The placement of an organism into a domain is made on the basis of
A. G + C content.
B. cell ultrastructure.
C. ribosomal RNA
D. serological tests.
E. Gram-stain reactions.
Answer: C
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Protists that produce spores are especially difficult to kill because they contain cell membranes that are resistant to common disinfecting chemicals
Indicate whether the statement is true or false.
A new experimental pesticide is being tested by a large agricultural chemical company. An unfortunate side effect in plants treated with this new product is a decrease in ATP production in the chloroplasts
(Interestingly, production of ATP in the mitochondria is unaffected.) Given this observation, which of the following would you expect to be DIRECTLY affected by the new pesticide? A. the synthesis of triose phosphates from 3- phosphoglycerate B. the transport of electrons along the photosynthetic electron transport chain C. the carboxylation of RuBP by rubisco D. the oxidation of RuBP by rubisco
Enzymes function primarily by
a. forcing the reactants into an altered environment which in turn creates a change in the free energy of the reactants relative to the products. b. altering the equilibrium point of a particular reaction to favor the formation of products. c. increasing the probability that the reactants will come into close proximity to each other in the proper orientation for forming the transition state molecule. d. removing reactants from solution in a set ratio that enhances the chances of the remaining individual reactants interacting with each other. e. changing the ratio of reactants to products so that the forward reaction is favored.
The ________ are the most abundant type of seedless vascular plant.
Fill in the blank(s) with the appropriate word(s).