Which of the following areas of investigation is considered a major driver of modern microbiology?
A) microbial classification
B) industrial microbiology
C) the etiology of infectious disease
D) genetics
E) food preparation
D
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Which of the following is not part of the lower respiratory system?
A. Sinuses B. Trachea C. Bronchi D. Bronchioles E. Alveoli
Plant cell walls are primarily composed of
A. protein. B. chromatin. C. glycogen. D. cellulose.
In sporadic cases of retinoblastoma, only two gene mutations are thought to be necessary in the same cell for a tumor to develop. This happens when an organism inherits a mutant allele and a wild-type allele forms the parents. When the wild-type allele
is mutated, resulting in tumorigenesis, this process is called, ________. A) gain of heterozygosity B) metastasizing C) attenuation D) loss of heterozygosity E) recombination
For each of the following sentences, fill in the blanks with the best word or phrase selected from the list below. Not all words or phrases will be used; each word or phrase should be used only once
The cell cycle consists of an alternation between __________________, which appears as a period of dramatic activity under the microscope, and a preparative period called __________________, which consists of three phases called __________________, __________________, and __________________. During M phase, the nucleus divides in a process called __________________, and the cytoplasm splits in two in a process called __________________. The cell-cycle control system relies on sharp increases in the activities of regulatory proteins called __________________, or __________________, to trigger S phase and M phase. Inactivation of __________________ is required to exit from M phase after chromosome segregation. APC G2 phase metaphase Cdks interphase microtubules condensation intraphase mitosis cyclin-dependent kinases kinesins myosins cytokinesis M phase S phase G1 phase M-Cdk S-Cdk G1-Cdk meiosis Fill in the blank(s) with correct word