Which of the following vectors must be transformed to get into bacterial cells?
A. yeast.
B. fungus.
C. plasmid.
D. virus.
E. bacteriophage.
C. plasmid.
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How are the epigenetic marks of a particular chromatin state preserved during cell division?
A. Parental, marked H2A-H2B dimers stay associated with strands after replication and recruit new H3-H4 tetramers. B. H2A-H2B dimers and H3-H4 tetramers come off during replication and assemble with unmarked histones. These new octamers then rebind to the newly replicated DNA to form nucleosomes. C. Parental, marked H3-H4 tetramers stay associated with strands after replication and recruit new H2A-H2B dimers. D. Histone chaperones make sure that at least one component of each new nucleosome is marked. E. None of these choices is correct.
Which of these structure-function pairs is incorrect?
A. stomata-regulate gas exchange B. trichomes-repel herbivores C. cuticle-layer of cells where light reactions occur D. guard cells-control stomatal pore size
Low-nutrient, oligotrophic waters will usually become stratified and have an anaerobic hypolimnion at certain times of the year.
Answer the following statement true (T) or false (F)
An autosomal recessive disorder in which a young person produces thick mucus and excessively salty sweat and has serious respiratory problems is ________
Fill in the blank(s) with correct word