The Ultimate DNA Quiz

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Questions and Answers

What is the prime genetic molecule that carries all hereditary information within chromosomes?

Protein
Lipid
DNA (correct)
RNA

What is the most important feature of DNA?

It is composed of four polynucleotide chains twisted around each other in the form of a quadruple helix
It is composed of two polynucleotide chains twisted around each other in the form of a double helix (correct)
It is composed of three polynucleotide chains twisted around each other in the form of a triple helix
It is composed of one polynucleotide chain in a linear form

What is a nucleotide?

A base
A sugar
A fundamental building block of DNA consisting of a phosphate, a sugar, and a base (correct)
A phosphate

What was the primary focus of research on DNA structure during the late 1940s and early 1950s?

How atoms of DNA are linked together (D) Signup and view all the answers

What is a nucleoside?

A sugar and a base (B) Signup and view all the answers

What was the initial fear regarding the structure of DNA?

That it might have very complicated and perhaps bizarre structures that differed radically from one gene to another (D) Signup and view all the answers

What is a phosphodiester linkage?

A linkage between two nucleotides through the 30-hydroxyl of 20-deoxyribose of one nucleotide and the phosphate attached to the 50-hydroxyl of another nucleotide (B) Signup and view all the answers

What is the fundamental structure of DNA?

Double helix (B) Signup and view all the answers

What is the polarity of a DNA chain?

It has a free 50-phosphate or 50-hydroxyl at one end and a free 30-phosphate or 30-hydroxyl at the other end (D) Signup and view all the answers

What is the difference between two genes according to the text?

The order and number of their four nucleotide building blocks along the complementary strands (C) Signup and view all the answers

Which of the following is not a variation in the structure of DNA?

Quadruple helix (C) Signup and view all the answers

What is supercoiling?

The twisting of the double helix around cores of DNA-binding proteins (A) Signup and view all the answers

Which of the following is a factor that influences the precise orientation of base pairs in DNA?

The local DNA sequence (B) Signup and view all the answers

What is the difference between linear and circular DNA molecules?

Linear DNA molecules have two ends, while circular DNA molecules have no ends (A) Signup and view all the answers

What is the reason for the richness and intricacy of the structure of DNA?

The unique physical, chemical, and topological properties of the polynucleotide chain (A) Signup and view all the answers

Which of the following is a variation on the common themes of DNA structure?

The supercoiling of the double helix around cores of DNA-binding proteins (D) Signup and view all the answers

Study Notes

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Description

"Unraveling the Mystery: Test Your Knowledge of DNA Structure and Function" - Take this quiz to explore the fascinating world of genetics and learn about the discovery of DNA as the prime genetic molecule. Test your understanding of DNA structure and its role in carrying hereditary information through chromosomes. Challenge yourself with questions based on the history of DNA research and its significance in modern science. Sharpen your knowledge and impress your friends with your newfound expertise in genetics!