Keratin is an example of a ________ protein
Fill in the blank(s) with correct word
structural
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A deficiency of which essential element leads to intervenal chlorosis?
a. calcium b. potassium c. magnesium d. sulfur
Which of the following is false concerning the atom
in the figure? a. The number of protons and the number of electrons are equal. b. It has an atomic mass of 4. c. Electrons are moving around the nucleus. d. It has an atomic number of 2. e. The number of electrons exceeds the number of protons.
Calcium binding to ________ initiates skeletal muscle contraction
A) actin B) tropomyosin C) myosin D) troponin
Viral chromosomes exist in a variety of conformations and can be made up of ________
A) RNA only B) DNA only C) DNA, RNA, or protein D) DNA or RNA E) protein- or lipid-coding sequences