Baker's yeast is a single-celled ascomycete that is used in bread making. Why does yeast make bread dough rise?
A. Yeast cells suck in air when trapped in dough.
B. Multiplication of yeast physically expands the dough.
C. The fungal cells burst causes the dough to expand.
D. Carbon dioxide is produced during fermentation.
Answer: D
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In this generalized illustration of
gametogenesis, the four cells in the right column should be labeled a. sperm. b. eggs. c. ovum and three polar bodies. d. secondary spermatocytes. e. diploid.
Which process marks the start of the dikaryotic stage (n + n) in the fungal reproductive cycle?
a. mitosis b. meiosis c. karyogamy d. fertilization e. plasmogamy
If you want to set up a controlled experiment to determine the effects of caffeine on sleeping behavior in mice, you take a group of mice and divide it into two groups. Both are fed the same food, both are watered, both have 12 hours daylight, and 12 hours dark. Group one is given caffeine. What is appropriate to give to group two?
A. 2 ´ amount of caffeine B. 1/2 ´ amount of caffeine C. No caffeine D. Caffeine in different form
The AUC and AUA codons in mRNA both specify isoleucine. What feature of the genetic code explains this?
a.) complementarity b.) nonsense codons c.) universality d.) degeneracy