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A double-stranded DNA molecule contains a total of 120 purines and 120 pyrimidines This DNA molecule could be composed of?
I don't really understand the point of the question but let's see what we can do. Purines are Adenine and Guanine Pyrimidines are Tyimine and Cytosine Since A pairs with T and G pairs with C, the molecule can be composed of any number of ACTG where A+G=C+T=120 and A=T and G=C Hope that helps.
What type of bond holds a nucleotide together and connects each nucleotide in a DNA strand?
The backbone of the nucleotides are composed of repeating ribose (in RNA) or deoxyribose (in DNA) and phosphates held together by phosphodiester bonds between the 5's and 3's of the ribose/deoxyribose.
What is the mass number of hydrogen?
The mass number of the most common hydrogen isotope, Hydrogen-1, is one
Atomic number of hydrogen?
The atomic number of hydrogen is 1, which means that a hydrogen atom has one proton in its nucleus.
What are the 5 nitrogen?
The five nitrogenous bases in DNA and RNA are adenine, guanine, thymine, cytosine, and in RNA uracil.
According to chargaffs rules which nucleotide is always paired with adenine in a DNA molecule?
Thymine is always paired with adenine in a DNA molecule according to Chargaff's rules. They form a complementary base pair, with adenine pairing with thymine through two hydrogen bonds.
Are there always going to be an equal number of adenine and thymine nucleotides in a molecule why?
Yes, there will always be an equal number of adenine (A) and thymine (T) nucleotides in a DNA molecule. This is because adenine always pairs with thymine through hydrogen bonding in a double-stranded DNA molecule, following Chargaff's rule.
A sample of DNA contains 500 adenine bases how many thymine bases does it contain?
If a sample of DNA contains 500 adenine bases, it will also contain 500 thymine bases. In DNA, adenine always pairs with thymine through hydrogen bonds, so the number of adenine bases will be equal to the number of thymine bases.
What forensic scientist is trying to find out the number of adenine in the DNA sample that he obtained from a crime scene. What can he assume about the number of adenine?
The forensic scientist can assume that the number of adenine molecules in the DNA sample is equal to the number of thymine molecules, as adenine always pairs with thymine in DNA. This is known as Chargaff's rule. By determining the number of thymine molecules, the scientist can indirectly infer the number of adenine molecules present in the DNA sample.
Are there always going to be equal number of adenine and thymine?
Yes.
How many molecules of adenine and thymine are in each DNA model?
In DNA, adenine always pairs with thymine. Therefore, in each DNA model, the number of adenine molecules will be equal to the number of thymine molecules. The exact count of adenines and thymines will depend on the length of the DNA strand in the model.
Why are there always the same number of adenine and thymine in a molecule?
Chemical analysis has shown that the number of adenine molecules in a sample of DNA is always the same as the number of thymine molecules. A sample of RNA would show that there are equal numbers of adenine molecules and uracil molecules.
Are there always going to be an equal number of adenine and thymine nucleotide in a molecule?
yes.
Are there always going to be an equal number of adenine and thymine nucleotides an a molecule?
yes.
Are there going a equal number of adenine and thymine nucleotides in a molecule?
Yes, please.
Is number of adenine equal to guanine?
Based on the rule of complementary base pairing, the number (percentage) of adenine is equal to the number (percentage) of thymine, and the number (percentage) of cytosine is equal to the number (percentage) of guanine.
What base pair is harder to separate?
Cytosine and Guanine require more energy to separate than Adenine and Thymine. This is because C and G bond with 3 hydrogen bonds while A and T bond with only 2 hydrogen bonds. Since there are more hydrogen bonds between C and G, a higher amount of energy is required to overcome these hydrogen bonds to separate the base pairs.
