What causes a myosin II molecule to be able to form a bipolar fiber?
a. Myosin I
b. Myosin-like chain kinase
c. Calcium binding to calmodulin
d. Two of the above
e. Three of the above
Answer: c. Calcium binding to calmodulin
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All of the following substances are used to preserve foods EXCEPT
A. calcium propionate. B. sodium nitrite. C. nisin. D. biguanides. E. potassium sorbate.
Answer the following statements true (T) or false (F)
1, In insects, as in humans, the presence of a Y chromosome determines maleness. 2, If you were to examine a typical population at a single locus, you would find more copies of the wild-type allele than any other allele. 3, An individual with an SRY gene is a male mammal. 4, Only fathers can pass on pattern baldness to their sons.
When a nerve impulse travels from neuron 1 to neuron 2, neuron 1 is known as the _____
a. postsynaptic neuron b. presynaptic neuron c. synapse d. gated channel e. dendrite
A skeletal muscle deprived of adequate ATP supplies will _____
A) immediately relax B) enter a state where actin and myosin are unable to separate C) fire many more action potentials than usual and enter a state of "rigor" D) sequester all free calcium ions into the sarcoplasmic reticulum