Nuclear envelopes form during which phase of mitosis?

A) Anaphase B) Prophase C) Metaphase D) Telophase


D

Biology & Microbiology

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Quality control results for disk diffusion AST using appropriate ATCC strains of bacteria showed zone size diameters decreasing over time for a few antimicrobials. Which of the follow-ing statements is a possible explanation?

a. Antimicrobial disks were stored in a frost-free freezer. b. Concentration of the bacterial inoculum was 5 105 CFU/mL. c. Depth of Mueller-Hinton agar plates measured 3 mm. d. Plates were incubated less than 16 hours in ambient air.

Biology & Microbiology

Which animal has a gastrovascular cavity?

a. earthworm b. fish c. hydra d. insect e. sponge

Biology & Microbiology

Phytochrome is converted from the inactive to

the active form by being exposed to light of what color? a. far red b. red c. yellow d. blue e. none of these

Biology & Microbiology

If a protein is supposed to consist of the amino acid sequence valine-valine-histidine and instead it consists of the sequence alanine-valine-histidine, most likely 

A. there has been a point mutation in the first codon. B. there has been a point mutation at the eighth base pair. C. the change will not be noticed. D. this is a gross mutation; the organism will not survive.

Biology & Microbiology