How does the lipopolysaccharide from Neisseria differ from other Gram-negative bacteria?
A. it activates B cells
B. It lacks endotoxin activity
C. It is formed of a longer chain of polysaccharides
D. it is formed of a shorter chain of polysaccharides
Ans: D. it is formed of a shorter chain of polysaccharides
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In sickle cell anemia, affected individuals carry ____
a. one of several different nucleotide substitutions b. the same single nucleotide substitution c. more than one nucleotide substitution
d. a number of mutant alleles e. one mutant allele in several genes
Suppose an Rh- mother gives birth to an Rh- baby. Is there a danger of hemolytic disease of the newborn developing
during a subsequent pregnancy? Why or why not? What will be an ideal response?
A(n) ________ group is treated like an experimental group, except for the one variable being tested
Fill in the blank(s) with correct word
The present rate of species loss ________
A) suggests that about 25% of all plant and animal species may be extinct by the end of the century B) is about the same as it has been during the last 100,000 years C) is as much as 100 times higher than at any time in the last 100,000 years D) is slower than in recent years because of conservation efforts