Assume Saccharomyces cerevisiae is grown in a nutrient medium containing the radioisotope 35S. After a 48-hour incubation, the 35S would most likely be found in the S. cerevisiae's
a. Carbohydrates.
b. Nucleic acids.
c. Water.
d. Lipids.
e. Proteins.
Ans: e. Proteins.
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The multiple genetic and environmental factors affecting complex traits imply that different people can have the same disease for different reasons
A. true B. false
Which of the following represents the correct order of appearance of characters in fungal evolution?
A. chitinous cell walls, hyphae, regular septa, complex multicellular fruiting bodies B. chitinous cell walls, hyphae, complex multicellular fruiting bodies, regular septa C. hyphae, chitinous cell walls, complex multicellular fruiting bodies, regular septa D. hyphae, regular septa, chitinous cell walls, multicellular fruiting bodies E. multicellular fruiting bodies, regular septa, hyphae, chitinous cell walls
Recent fossil discoveries may represent the earliest animal species ever found. How old are they?
a. 430 million years old b. 25 million years old c. 650 million years old d. 5 billion years old
In carrier protein function kinetics, Km is the
A) maximal rate of solute transport. B) solute concentration at which the transport rate is half maximal. C) initial rate of transport at any concentration. D) constant rate of transport regardless of concentration gradient. E) standard free energy change used to calculate the maximal rate of transport.