The ecological diversity of phototrophic bacteria is illustrated by the different ________ that allow them to perform photosynthesis in low light environments such as deep in the ocean, in various sediments, and in thick layered mats
A) nitrogen fixation strategies
B) bacteriochlorophyll and photosystems
C) specialized stalked cells
D) endospores and resistant cell types
Answer: B
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The diagram below shows part of a transmembrane protein. The yellow coloured L subunit has a disordered loop within the hydrophobic core of the lipid membrane. Does this then invalidate the general rule that transmembrane proteins span the lipid bilayer as alpha helices or beta sheets? Explain.
What will be an ideal response?
Urease is an important virulence factor of which of the following?
A) Porphyromonas gingivalis B) Vibrio cholerae C) Escherichia coli O157:H7 D) Helicobacter pylori E) Shigella dysenteriae
_____ is the specific set of genes an organism possesses, while _______ is the physical trait.
a) Karyotype; wildtype b) Phenotype; karyotype c) Genotype; karyotype d) Genotype; phenotype
The regulator gene codes for the DNA-binding proteins that act as repressors.
Answer the following statement true (T) or false (F)