Life on Earth: At a Glance

Life on Earth
Audesirk & Audesirk
Prentice-Hall, Inc.

The Relationship between Genes and Proteins: Most genes encode the information for the synthesis of a protein.
The sequence of bases in DNA codes for the sequence of amino acids in proteins.

Synthesizing Proteins from the Instructions in DNA
Genetic information flows in a cell from DNA to RNA to protein.

The Genetic Code
The genetic code uses three bases to specify each amino acid.

RNA: Intermediary in Protein Synthesis
Transcription produces RNA molecules that are complementary copies of one strand of DNA.
Three types of RNA cooperate in protein synthesis.

Protein Synthesis

Mutations in DNA and Their Effects
Point mutations are changes in a single base.
Insertion and deletion mutations result from addition or removal of nucleotides.
Mutations differ in their effects on protein structure and function.
Mutations provide the raw material for evolution.

Gene Regulation
Gene regulation in prokaryotes.
Gene regulation in eukaryotes.
Eukaryotic genes consist of DNA segments that code for the amino acid sequence of proteins interrupted by noncoding DNA segments.
Eukaryotic cells may regulate the transcription of individual genes, large parts of chromosomes, or entire chromosomes.; The sequence of bases in DNA codes for the sequence of amino acids in proteins.

Synthesizing Proteins from the Instructions in DNA
Genetic information flows in a cell from DNA to RNA to protein.

The Genetic Code
The genetic code uses three bases to specify each amino acid.

RNA: Intermediary in Protein Synthesis
Transcription produces RNA molecules that are complementary copies of one strand of DNA.
Three types of RNA cooperate in protein synthesis.

Protein Synthesis

Mutations in DNA and Their Effects
Point mutations are changes in a single base.
Insertion and deletion mutations result from addition or removal of nucleotides.
Mutations differ in their effects on protein structure and function.
Mutations provide the raw material for evolution.

Gene Regulation
Gene regulation in prokaryotes.
Gene regulation in eukaryotes.
Eukaryotic genes consist of DNA segments that code for the amino acid sequence of proteins interrupted by noncoding DNA segments.
Eukaryotic cells may regulate the transcription of individual genes, large parts of chromosomes, or entire chromosomes.
Synthesizing Proteins from the Instructions in DNA: Genetic information flows in a cell from DNA to RNA to protein.

The Genetic Code
The genetic code uses three bases to specify each amino acid.

RNA: Intermediary in Protein Synthesis
Transcription produces RNA molecules that are complementary copies of one strand of DNA.
Three types of RNA cooperate in protein synthesis.

Protein Synthesis

Mutations in DNA and Their Effects
Point mutations are changes in a single base.
Insertion and deletion mutations result from addition or removal of nucleotides.
Mutations differ in their effects on protein structure and function.
Mutations provide the raw material for evolution.

Gene Regulation
Gene regulation in prokaryotes.
Gene regulation in eukaryotes.
Eukaryotic genes consist of DNA segments that code for the amino acid sequence of proteins interrupted by noncoding DNA segments.
Eukaryotic cells may regulate the transcription of individual genes, large parts of chromosomes, or entire chromosomes.
The Genetic Code: The genetic code uses three bases to specify each amino acid.

RNA: Intermediary in Protein Synthesis
Transcription produces RNA molecules that are complementary copies of one strand of DNA.
Three types of RNA cooperate in protein synthesis.

Protein Synthesis

Mutations in DNA and Their Effects
Point mutations are changes in a single base.
Insertion and deletion mutations result from addition or removal of nucleotides.
Mutations differ in their effects on protein structure and function.
Mutations provide the raw material for evolution.

Gene Regulation
Gene regulation in prokaryotes.
Gene regulation in eukaryotes.
Eukaryotic genes consist of DNA segments that code for the amino acid sequence of proteins interrupted by noncoding DNA segments.
Eukaryotic cells may regulate the transcription of individual genes, large parts of chromosomes, or entire chromosomes.
RNA: Intermediary in Protein Synthesis: Transcription produces RNA molecules that are complementary copies of one strand of DNA.
Three types of RNA cooperate in protein synthesis.

Protein Synthesis

Mutations in DNA and Their Effects
Point mutations are changes in a single base.
Insertion and deletion mutations result from addition or removal of nucleotides.
Mutations differ in their effects on protein structure and function.
Mutations provide the raw material for evolution.

Gene Regulation
Gene regulation in prokaryotes.
Gene regulation in eukaryotes.
Eukaryotic genes consist of DNA segments that code for the amino acid sequence of proteins interrupted by noncoding DNA segments.
Eukaryotic cells may regulate the transcription of individual genes, large parts of chromosomes, or entire chromosomes.; Three types of RNA cooperate in protein synthesis.

Protein Synthesis

Mutations in DNA and Their Effects
Point mutations are changes in a single base.
Insertion and deletion mutations result from addition or removal of nucleotides.
Mutations differ in their effects on protein structure and function.
Mutations provide the raw material for evolution.

Gene Regulation
Gene regulation in prokaryotes.
Gene regulation in eukaryotes.
Eukaryotic genes consist of DNA segments that code for the amino acid sequence of proteins interrupted by noncoding DNA segments.
Eukaryotic cells may regulate the transcription of individual genes, large parts of chromosomes, or entire chromosomes.
Protein Synthesis
Mutations in DNA and Their Effects: Point mutations are changes in a single base.
Insertion and deletion mutations result from addition or removal of nucleotides.
Mutations differ in their effects on protein structure and function.
Mutations provide the raw material for evolution.

Gene Regulation
Gene regulation in prokaryotes.
Gene regulation in eukaryotes.
Eukaryotic genes consist of DNA segments that code for the amino acid sequence of proteins interrupted by noncoding DNA segments.
Eukaryotic cells may regulate the transcription of individual genes, large parts of chromosomes, or entire chromosomes.; Insertion and deletion mutations result from addition or removal of nucleotides.
Mutations differ in their effects on protein structure and function.
Mutations provide the raw material for evolution.

Gene Regulation
Gene regulation in prokaryotes.
Gene regulation in eukaryotes.
Eukaryotic genes consist of DNA segments that code for the amino acid sequence of proteins interrupted by noncoding DNA segments.
Eukaryotic cells may regulate the transcription of individual genes, large parts of chromosomes, or entire chromosomes.; Mutations differ in their effects on protein structure and function.
Mutations provide the raw material for evolution.

Gene Regulation
Gene regulation in prokaryotes.
Gene regulation in eukaryotes.
Eukaryotic genes consist of DNA segments that code for the amino acid sequence of proteins interrupted by noncoding DNA segments.
Eukaryotic cells may regulate the transcription of individual genes, large parts of chromosomes, or entire chromosomes.; Mutations provide the raw material for evolution.

Gene Regulation
Gene regulation in prokaryotes.
Gene regulation in eukaryotes.
Eukaryotic genes consist of DNA segments that code for the amino acid sequence of proteins interrupted by noncoding DNA segments.
Eukaryotic cells may regulate the transcription of individual genes, large parts of chromosomes, or entire chromosomes.
Gene Regulation: Gene regulation in prokaryotes.
Gene regulation in eukaryotes.
Eukaryotic genes consist of DNA segments that code for the amino acid sequence of proteins interrupted by noncoding DNA segments.
Eukaryotic cells may regulate the transcription of individual genes, large parts of chromosomes, or entire chromosomes.; Gene regulation in eukaryotes.
Eukaryotic genes consist of DNA segments that code for the amino acid sequence of proteins interrupted by noncoding DNA segments.
Eukaryotic cells may regulate the transcription of individual genes, large parts of chromosomes, or entire chromosomes.; Eukaryotic genes consist of DNA segments that code for the amino acid sequence of proteins interrupted by noncoding DNA segments.
Eukaryotic cells may regulate the transcription of individual genes, large parts of chromosomes, or entire chromosomes.; Eukaryotic cells may regulate the transcription of individual genes, large parts of chromosomes, or entire chromosomes.

Designed in cooperation with Andrew Stull and Steven Brunasso.

Last Update - July 25, 1997