The larger the initial size of a population, the faster it can reach K
a. true
b. false
a
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The order of gene transfer in an Hfr × F- mating is best represented by
A. part of the chromosome followed by the plasmid followed by the rest of the chromosome. B. all plasmid genes followed by some or all of the chromosome. C. part of the plasmid followed by the chromosome followed by the rest of the plasmid. D. the chromosome followed by the plasmid.
Pharmacogenetics is a new field of study that arose from the study of
A) cholesterol uptake. B) mixed-function oxidases. C) ATP-dependent calcium ATPases. D) phagocytosis by specifically vertebrate white blood cells. E) residual bodies.
In the accompanying figure, why does the curve sharply drop after approximately 45°C instead of mirroring the slope
of the line going from 0-40°C?
a. At high temperatures, the reactions proceed so quickly that enzymes are no longer helpful or required. b. This is true of all catalysts and is not due to any special features of enzymes.
c. The kinetic energy of the reactants is so great that it destabilizes the enzyme and diminishes the enzyme's activity. d. The kinetic energy of the reactants is lower than that of the products, forcing a change in enzyme activity. e. The enzyme begins to denature above a certain temperature, eliminating all catalytic activity of the protein.
Most of the photosynthetic activity of a leaf takes place in the.
A. vascular bundles B. waxy cuticle and epidermis C. palisade and spongy mesophyll D. guard cells and stomata