Which protein blocks the interaction sites that produce skeletal muscle contraction?
a. actin
b. myosin
c. troponin
d. tropomyosin
e. sarcoplasmic reticulum
ANSWER: d
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Answer the following statements true (T) or false (F)
1. The internal structure of procaryotic flagella is the same as the internal structure of eucaryotic flagella. 2. The internal structure of eucaryotic cilia is the same as the internal structure of eucaryotic flagella. 3. The production of endospores by bacteria is a reproductive mechanism. 4. Bacteria never have cilia and eucaryotic cells never have pili. 5. The 3-Domain System of classification is based on differences in the structure of transfer RNA (tRNA) molecules.
A codon consists of two nucleotides
Indicate whether this statement is true or false.
The ear drum/ tymanic membrane ____ when sound waves hit it.
Fill in the blank(s) with the appropriate word(s).
The value of the three small bones of the middle ear is that they:
A) translate vibration into nerve impulses. B) amplify vibrations by concentrating them into a smaller area. C) connect the eardrum to the nerves of hearing. D) translate solid vibration into internal liquid vibration.