In a eukaryote, what is the best way to compare the number of genes in a genome to the number of proteins that the genome can produce and why?
A) The number of proteins is usually fewer than the number of genes due to alternate splicing.
B) The number of proteins is usually greater than the number of genes due to alternate splicing.
C) The number of proteins is equivalent to the number of genes due to alternative splicing.
D) The number of proteins is usually greater than the number of genes due to histone modification.
E) The number of proteins is usually fewer than the number of genes due to histone modification.
Answer: B
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A. haploid (2n) B. diploid (n) C. haploid (n) D. diploid (2n)
Which statement best reflects the current understanding of pollen-tube elongation?
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__________ lengthen stems, break dormancy in seeds and buds, and stimulate flowering. Fill in the blank(s) with the appropriate word(s)
Caffeine is an inhibitor of phosphodiesterase. Therefore, the cells of a person who has recently consumed coffee would have increased levels of _____
A) phosphorylated proteins B) cAMP C) adenylyl cyclase D) activated G proteins