The compound known as nitrous acid is a reactive chemical that replaces amino groups (NH2) with keto groups (=O). When nitrous acid reacts with the bases in DNA, it can change cytosine to uracil and change adenine to hypoxanthine. A DNA double helix has the following sequence: AACCTACGACC TTGGATGCTGG A. What would be the sequence of this double helix immediately after reaction with the nitrous acid (i.e. before replication)? Let the letter H represent hypoxanthine and U represent uracil. B. Following exposure the nitrous acid was removed, and the DNA was replicated for one generation. What would be the sequence of the DNA products after the DNA sequence resulting from treatment in Part A had replicated once? Your answer should contain the sequences of two double stranded DNA molecules. Note: During DNA replication, uracil hydrogen bonds with adenine, and hypoxanthine hydrogen bonds with cytosine.
DNA and RNA
Deoxyribonucleic acid (DNA) is usually called the blueprint of life. Deoxyribose is a monosaccharide that has a key function in the synthesis of deoxyribonucleic acid. One less oxygen-containing hydroxyl group occurs in deoxyribose sugar. Nucleic acid, deoxyribonucleic acid, is one of the natural components. Deoxyribonucleic acid is a double-stranded molecule. Watson and Crick postulated the double-stranded model of the helix. A deoxyribonucleic acid is a molecular group that carries and transmits genetic information from parents to offspring. All eukaryotic and prokaryotic cells are involved.
DNA as the Genetic Material
DNA, or deoxyribonucleic acid, is a long polymeric nucleic acid molecule discovered in the late 1930s. It is a polymer; a long chain-like molecule made up of several monomers connected in a sequence. It possesses certain characteristics that qualify it as a genetic component. Certain organisms have different types of nucleic acids as their genetic material - DNA or RNA.
Genetics
The significant branch in science which involves the study of genes, gene variations, and the organism's heredity is known as genetics. It is also used to study the involvement of a gene or set of genes in the health of an individual and how it prevents several diseases in a human being. Thus, genetics also creates an understanding of various medical conditions.
DNA Replication
The mechanism by which deoxyribonucleic acid (DNA) is capable of producing an exact copy of its own is defined as DNA replication. The DNA molecules utilize a semiconservative method for replication.
The compound known as nitrous acid is a reactive chemical that replaces amino groups (NH2) with keto groups (=O). When nitrous acid reacts with the bases in DNA, it can change cytosine to uracil and change adenine to hypoxanthine. A DNA double helix has the following sequence:
AACCTACGACC
TTGGATGCTGG
A.
What would be the sequence of this double helix immediately after reaction with the nitrous acid (i.e. before replication)? Let the letter H represent hypoxanthine and U represent uracil.
B.
Following exposure the nitrous acid was removed, and the DNA was replicated for one generation. What would be the sequence of the DNA products after the DNA sequence resulting from treatment in Part A had replicated once? Your answer should contain the sequences of two double stranded DNA molecules. Note: During
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
