Which of the following types of radiation is nonionizing and has the shortest wavelength?
A) ultraviolet light
B) infrared radiation
C) microwaves
D) X rays
E) gamma rays
A
Bloom's Taxonomy: Comprehension
Section: Physical Methods of Microbial Control
Learning Outcome: 9.18
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The B form of the DNA double helix contains a wider major groove and a narrower minor groove because the two polynucleotide strands are not positioned directly opposite one another in the helical cylinder.
Answer the following statement true (T) or false (F)
Which of the following statements about the electron transport chain in cell respiration is CORRECT?
A. Electrons move from NADH to a chain of proteins with lower electronegativities. B. The electron transport chain of proteins uses ATP to pump H+ across the inner mitochondria membrane against its electrochemical gradient. C. The loss in free energy of the electron initially donated by NADH is used to transport H+ across the inner mitochondrial membrane against its electrochemical gradient. D. The electron transport chain of proteins contains pores that are leaky to H+. E. The ATP synthase pump generates a H+ gradient across the inner mitochondrial membrane.
Which of the following characteristics of the fetus distinguishes it from the embryo?
A) Blood cells form and fill primitive blood vessels. B) The primitive streak appears. C) Bone replaces the softer cartilage. D) The neural tube begins to form.
Which of the following species living today is the most evolutionarily successful?
a. The house mouse (Mus domesticus) b. The housefly (Musca domestica) c. The Western gorilla (Gorilla gorilla) d. The irukangji, the most toxic box jellyfish (Carukia barnesi) e. All of the above species are equally successful because they are not extinct.