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Bio Chapter 5

Need to Know Pt.2

QuestionAnswer
Are proteins less than or greater than 50% dry mass of cells? Greater than 50%
What protein speeds up chemical reactions? enzymes
What are some functions of proteins? Defense, storage, transport, cellular communication, movement, structural support
Are proteins constructed from the same sets of amino acids or are they random? If same, how many? The same set of 20 amino acids.
Why do amino acids differ in properties? They have different side chains. (R groups)
What is the polymer of an amino acid Polypeptide
What is the range of polypeptide lengths? A few to 1000
The specific activities of proteins are results of...? proteins' 3D architecture
How many polypeptides does a functional protein consist of? 1 or more.
Describe the possible shapes of proteins. They can be twisted, folded, or coiled.
What are the 4 levels of protein structure? Primary, Secondary, Tertiary, and Quaternary
In terms of the dna helix... what shape does an alpha helix form? What shape does a beta pleated sheet form? Coil Fold
What bonds/ interactions does the tertiary level include? Hydrogen bonds, ionic bonds, hydrophobic interactions, and van der Waals interactions
Sickle cell disease could simply be described as...? A change in primary structure.
What can a slight change in the primary structure affect? It can impact the entire protein's structure and its ability to function properly.
What can affect protein structure? Give an example Physical and chemical conditions. Alterations in pH, salt concentration, temperature, or environmental factors
A denatured protein is biologically...? inactive
Created by: akierah.w
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