Which of the Page 78following is not a function of proteins present in the plasma membrane?
a. Proteins assist the passage of materials into the cell.
b. Proteins interact with and recognize other cells.
c. Proteins bind with specific hormones.
d. Proteins carry out specific metabolic reactions.
e. Proteins produce lipid molecules.
e. Proteins produce lipid molecules.
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Which of the following is incorrect about archaeal translation?
A. Archaeal translation is coupled to transcription, similar to bacterial processes. B. Archaeal translation uses 70S ribosomes, similar to bacterial ribosomes. C. Archaeal translation may recognize ribosome binding sites homologous to bacterial Shine-Dalgarno sequences. D. Archaeal translation uses no chaperone proteins for folding new polypeptides.
True or False: The order of groups along the tips of a phylogenetic tree indicates how closely those groups are related
A. true B. false
While lancelets, members of the lineage ____, live mostly buried in the sand in warm, shallow marine habitats, they
do have well-developed segmented muscles and can move.
a. Petromyzontoidea b. Placodermi c. Cephalochordata d. Urochordata e. Myxinoidea
What is the fundamental purpose of staining in light microscopy?
a. To kill the specimen b. To make the specimen appear larger in the microscope c. To see the specimen without the aid of a microscope d. To increase the contrast and visibility of the specimen