Question 1

Which of the following facts did Hershey and Chase make use of in trying to determine whether DNA or protein is the genetic material?

Accepted Answer

A)  DNA contains sulfur, whereas protein does not. 
B)  DNA contains phosphorus, whereas protein does not. 
C)  DNA contains nitrogen, whereas protein does not. 
D)  DNA contains purines, whereas protein includes pyrimidines. 
A)  DNA contains sulfur, whereas protein does not. 
B)  DNA contains phosphorus, whereas protein does not. 
C)  DNA contains nitrogen, whereas protein does not. 
D)  DNA contains purines, whereas protein includes pyrimidines.

Question 2

Which of the following characteristics of eukaryotic telomeres cause them to replicate differently than the rest of the chromosome?

Accepted Answer

A)  the activity of telomerase enzyme 
B)  DNA polymerase that cannot replicate the leading strand template to its 5' end 
C)  gaps left at the 5' end of the lagging strand template 
D)  gaps left at the 3' end of the lagging strand because of the need for a primer 
A)  the activity of telomerase enzyme 
B)  DNA polymerase that cannot replicate the leading strand template to its 5' end 
C)  gaps left at the 5' end of the lagging strand template 
D)  gaps left at the 3' end of the lagging strand because of the need for a primer

Question 3

Which of the following types of molecules help to hold the DNA strands apart while they are being replicated?

Accepted Answer

A)  primase 
B)  ligase 
C)  DNA polymerase 
D)  single-strand DNA binding proteins 
A)  primase 
B)  ligase 
C)  DNA polymerase 
D)  single-strand DNA binding proteins

Question 4

In E. coli, there is a mutation in a gene called dnaB that alters the helicase that normally acts at the origin of replication. Which of the following events would you expect to occur as a result of this mutation?

Accepted Answer

A)  Additional proofreading will occur. 
B)  No replication fork will be formed. 
C)  Replication will occur via RNA polymerase alone. 
D)  Replication will require a DNA template from another source. 
A)  Additional proofreading will occur. 
B)  No replication fork will be formed. 
C)  Replication will occur via RNA polymerase alone. 
D)  Replication will require a DNA template from another source.

Question 5

Why does a new DNA strand elongate only in the 5' to 3' direction during DNA replication?

Accepted Answer

A)  DNA polymerase begins adding nucleotides at the 5' end of the template. 
B)  The polarity of the DNA molecule prevents addition of nucleotides at the 3' end. 
C)  Replication must progress toward the replication fork. 
D)  DNA polymerase can add nucleotides only to the free 3' end. 
A)  DNA polymerase begins adding nucleotides at the 5' end of the template. 
B)  The polarity of the DNA molecule prevents addition of nucleotides at the 3' end. 
C)  Replication must progress toward the replication fork. 
D)  DNA polymerase can add nucleotides only to the free 3' end.

Exam 16: The Molecular Basis of Inheritance

Which of the following facts did Hershey and Chase make use of in trying to determine whether DNA or protein is the genetic material?

Which of the following characteristics of eukaryotic telomeres cause them to replicate differently than the rest of the chromosome?

Which of the following types of molecules help to hold the DNA strands apart while they are being replicated?

In E. coli, there is a mutation in a gene called dnaB that alters the helicase that normally acts at the origin of replication. Which of the following events would you expect to occur as a result of this mutation?

Why does a new DNA strand elongate only in the 5' to 3' direction during DNA replication?

Evolution, the Themes of Biology, and Scientific Inquiry

The Chemical Context of Life

Water and Life

Carbon and the Molecular Diversity of Life

The Structure and Function of Large Biological Molecules

A Tour of the Cell

Membrane Structure and Function

An Introduction to Metabolism

Cellular Respiration and Fermentation

Photosynthesis

Cell Communication

The Cell Cycle

Meiosis and Sexual Life Cycles

Mendel and the Gene Idea

The Chromosomal Basis of Inheritance

Gene Expression: From Gene to Protein

Regulation of Gene Expression

Viruses

DNA Tools and Biotechnology

Genomes and Their Evolution

Descent with Modification: A Darwinian View of Life

The Evolution of Populations

The Origin of Species

The History of Life on Earth

Phylogeny and the Tree of Life

Bacteria and Archaea

Protists

Plant Diversity I: How Plants Colonized Land

Plant Diversity II: The Evolution of Seed Plants

Fungi

An Overview of Animal Diversity

An Introduction to Invertebrates

The Origin and Evolution of Vertebrates

Vascular Plant Structure, Growth, and Development

Resource Acquisition and Transport in Vascular Plants

Soil and Plant Nutrition

Angiosperm Reproduction and Biotechnology

Plant Responses to Internal and External Signals

Basic Principles of Animal Form and Function

Animal Nutrition

Circulation and Gas Exchange

The Immune System

Osmoregulation and Excretion

Hormones and the Endocrine System

Animal Reproduction

Animal Development

Neurons, Synapses, and Signaling

Nervous Systems

Sensory and Motor Mechanisms

Animal Behavior

An Introduction to Ecology and the Biosphere

Population Ecology

Community Ecology

Ecosystems and Restoration Ecology

Conservation Biology and Global Change

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