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Basic Molecule of Cell

In: Science

Submitted By wong1998
Words 4247
Pages 17
Topic 1 Basic Molecules of Cells
Chapter 3 The Molecules of Cells

PowerPoint Lectures for

Campbell Biology: Concepts & Connections, Seventh Edition
Reece, Taylor, Simon, and Dickey
© 2012 Pearson Education, Inc.

Lecture by Edward J. Zalisko

Learning outcomes:
1. Explain how a cell can make a variety of large molecules from a small set of molecules
2. Define monosaccharides, disaccharides, and polysaccharides and explain their functions
3. Define lipids, phospholipids, and steroids and explain their functions
4. Describe the chemical structure of proteins and their importance to cells
5. Describe the chemical structure of nucleic acids and how they relate to inheritance
Copyright © 2012 Pearson Education, Inc.

Rearrange these in the correct order:


© 2012 Pearson Education, Inc.

3.1 Life’s molecular diversity is based on the properties of carbon
 Carbon-based molecules are called organic compounds.  Methane (CH4) is one of the simplest organic compounds. – Four covalent bonds link four hydrogen atoms to the carbon atom.
– Each of the four lines in the formula for methane represents a pair of shared electrons.
© 2012 Pearson Education, Inc.

Three representatives of methane (CH4)

Structural formula Ball-and-stick model Space-filling model The four single bonds of carbon point to the corners of a tetrahedron.

Different bond angles and shapes occur when carbon atoms form double bonds. Hence, a molecule’s shape determines its function 3.1 Life’s molecular diversity is based on the properties of carbon
 Compound composed of only carbon and hydrogen are called hydrocarbons.  Carbon, with attached hydrogens (aka carbon skeleton), can bond together in chains of
(i) Various lengths
(ii) Branched or unbranched
(iii) Presence of double bonds (number &...

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