Warm-Up (3/28) Name Date Period Describe the relationship between DNA and RNA in the synthesis of proteins. Use the following words in your explanation: transcription, translation, nucleus, ribosome.

3D.1a: Communication involves transduction of stimulatory or inhibitory signals from other cells, organisms or the environment. 3D.1b: Correct and appropriate signal transduction processes are generally under strong selective pressure. 1B.1a: Structural and functional evidence supports the relatedness of all domains. 1B.1a.1: DNA and RNA are carriers of genetic information through transcription, translation, and replication. 1B.1a.2: Major features of the genetic code are shared by all modern living systems. 1B.1a.3: Metabolic pathways are conserved across all currently recognized domains. 1B.1b: Structural evidence supports the relatedness of all eukaryotes. Illustrative example: membrane-bound organelles (mitochondria and/or chloroplasts)

Unity of Life The structure and components of DNA are conserved (shared) across all lifeforms.

Unity of Life The structure and components of DNA are conserved (shared) across all lifeforms. The same is true of RNA.

Unity of Life amino acid sequence The structure and components of DNA are conserved (shared) across all lifeforms. The same is true of RNA. The same is true of proteins.

The same is true of the genetic code. Unity of Life The same is true of the genetic code.

Unity of Life The same is true of metabolic pathways... “Glycolysis”

Unity of Life The same is true of metabolic pathways... “ATP Synthesis” The same is true of metabolic pathways...

...and of cell structures… Unity of Life The same is true of metabolic pathways... ...and of cell structures…

...and of cell structures… Unity of Life The same is true of metabolic pathways... ...and of cell structures… …and of signal transduction pathways.

The unity of life suggests the relatedness of life. Bacteria Archaebacteria Eubacteria The 3 Domains of Life

The unity of life suggests the relatedness of life. Bacteria Archaebacteria Eubacteria mitochondria and nuclei The 3 Domains of Life

Critical Thinking Question #1 Justify the claim that all living organisms share a common ancestor by describing the essential properties of all cells. (LO 1.16)

Critical Thinking Question #2 Eukaryotes, comprising all plants, animals, fungi, and uni- and multi-cellular organisms referred to as protists, are the only organisms with membrane-bound compartments inside their cells (such as lysosomes, mitochondria, or nuclei). Describe how the presence of membrane- bound compartments in all eukaryotes suggests their relatedness to one-another. (LO 1.15)

Closure On the piece of white paper from the back, answer the following question: Name Date Period Describe the basic features which all cells must possess in order to engage in signal transduction. Scale 1 – 10