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Assume that a section of double-stranded DNA contains 100 base pairs If 40 of the pairs contain base c how many pairs would contain base a?
If there are 40 pairs containing base C, the remaining pairs must contain the complementary base, G. Since each base pair must contain one A and one T (complementary to each other), the number of pairs containing base A would be the same as the number containing base T. Therefore, there would be 60 pairs containing base A.
How are base pairs held together in DNA molecules?
Base pairs in DNA molecules are held together by hydrogen bonds between the nitrogenous 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.
What two types of molecules are involved when the codon pairs with its anticodon?
The two types of molecules involved when the codon pairs with its anticodon are messenger RNA (mRNA) and transfer RNA (tRNA). The mRNA carries the codon sequence, while the tRNA carries the anticodon sequence that base-pairs with the codon during translation.
What is an organisms diploid number?
An organism's diploid number refers to the total number of chromosomes in a diploid cell, which is a cell containing two sets of chromosomes. In humans, the diploid number is 46, with 23 pairs of chromosomes.
Assume that a section of double-stranded DNA contains 100 base pairs If 40 of the pairs contain base c how many pairs would contain base a?
If there are 40 pairs containing base C, the remaining pairs must contain the complementary base, G. Since each base pair must contain one A and one T (complementary to each other), the number of pairs containing base A would be the same as the number containing base T. Therefore, there would be 60 pairs containing base A.
Do polar molecules have lone pairs?
Yes, polar molecules can have lone pairs of electrons.
How are base pairs held together in DNA molecules?
Base pairs in DNA molecules are held together by hydrogen bonds between the nitrogenous 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.
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.
What do atoms form when they share electric pairs?
molecules
How are the shapes of molecules of polyatomic ions related to the number of electron pairs surrounding the central atom?
VSEPR theory predicts that the electron pairs in bonds and lone pairs repel one another and this gives rise to the shape. Lone pairs repel bonding pairs more than bonding pairs repel one another. It is often taught that electrostatic repulsion is the major cause of this but the man who invented the theory, Prof. Gillespie, says that the repulsion is due to the Pauli Exclusion Principle. See wikipedia link for a reasonable description.
Do lone pairs affect the shape of diatomic molecules?
No, lone pairs do not affect the shape of diatomic molecules because diatomic molecules consist of only two atoms which form a straight line by default. Lone pairs only exist in molecules with more than two atoms and they can affect the shape by influencing the bond angles.
Why do you think some molecules have linear molecular structure while others have bent molecular structures?
because having of different number of lone pairs
How many complete DNA molecules after three rounds of replication?
Each time a cell divides it's 23 PAIRS of chromosomes are divided and then 23 go to each of 2 new cells. Then each new cell with 23 chromosomes then replicates it's chromosomes so it has 23 PAIRs. Just look at a diagram of cell "mitosis". After the first mitosis: 46 pairs and 2 cells, Second round: 4 cells containing 92 PAIRS of DNA total. 3RD ROUND: Eights cells each containing 23 PAIRS of chromosomes: 8 x 23= 184 total chromosomes.
What factors affect the shape of the molecule?
The factors affecting the shape of the molecules are the bonded e and the lone pairs of electrons
Pairs of atoms that share equal number of electrons?
Atoms that share an equal number of electrons form covalent bonds. In these covalent bonds, each atom contributes the same number of electrons to the shared pair. This equal sharing of electrons results in stable molecules.
