Muscles originate from the ____
a. ectoderm only
b. endoderm only
c. mesoderm only
d. ectoderm and endoderm
e. ectoderm and mesoderm
ANSWER: c
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Explain how light energy is transformed into chemical energy in the light-dependent reactions and describe where the energy is stored at the end of the light-independent reactions
What will be an ideal response?
Myosin II is found in skeletal muscle and the contractile ring. It is a two-headed myosin with tails that can form thick filaments. Other myosins such as myosin I or myosin V do not form thick filaments and yet are still capable of producing movement along actin filaments. To what do the tail(s) of myosin I or myosin V bind?
a. Cargo such as membrane vesicles or intermediate filaments b. Centrosomes c. Chromosomes d. Tubulin
In the fluid-mosaic model, the fluid properties are associated with the nature of the ______ and the mosaic pattern is established by the _______.
a. nucleic acids; phospholipids b. phospholipids; embedded proteins c. embedded proteins; d. cholesterol phospholipids; nucleic acids
Poliovirus receptors are found ________.
A. in cells of all tissues B. in spinal cord anterior horn cells only C. in gut cells only D. in nasopharynx, gut, and spinal cord anterior horn cells