Why do the photosynthetic tissues of plants look green?
What will be an ideal response?
Photosynthetic tissue contains chlorophyll. Chlorophyll absorbs blue and red light, and transmits or
reflects most of the wavelengths in between. Therefore, we see the wavelengths that are not used by
the tissue in photosynthesis, which is primarily green light.
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To promote the translational activity of ribosomes in human cells for synthesizing viral proteins during viral infection, viruses
A) chemically modify (e.g., cap and methylate) the transcripts. B) keep a ribosome binding site specific to human ribosomes on their genome. C) maintain introns and sometimes extrons in their genomes to appear as eukaryotic mRNA. D) only adhere to and infect metabolically active host cells where protein synthesis is high.
An organism described as oxidase-positive, (K/NC) on TSI media, growth at 42°C, and produces a bright bluish-green pigment on Mueller-Hinton agar is most likely:
a. P. aeruginosa. b. Pseudomonas fluorescens c. B. cepacia d. B. mallei.
Coevolution is
a. where each species is a selective agent that shifts the range of variation in the other. b. random association between two individuals that allows similarity patterns to emerge. c. resource partitioning between two related species. d. mutualistic associations and commensalism. e. none of these
The type of energy metabolism that is anaerobic is known as ________ .
a. the electron transport chain b. the Krebs cycle c. glycolysis d. lactate fermentation e. phosphorylation