A microbiology student sampled a drinking fountain and observed small round colonies growing on his nutrient agar after incubating the plate for 48 hours. He made a slide from one of the colonies growing on the plate. He looked at the slide under the light microscope and noticed that none of the cells had nuclei. Based on this information, what can he determine concerning the colonies growing on his plate?
A) They are bacterial colonies
B) They are fungal colonies
C) Without staining, there is not enough information to make any determinations
A) They are bacterial colonies
Feedback: Bacterial cells are prokaryotic and have no nucleus
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a. bitter b. salty c. sour d. sweet e. umami
Tumor suppressor genes function to
A) prevent gene expression of oncogenes. B) prevent release of growth factors. C) slow down unchecked cell growth, differentiation, division, or adhesion. D) produce proto-oncogenes. E) stimulate metastasis.
Scientific names of organisms consist of two English terms.
a. true b. false
All the offspring of a cross between a black-eyed Mendelian and an orange-eyed Mendelian have black eyes. What is the expected phenotypic ratio of a cross between two orange-eyed Mendelians?
A) 3 black-eyed:1 orange-eyed B) 0 black-eyed:1 orange-eyed C) 1 black-eyed:3 orange-eyed D) 1 black-eyed:0 orange-eyed