One way to genetically engineer S. cerevisiae is by homologous recombination. If a given sequence is thus introduced and is integrated via two regions of homology, is it more probably introduced as a linear or as a circular entity?
What will be an ideal response?
linear
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The covalent bonds connecting monomer units in sugars can be formed by the removal of a water molecule. This reaction is referred to as:
A. a hydrolysis reaction. B. an oxidation-reduction reaction. C. a dehydration reaction. D. a hydration reaction.
57. Eukaryotic cells are 10–100 times the size of prokaryotic cells. How do eukaryotic cells resolve the surface-area-to-volume limitations that favor smaller cells?
A. They have pumps that move gases and nutrients through the cell. B. None of the biochemical reactions in prokaryotes occur in eukaryotes. C. Organelles keep reactions compartmentalized and concentrated. D. Gases are taken up by active transport. E. They have membrane folding similar to some prokaryotes.
Mesophyll cells are:a
arranged tightly together. b. separated by intercellular spaces.
c. responsible for the opening and closing of stomata. d. devoid of chloroplasts. e. covered by a waxy cuticle, which they secrete
Wetlands are generally classified by their vegetation. Wetlands dominated by trees and shrubs are ________ and wetlands dominated by grasses and sedges are ________.
A. marshes; swamps B. bogs; swamps C. swamps; marshes D. marshes; pine savannas