5-Bromouracil causes mutations in DNA. Reason for this should be determined. Concept introduction: A parent DNA molecule consists of two poly nucleotide chains held together by bonds between complementary nitrogen bases. A base is nitrogen containing heterocyclic compound which is found in DNA and RNA. There are mainly five nitrogen bases. (1) Adenine (2) Guanine (3) Cytosine (4) Thymine (5) Uracil In DNA Adenine always makes a double bond with Thymine ( A = T ) and cytosine always makes triple bond with guanine ( G ≡ C ) Enol is a tautomer which exhibiting a special type of functional isomerism namely tautomerism. Tautomerism is a special type of functional isomerism in which isomers are in dynamic equilibrium with each other. Mutation is the process that results in change in the sequence of the DNA, and the compound which causes mutation is known as mutagenic compound.

Question

A complete tensile test was performed on a magnesium specimen of 12 mm diameter and 30 mm length, until breaking. The specimen is assumed to maintain a constant volume. Calculate the approximate value of the actual stress at breaking. TABLE. The tensile force F and the length of the specimen are represented for each L until breaking. F/N L/mm 0 30,0000 30,0296 5000 10000 30,0592 15000 30,0888 20000 30,15 25000 30,51 26500 30,90 27000 31,50 26500 32,10 25000 32,79

Answer 1

Question

Chapter 26, Problem 36P

Interpretation Introduction

Interpretation:

5-Bromouracil causes mutations in DNA. Reason for this should be determined.

Concept introduction:

A parent DNA molecule consists of two poly nucleotide chains held together by bonds between complementary nitrogen bases.

A base is nitrogen containing heterocyclic compound which is found in DNA and RNA.

There are mainly five nitrogen bases.

(1) Adenine

(2) Guanine

(3) Cytosine

(4) Thymine

(5) Uracil

In DNA Adenine always makes a double bond with Thymine (A=T) and cytosine always makes triple bond with guanine (G≡C)

Enol is a tautomer which exhibiting a special type of functional isomerism namely tautomerism.

Tautomerism is a special type of functional isomerism in which isomers are in dynamic equilibrium with each other.

Mutation is the process that results in change in the sequence of the DNA, and the compound which causes mutation is known as mutagenic compound.

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