Which of the following components is/are found in the cell walls of gram-positive bacteria but NOT gram-negative bacteria?
A. Cytoplasmic membrane
B. Lipopolysaccharide
C. Outer membrane
D. Peptidoglycan
E. Teichoic acid
Ans: E. Teichoic acid
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A site at the 5' end of a gene where RNA polymerase attaches to initiate transcription is called a(n).
A. operon. B. repressor. C. promoter. D. operator. E. CAP.
The end of the nucleic acid chain that grows by adding more nucleotides is always the
A. 5 prime end. B. C terminal. C. N terminal. D. 3 prime end.
According to Nicholas Katsanis at Duke University, which of the following are likely to be complex
traits?
a. schizophrenia b. diabetes c. hypertension d. obesity e. all of these
A population of ground squirrels has an annual per capita birth rate of 0.06 and an annual per capita death rate of 0.02. Estimate the number of individuals added to (or lost from) a population of 1,000 individuals in one year.
A) 120 individuals added B) 40 individuals added C) 20 individuals added D) 400 individuals added E) 20 individuals lost