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.

Biology & Microbiology

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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.

Biology & Microbiology

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

Biology & Microbiology

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)

Biology & Microbiology

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

Biology & Microbiology