Which of the following represents the lowest level of chromosome condensation?
A. Radial loop domain
B. 30 nm fibers
C. Heterochromatin
D. Nucleosome
E. Euchromatin
D
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Snapping division is a hallmark trait of ________ which can be visualized under a microscope by ________
A) Actinobacteria / two adjacent cells linked, appearing as an M dividing into four B) Actinobacteria / one cell appearing as a V dividing into two C) Coryneform bacteria / two adjacent cells linked, appearing as an M dividing into four D) Coryneform bacteria / one cell appearing as a V dividing into two
What type of bond contributes to a protein's secondary structure?
a. peptide bonds b. covalent bonds c. ionic bonds d. hydrogen bonds e. protein bonds
Which of the following statements about dehydration reactions is false?
A) One monomer loses a hydrogen atom, and the other loses a hydroxyl group. B) H2O is formed as the monomers are joined. C) Covalent bonds are formed between the monomers. D) Animal digestive systems utilize this process to break down food.
Select the correct statements about MacConkey agar. (Check all that apply)
A.The lactose in MacConkey agar is inhibitory to Gram positive cocci. B.The selective ingredients in MacConkey agar are crystal violet and bile salts. C.The growth of Gram positive bacteria is inhibited on MacConkey agar. D.Most Gram negative bacilli grow well on MacConkey agar. E.The pH indicator in MacConkey agar is crystal violet. F.The differential ingredients in MacConkey agar include lactose and neutral red. G.Lactose-fermenting Gram negative bacilli will form pink-purple colonies on MacConkey agar.