In a karyotype it can be seen that a homologous pair of duplicated chromosomes will contain how many chromatids?
A. one
B. four
C. two
D. three
E. six
Answer: B
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As a plant cell grows and matures, additional layers are added to the cell wall to construct the more rigid ____,
a. middle lamella b. secondary cell wall c. primary cell wall d. plasma membrane e. central vacuole
Anchorage dependence of animal cells in vitro or in vivo depends on which of the following?
A) attachment of spindle fibers to centrioles B) response of the cell cycle controls to signals from the plasma membrane C) the binding of cell-surface phospholipids to those of adjoining cells D) response of the cell cycle controls to the binding of cell-surface phospholipids
The process of making a DNA copy of a DNA molecule is
A. transcription. B. replication. C. translation. D. protein synthesis.
Which common hospital pathogen is able to grow abundantly in soap dishes?
A. Salmonella B. Hemophilus influenzae C. Escherichia coli D. Pseudomonas E. Mycobacteria tuberculosis