Indicate which of the three major classes of cytoskeletal elements each statement below refers to
A. monomer that binds ATP
B. includes keratin and neurofilaments
C. important for formation of the contractile ring during cytokinesis
D. supports and strengthens the nuclear envelope
E. their stability involves a GTP cap
F. used in the eukaryotic flagellum
G. a component of the mitotic spindle
H. can be connected through desmosomes
I. directly involved in muscle contraction
J. abundant in filopodia
A. actin
B. intermediate filaments
C. actin
D. intermediate filaments
E. microtubules
F. microtubules
G. microtubules
H. intermediate filaments
I. actin
J. actin
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For a temperate phage to produce more phage, which of the following must happen?
A. Lysogeny B. Lysogenic conversion C. Induction D. Prophage formation
Why does phenylalanine accumulate in patients with phenylketonuria?
A. They lack an enzyme to break down phenylalanine. B. They lack an enzyme to produce phenylalanine. C. They produce too much phenylalanine. D. They lack an inhibitor of an enzyme to break down phenylalanine. E. They eat more phenylalanine than most people.
The pectoralis major muscle is located
a. in the chest. b. on the back. c. near the hips. d. in the upper leg. e. in the lower leg.
In 2005, the amount of animal waste produced by factory farms was how many times the amount of waste produced by the human population of the United States?
A) 50 B) 95 C) 100 D) 130