Is a ribozyme a true enzyme?
a. Yes, because it is a catalyst.
b. No, because it is not a protein.
c. No, because it cannot catalyze a reaction.
d. Yes, because it can synthesize a protein.
e. No, because it doesn't require cofactors.
ANSWER: b
You might also like to view...
The human vestibular system is made up of:
A. the malleus, stapes, and incus B. two statocyst chambers and three semicircular canals C. the cochlea D. the pinna and the tympanic membrane
Which of these is NOT a lipid?
A. phospholipid B. cholesterol C. steroids D. glycogen E. wax and oils
How do the daughter cells at the end of mitosis and cytokinesis compare to their parent cell when it was in G1 of the cell cycle?
a. The daughter cells have half the number of chromosomes and half the amount of DNA. b. The daughter cells have half of the amount of cytoplasm and half the amount of DNA. c. The daughter cells have the same number of chromosomes and the same amount of DNA. d. The daughter cells have the same number of chromosomes and twice the amount of DNA.
Which of the following is normal oral and nasopharyngeal flora but is involved in infective endocarditis in adults who have underlying congenital or rheumatic heart disease?
A. Haemophilus influenzae B. Haemophilus aphrophilus C. Haemophilus aegyptius D. Haemophilus ducreyi E. All of the choices are correct