What is the difference in the bonding between alpha-helix and beta sheets?
A. Hydrogen bonding between the amides only occurs in one of these two types of secondary structures.
B. Hydrogen bonding occurs between the amides of adjacent chains in the sheets instead of between the amides in different parts of the helices.
C. Sulfur bridges allow the spring like turns in alpha helices and van der Waals dispersion allows the folds in beta sheets.
D. Hydrogen bonding always occurs in the alpha helices but only occurs in parallel beta sheets.
B. Hydrogen bonding occurs between the amides of adjacent chains in the sheets instead of between the amides in different parts of the helices.
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The percentage of recombination associated with independent assortment should approximate 50%
Indicate whether the statement is true or false
Genes organized into an operon are beneficial to certain bacteria because the operon allows for
A. differential regulation of individual genes that encode proteins with a common function. B. coordinated regulation of a group of genes that encode proteins with a common function. C. separate regulation of individual genes that encode proteins with different functions. D. coordinated regulation of a group of genes that encode proteins with different functions. E. coordinated regulation of a group of proteins involved in numerous cellular activities.
The newest issue of your favorite science magazine has an article about several recently discovered archaeans. These organisms were found living in swamp mud. Based on this information, these archaeans are probably halophiles.
Answer the following statement true (T) or false (F)
Before 1970, what was the basis for the biological classification system?
A) Three kingdoms: Bacteria, Animalia, and Plantae B) Five kingdoms: Monera, Protista, Fungi, Animalia, and Plantae C) Two kingdoms: Animalia and Plantae D) Two kingdoms: Monera and Animalia E) Two kingdoms: Bacteria and Eukarya