The following will increase the rate of reaction:
A. free energy of product lower than that of substrate
B. free energy of product lower than that of transition state
C. interactions between atoms during the transition state
D. enzyme complementary to substrate
E. number of covalent groups combining with substrate during the reaction
C
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Regarding a mismatch of either the Rh antigen or the AB antigen, both
A. result in destruction of red blood cells by the foreign antigen. B. utilize complement to destroy red blood cells. C. utilize antibody-dependent cellular cytotoxicity to destroy the red blood cells. D. result in destruction of only leukocytes. E. utilize either complement or antibody-dependent cellular cytotoxicity to destroy red blood cells.
Which of the following is one of the compelling lines of evidence for the endosymbiont theory?
a. Mitochondria have their own genomes. b. Alpha-proteobacteria are often symbiotic with plants. c. Cell walls were present in prokaryote precursors. d. DNA is coiled around histone proteins.
One characteristic of an autosomal dominant trait is that ____
a. 50% of individuals with two affected parents will be affected b. if two affected individuals are homozygous, the risk of having an affected child is 1:4 c. heterozygous fathers will always have affected daughters d. every affected individual has at least one affected parent e. mothers always pass the trait on to their sons
During cell reproduction, chromatin fibers coil up into structures called
A) ribosomes. B) lysosomes. C) chromosomes. D) nucleoli.