Both DNA and RNA _____
A) are information-containing molecules
B) show primary, secondary, tertiary, and quaternary structure
C) are highly reactive catalysts in cells
D) naturally occur as a double helix
Answer: A
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Which of the following statements is incorrect concerning sister chromatids?
A. The formation of sister chromatids doubles the amount of DNA in a cell. B. Sister chromatids consist of two identical copies of a single homologue. C. Sister chromatids are held together at the centromere by kinetochore proteins. D. Sister chromatids are formed during the S phase of the cell cycle. E. Sister chromatids separate during telophase.
According to the convention for properly writing Latin binomials, the scientific name for modern human beings
should be written as ____.
a. Homo sapiens b. Homo Sapiens c. Homo sapiens d. homo sapiens e. h. sapiens
You take a sample of bacteria with DNA that contains only 14N and allow them to replicate in a medium that contains only 15N. After 3 rounds of replication, what percent of the DNA molecules will contain one strand with only 14N and one strand with only 15N? Enter your answer as a whole number without the percent sign. For example, 5% would be entered as 5 and 37% would be entered as 37.
Fill in the blank(s) with the appropriate word(s).
Relapsing fever involves
A. soft-bodied ticks transmitting Borrelia hermsii. B. initial symptoms of fever, headache, fatigue. C. late symptoms of vomiting, muscle aches, damage to liver, spleen, heart and kidneys. D. human body louse transmitting Borrelia recurrentis. E. All of the choices are correct.