Studies on cell cycle mutants in budding and fission yeasts demonstrated that cdc2 and cdc28 both encode a
a. protein kinase.
b. protein phosphatase.
c. ubiquinating enzyme.
d. growth factor.
Ans: a. protein kinase.
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The size of a eukaryotic ribosome is ________.
A. 70S B. 40S C. 80S D. 50S E. 30S
Molecular techniques have revealed that ____ caused the loss of forelimbs in snakes
a. the absence of Hoxc6 and Hoxc8 genes in snake genomes
b. selection in dinosaurian ancestors of snakes c. the lack of usefullimbs d. mutations in limb buds e. changes in the spatial pattern of Hoxc8gene expression
In the accompanying figure, the chance that individual IV-7 is a heterozygous carrier is __________
A) 1/4 B) 1/3 C) 1/2 D) 2/3 E) 3/4
Phosphate groups are important components of:
a. triglycerides. b. nucleic acids. c. amino acids. d. structural polysaccharides. e. All of the above are correct.