Which of the following is the template for transcription?
A) The molecule that carries base triplets
B) The molecule that carries anticodons
C) The molecule that carries codons
D) The molecule that carries tRNA
E) The molecule that carries amino acids
A
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Differences between arterioles and metarterioles include the fact that arterioles
A) allow blood to bypass capillary beds. B) have a continuous smooth muscle layer in their walls. C) have a continuous smooth muscle layer in their walls and allow blood to bypass capillary beds. D) have an endothelial lining. E) All of the answers are correct.
Which of these is not a feature of the muscosa of the gastro - intestinal tracts?
(a) lamina propria (b) goblet cells (c) myentric plexus (d) plicae circulares
Which is true regarding cytokinesis?
A)The pinching in of the cytoplasm and cleavage furrow begins and ends after telophase is totally finished. B)Cytokinesis always begins and ends in telophase. C)The cytokinesis cleavage furrow is made by the mitosis spindle. D)Cytokinesis usually begins in anaphase.
Chemicals that signal the same cell that made them are called ________ messengers, while those that signal nearby cells are called_____ messengers.
A. paracrine; endocrine B. autocrine; paracrine C. endocrine; pheromone D. allomone; autocrine E. pheromone; prostaglandin