Chapter 7: DNA Structure and Replication Quiz

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What type of bond is present between adenine (A) and thymine (T) in DNA base pairing?

Covalent bond

Double bond (correct)

Single bond

Triple bond

How many hydrogen bonds are there between guanine (G) and cytosine (C) in DNA base pairing?

Three hydrogen bonds (correct)

Two hydrogen bonds

One hydrogen bond

Four hydrogen bonds

What does the direction '5'-3'' refer to in DNA strands?

The number of hydrogen bonds in the DNA structure

The position of the nitrogenous bases

The sugar-phosphate backbone orientation (correct)

The orientation of the helix

Which scientist/s proposed that DNA has a double helix structure?

Watson and Crick Signup and view all the answers

Rosalind Franklin's contribution to DNA involved:

X-ray diffraction data Signup and view all the answers

What was the significance of Chargaff's rules of base composition?

Establishing complementary base pairing Signup and view all the answers

In the Avery, MacLeod, and McCarty Experiment, what did they demonstrate about DNA?

DNA transformation in bacteria Signup and view all the answers

What was the outcome of Hershey-Chase Experiment?

'Transforming principle' was DNA Signup and view all the answers

'Base pairing' in DNA refers to the bonding between:

'Nitrogenous bases' of complementary strands Signup and view all the answers

'Antiparallel' arrangement in DNA means that:

'Both backbones have opposite orientations' Signup and view all the answers

What is the primary force responsible for base pairing in DNA?

Hydrogen bonds Signup and view all the answers

Which of the following statements about the DNA structure is incorrect?

The base pairs are arranged in a parallel manner. Signup and view all the answers

What is the significance of Griffith's Transformation Experiment in the context of DNA?

It demonstrated the transfer of genetic material between bacterial cells. Signup and view all the answers

Which of the following statements correctly describes the base pairing in DNA?

Adenine (A) pairs with Thymine (T), and Guanine (G) pairs with Cytosine (C). Signup and view all the answers

What is the significance of the '5'-3'' direction in DNA strands?

It denotes the direction of the sugar-phosphate backbone. Signup and view all the answers

Which scientist's contribution was pivotal in determining the double-helix structure of DNA?

James Watson and Francis Crick Signup and view all the answers

What was the significance of Chargaff's rules of base composition in the context of DNA structure?

It revealed that the bases in DNA are present in specific ratios. Signup and view all the answers

Which of the following statements about the Hershey-Chase Experiment is correct?

It provided evidence that DNA is the genetic material. Signup and view all the answers

What was the significance of the Avery, MacLeod, and McCarty Experiment in the context of DNA?

It demonstrated that DNA is the genetic material. Signup and view all the answers

What was Rosalind Franklin's contribution to the discovery of the DNA structure?

She provided X-ray diffraction data that revealed the helical structure of DNA. Signup and view all the answers

What did Frederick Griffith's transformation experiment with Streptococcus pneumoniae demonstrate?

Transformation of avirulent strains to virulent strains Signup and view all the answers

Which geneticists favored proteins as the genetic material in the 1940s?

Hershey and Chase Signup and view all the answers

What did Hershey and Chase's experiment using radioisotopes demonstrate?

DNA directs viral reproduction Signup and view all the answers

What do nucleotides consist of in terms of their components?

Phosphate group and pentose sugar Signup and view all the answers

Which type of bond links nucleotides in DNA during synthesis?

Covalent bonds Signup and view all the answers

What did Erwin Chargaff's rules of base composition establish in the field of genetics?

The ratio of pyrimidines to purines in DNA Signup and view all the answers

Which molecule must exhibit the ability to replicate, store information, express information, and allow variation by mutation to serve as genetic material?

DNA Signup and view all the answers

What characteristics must the genetic material exhibit according to the text?

Replication, storage of information, expression of information, mutation capability Signup and view all the answers

In 1903, Walter Sutton and Theodor Boveri described parallels between chromosome partitioning into gametes and the inheritance of genes. What does this indicate?

Genes are located on chromosomes Signup and view all the answers

Why was DNA made a candidate for the hereditary material in 1923?

Due to its localization to chromosomes and characteristics like replication and storage of information Signup and view all the answers

Why were proteins and RNA also considered to be candidates for the hereditary material?

Due to their presence in chromosomes Signup and view all the answers

What was the significance of Mendel's hereditary principles being rediscovered in 1900 according to the text?

It showed the inheritance of traits from parents Signup and view all the answers

What was the key finding from Rosalind Franklin's X-ray diffraction analysis of DNA?

DNA has a double helix structure with a periodicity of 3.4 Angstroms Signup and view all the answers

According to the Watson and Crick model, what is the arrangement of the two DNA strands?

Anti-parallel strands connected by base pairing Signup and view all the answers

What is the significance of the '5'-3'' direction in DNA strands?

It represents the polarity of the sugar-phosphate backbone Signup and view all the answers

Based on Chargaff's rules, what can be inferred about the base composition of DNA?

The amount of adenine (A) equals the amount of guanine (G), and the amount of thymine (T) equals the amount of cytosine (C) Signup and view all the answers

Which of the following statements accurately describes the base pairing in DNA?

Adenine (A) pairs with thymine (T) via two hydrogen bonds, and guanine (G) pairs with cytosine (C) via three hydrogen bonds Signup and view all the answers

What was the significance of the Hershey-Chase Experiment in relation to DNA?

It demonstrated that DNA is the genetic material that carries hereditary information Signup and view all the answers

In the DNA structure, what is the significance of the antiparallel arrangement of the two backbones?

It allows for the formation of hydrogen bonds between complementary base pairs Signup and view all the answers

What was the significance of Erwin Chargaff's rules of base composition in the context of DNA structure?

They showed that the ratio of adenine to thymine and guanine to cytosine is always equal in DNA Signup and view all the answers

Which of the following statements accurately describes the chemical affinity responsible for base pairing in DNA?

Hydrogen bonds form between complementary base pairs Signup and view all the answers

In the context of DNA structure, what is the significance of the '5'-3'' direction of the strands?

It determines the direction of DNA replication and transcription Signup and view all the answers

Which of the following experiments or observations was not directly involved in the discovery of the DNA double helix structure?

Meselson-Stahl Experiment Signup and view all the answers

Which of the following statements accurately describes the significance of the Hershey-Chase Experiment in the context of DNA structure?

It provided direct evidence that DNA is the genetic material Signup and view all the answers

Which of the following statements accurately describes the significance of the Avery, MacLeod, and McCarty Experiment in the context of DNA structure?

It provided evidence that DNA is the genetic material Signup and view all the answers

Chapter 7: DNA Structure and Replication Quiz

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Questions and Answers

What type of bond is present between adenine (A) and thymine (T) in DNA base pairing?

How many hydrogen bonds are there between guanine (G) and cytosine (C) in DNA base pairing?

What does the direction '5'-3'' refer to in DNA strands?

Which scientist/s proposed that DNA has a double helix structure?

Rosalind Franklin's contribution to DNA involved:

What was the significance of Chargaff's rules of base composition?

In the Avery, MacLeod, and McCarty Experiment, what did they demonstrate about DNA?

What was the outcome of Hershey-Chase Experiment?

'Base pairing' in DNA refers to the bonding between:

'Antiparallel' arrangement in DNA means that:

What is the primary force responsible for base pairing in DNA?

Which of the following statements about the DNA structure is incorrect?

What is the significance of Griffith's Transformation Experiment in the context of DNA?

Which of the following statements correctly describes the base pairing in DNA?

What is the significance of the '5'-3'' direction in DNA strands?

Which scientist's contribution was pivotal in determining the double-helix structure of DNA?

What was the significance of Chargaff's rules of base composition in the context of DNA structure?

Which of the following statements about the Hershey-Chase Experiment is correct?

What was the significance of the Avery, MacLeod, and McCarty Experiment in the context of DNA?

What was Rosalind Franklin's contribution to the discovery of the DNA structure?

What did Frederick Griffith's transformation experiment with Streptococcus pneumoniae demonstrate?

Which geneticists favored proteins as the genetic material in the 1940s?

What did Hershey and Chase's experiment using radioisotopes demonstrate?

What do nucleotides consist of in terms of their components?

Which type of bond links nucleotides in DNA during synthesis?

What did Erwin Chargaff's rules of base composition establish in the field of genetics?

Which molecule must exhibit the ability to replicate, store information, express information, and allow variation by mutation to serve as genetic material?

What characteristics must the genetic material exhibit according to the text?

In 1903, Walter Sutton and Theodor Boveri described parallels between chromosome partitioning into gametes and the inheritance of genes. What does this indicate?

Why was DNA made a candidate for the hereditary material in 1923?

Why were proteins and RNA also considered to be candidates for the hereditary material?

What was the significance of Mendel's hereditary principles being rediscovered in 1900 according to the text?

What was the key finding from Rosalind Franklin's X-ray diffraction analysis of DNA?

According to the Watson and Crick model, what is the arrangement of the two DNA strands?

What is the significance of the '5'-3'' direction in DNA strands?

Based on Chargaff's rules, what can be inferred about the base composition of DNA?

Which of the following statements accurately describes the base pairing in DNA?

What was the significance of the Hershey-Chase Experiment in relation to DNA?

In the DNA structure, what is the significance of the antiparallel arrangement of the two backbones?

What was the significance of Erwin Chargaff's rules of base composition in the context of DNA structure?

Which of the following statements accurately describes the chemical affinity responsible for base pairing in DNA?

In the context of DNA structure, what is the significance of the '5'-3'' direction of the strands?

Which of the following experiments or observations was not directly involved in the discovery of the DNA double helix structure?

Which of the following statements accurately describes the significance of the Hershey-Chase Experiment in the context of DNA structure?

Which of the following statements accurately describes the significance of the Avery, MacLeod, and McCarty Experiment in the context of DNA structure?

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