Which of the following is/are required with actin and myosin in order to initiate muscle contraction?
A. Calcium and phosphate
B. Calcium and ATP
C. ATP
D. Phosphate
E. Calcium
Answer: B
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The embryo develops from cells of the
a. blastocyst outer layers. b. blastocyst inner cell mass. c. gastrula mesoderm. d. gastrula ectoderm. e. gastrula endoderm
Cystic fibrosis is caused by a gene encoding a protein involved in ________
A) metabolism of adenosine triphosphate B) chloride transport C) oxygen transport in blood cells D) regulating cell cycle control E) None of these choices
How are immune cells able to detect foreign pathogens?
A) They detect foreign, unfamiliar chemical substances released by the invading cells. B) They are able to detect structures on the surfaces of foreign cells that are not found in the host. C) They can compare the DNA sequences from the foreign cells to host DNA.
The primary level of protein structure is composed of amino acids in a linear sequence joined by peptide bonds.
Answer the following statement true (T) or false (F)