During prophase I of meiosis, each chromosome consists of ____
a. one single-stranded DNA molecule
b. two sister chromatids
c. one sister chromatid
d. four sister chromatids
e. one double-stranded DNA molecule
ANSWER: b
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For some virulent phages, fragments of the host DNA may be included in the heads as the viral particles assemble,
providing the basis for ____.
a. transformation b. transmutation c. metabolism d. specific transduction e. generalized transduction
Did H. sapiens mate with H. neanderthalensis? How do we know? What will be an ideal response?
Viruses replicate by.
A) binary fission. B) budding of a daughter cell from the parent cell. C) producing reproductive spores. D) using a host cell to produce and assemble components.
Which of the following bacteria produce one of the deadliest bacterial toxins known?
A. Clostridium perfringens B. Clostridium difficile C. Clostridium tetani D. Clostridium botulinum E. Corynebacterium species