An example of purple photosynthetic bacteria's metabolic flexibility is seen in Rhodospirillum rubrum using a "decision-making" process. When oxygen is present, the bacterium uses fermentation, photoheterotrophy, or photoautotrophy but if oxygen is absent, it switches metabolic pathways to grow chemoorganotrophically.
Answer the following statement true (T) or false (F)
False
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Proteins consist of
a. monosaccharides linked in chains. b. amino acid units. c. polysaccharide units. d. condensed fatty acids.
In the figure below, if food were the limiting factor in reproduction, how would the line change if unlimited food were available?
A) The line would slope up rather than down. B) The line would not change direction, but the clutch size values would significantly increase at each density. C) The line would be horizontal. D) The line would not change
Suppose that your father is heterozygous for sickle cell disease. Suppose also that you know your mom has two "good" alleles. What is the probability that you will have the disorder and/or carry the "bad" allele and be able to pass it on to your children?
a. 25% for you, and 25% for your children b. 0% for you, and a possibility of passing it on to your children c. 0% for you, and you do not need to worry about passing the "bad" allele on to your children d. 50% for you, and 50% for your children
In the DNA double helix, the two strands are joined by _____.
A) phosphate bonds B) hydrogen bonds C) covalent bonds D) deoxyribose