA. However a chromosome is DNA wrapped around a protein which condenses it which is why chromosomes can be seen with a light microscope.

Answer 6

So a chromosome is a single DNA molecule (a double-helix),

and, they are of different lengths, but each is made up of millions of base-pairs.

Answer 7

Base pairs make up part of a DNA molecule. Each stand of DNA is made of a base, a sugar and a phosphate group. The two stands meet together at the bases to form hydrogen bonds. The double helix is considered the 3 dimensional structure of the DNA molecule. DNA is packaged very tightly into chromosomes, which we can view under a microscope.



The number of base pairs does refer to one in a double helix. If it was single stranded, there would be no base pairs, only bases. The number of base pairs varies between DNA molecules.



I'm pretty sure one long DNA molecule is wrapped and tightly condensed to make up one chromosome.

Answer 8

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