Detail the mechanism by which halophilic Archaea obtain energy from light
What will be an ideal response?
Answer: Halobacteria have the ability to increase the number of bacteriorhodopsin proteins in the cytoplasmic membrane to collect photons of light. The retinal conjugated to bacteriorhodopsin becomes excited, and this process is coupled to the translocation of protons across the cytoplasmic membrane. As protons accumulate on the outer surface of the membrane, the proton motive force is coupled with the activity of ATPase, and ultimately ATP energy is synthesized.
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Adiabatic cooling reduces air temperatures by ____ oC per 1,000 m increase in altitude
a. 1 – 2 b. 2 c. 3 – 6 d. 8 – 10 e. 20 – 30
Why is mitosis also referred to as karyokinesis?
What will be an ideal response?
Crossing-over results in
A. chromosome duplication. B. new combinations of genes. C. point mutations. D. All of these answers are true.
In mRNA codons: UUU = phenylalanine, GUU = valine, UAU = tyrosine, UGU = cystine, GGU = glycine. If the third amino acid in a protein were valine, the codon sequence for that amino acid would be
A. UAU. B. GGU. C. UUU. D. GUU.