Which of the following contain the 9 + 2 arrangement of microtubules, consisting of nine doublets of microtubules surrounding a pair of single microtubules?
A) motile cilia and primary (nonmotile) cilia
B) flagella and motile cilia
C) basal bodies and primary (nonmotile) cilia
D) centrioles and basal bodies
B
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In general, in a sample of n individuals, the frequency of an allele is
A. the number of occurrences of the allele. B. the number of occurrences of the allele divided by n. C. the number of occurrences of the allele divided by twice the number of individuals in the sample (2n). D. twice the number of occurrences of the allele divided by n.
Which of the following might account for the general structural and functional differences between a nerve and smooth muscle cell within an individual?
A. The proteome differs between muscle and nerve cells. B. The genome (DNA) differs between muscle and nerve cells. C. The relative amounts of certain proteins differ between muscle and nerve cells. D. The proteome and the relative amounts of certain proteins differ between muscle and nerve cells. E. The genome (DNA) and the relative amounts of certain proteins differ between muscle and nerve cells.
A woman who is heterozygous for the hemophilia allele has a 100% chance of having an affected son
Indicate whether the statement is true or false
The p21 and p15 proteins are examples of
a. Cdk inhibitors. b. cyclins. c. oncogenes. d. growth factors.