What functions do proteins perform?
a. as catalysts in chemical reactions
b. in gene regulation
c. in structural and mechanical support
d. all of the above
d
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Which of the following can directly participate in creating the binding specificity of an enzyme active site? Choose all that apply
A. hydrophobic amino acid side chains B. hydrophilic amino acid side chains C. alpha helical regions of the polypeptide D. beta-sheet regions of the polypeptide E. negatively charged amino acid side chains F. positively charged amino acid side chains
All of the following are dependent on cilia EXCEPT the
A) gills of oysters. B) respiratory tract of vertebrates. C) oviduct in mammals. D) sperm of animals.
Treating a plant with a fungicide could interfere with the plant's uptake of nitrogen.
Answer the following statement true (T) or false (F)
Building block molecules for biosynthetic pathways come from the cell's catabolic pathways and from the environment.
Answer the following statement true (T) or false (F)