How are symptoms of an infection associated with the mode of transmission of the pathogen?
A) Lack of symptoms indicates that the infection is not transmissible to others.
B) The worse the patient feels, the more likely the disease is transmissible to others.
C) Bodily fluids produced during an illness are often rich in infectious organisms.
D) There is no relationship between symptoms and mode of transmission.
E) Bodily fluids are rarely a source of disease transmission during an infection.
Answer: C
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Bacteria with DNA described as having "hairpin ends with inverted repeats" must not have circular chromosomes.
Answer the following statement true (T) or false (F)
Flowering plants appeared in the fossil record in the:a
Cenozoic era. b. Late Cretaceous period. c. Paleozoic era. d. Jurassic and Lower Cretaceous periods. e. Tertiary period.
Which of the following do proteins and nucleic acids have in common?
A. They are both made of amino acids. B. Their structures contain sugars. C. They are hydrophobic. D. They are large polymers. E. They each consist of four basic kinds of subunits (monomers).
Inherited genetic information is coded in molecules of _____.
A) RNA B) DNA C) proteins D) amino acids