True or False: Only humans have a biological clock
A. true
B. false
B
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Protein disulfide isomerase:
A. reduces disulfide bonds. B. facilitates posttranslational modification of a protein. C. catalyzes the breakage and formation of disulfide bonds. D. reduces disulfide bonds and facilitates posttranslational modification of a protein. E. reduces disulfide bonds, facilitates posttranslational modification of a protein, and catalyzes the breakage and formation of disulfide bonds.
If one of the parents in a dihybrid cross possesses the PpTt alleles, which allele combination is not possible in their gametes?
a. PT b. Pp c. Pt d. pT e. pt
Members of the phylum ____ exhibit radial symmetry, with their body parts arranged regularly around
a central axis.
a. Porifera b. Mollusca c. Cnidaria d. Platyhelminthes e. Chordata
The reactant (reactants) of photosynthesis is (are)
A. oxygen. B. water and carbon dioxide C. chlorophyll. D. glucose. E. glucose and oxygen.