You are studying cell cycle progression in yeast cells. If you could prevent cdc2 from associating with the mitotic cyclin, the cells would
A. arrest in G2.
B. arrest in S.
C. arrest in G1.
D. arrest in metaphase.
E. arrest in prometaphase.
Answer: A
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The determination of carbohydrate utilization patterns for the differentiation of Neisseria spp. and M. catarrhalis is best performed by:
a. incubation of inoculated cysteine trypti-case soy agar (CTA) with 1% dextrose, maltose, lactose, and sucrose for 48 to 72 hours. b. oxidative-fermentative (OF) medium with dextrose, maltose, lactose, and sucrose. c. heavy inoculation of buffered, low-peptone substrate with dextrose, maltose, lactose, and sucrose. d. carbohydrate testing strips.
Pollination is the arrival of pollen grains from the ________ on a receptive ________
a. anther / stigma b. style / stigma c. stigma / anther d. sepal / style
The average number of individuals of the same species per unit of surface area at a given time is the
a. population density b. population growth c. population birth rate d. population size e. carrying capacity
On which continent would you have seen the very earliest members of Homo sapiens?
A) Europe B) Asia C) Africa D) Australia