Molecular & Cellular Biology

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Photo depicts Earth from space.
This NASA image is a composite of several satellite-based views of Earth. To make the whole-Earth image, NASA scientists combine observations of different parts of the planet. (credit: NASA/GSFC/NOAA/USGS)

Viewed from space, Earth offers no clues about the diversity of life forms that reside there. The first forms of life on Earth are thought to have been microorganisms that existed for billions of years in the ocean before plants and animals appeared. The mammals, birds, and flowers so familiar to us are all relatively recent, originating 130 to 200 million years ago. Humans have inhabited this planet for only the last 2.5 million years, and only in the last 200,000 years have humans started looking like we do today.

This introductory course in biology starts at the microscopic level, with molecules and cells. Before we get into the specifics of cell structure and behavior, however, lets take a cursory glance at the field of biology more generally. Though biology as we know it today is a relatively new field, we have been studying living things since the beginning of recorded history. The invention of the microscope was the turning point in the history of biology; it paved the way for scientists to discover bacteria and other tiny organisms and ultimately led to the modern cell theory of biology. You will notice that, unlike the core program courses you took in chemistry and physics, introductory biology does not have many mathematical laws and rules and does not require much math. Instead, you will learn a great number of new terms and concepts that will help you describe life at the smallest level. Over the course of this semester, you will recognize the ways in which the tiniest of molecules are involved in the way we go about our everyday lives. Note that this course is an alternative to BIO101B, and that you may choose to take either BIO101A or BIO101B in order to learn about molecular and cellular biology. These courses cover the same material but in a slightly different way.

Quiz PDF eBook: 
Molecular & Cellular Biology
Download Molecular Biology Quiz PDF eBook
28 Pages
2014
English US
Educational Materials



Source:  Liang Wang, Johanna Choo, Ann Schlosser and Katie George. Introduction to Molecular and Cellular Biology. (The Saylor Academy 2014), http://www.saylor.org/courses/bio101a/ (Accessed 16 May, 2014). License: Creative Commons BY-NC-ND
Keyaira Braxton
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