HIV infects cells by recognizing the cell-surface markers with its own
A. glycoproteins.
B. capsid protein.
C. reverse transcriptase.
D. DNA.
E. enzymes.
Answer: A
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Which of the following is true concerning a morphological phylogenetic tree with 15 characters and 23 changes, and a molecular phylogenetic tree with 150 characters and 345 changes that contain the same taxa?
A. The molecular tree is a better estimate of the true relationships of the taxa. B. The molecular tree is the true representation of the relationships between the taxa. C. The morphological tree is the better estimate of the true relationships between the taxa because it has a shorter length. D. The morphological tree is the true representation of the relationships between taxa as it has the shorter length.
Which of the following is paired incorrectly?
A) plants; cellulose cell wall B) algae; glycocalyx C) bacteria; peptidoglycan cell wall D) fungi; polysaccharide cell wall E) archaea; protein cell wall
The enzyme ________ is used by retroviruses to transfer information from RNA to DNA
a. RNA polymerase b. reverse transcriptase c. integrase d. helicase
What is the major function of the colon?
A. to churn food B. to form feces C. to digest/absorb D. to eliminate iron E. to serve as a passageway only