What closes nicks between DNA fragments, forming a covalent bond that ties or joins the fragments together?
a. DNA ligase
b. helicase
c. topoisomerase
d. primase
Ans: a. DNA ligase
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The concept of homeostasis originated with:
A. Claude Bernard. B. Charles Darwin. C. James Watson. D. Rosalind Franklin. E. Gregor Mendel.
Climate
a. changes with the seasons. b. refers to the atmospheric conditions at a particular place at a particular time. c. is determined by temperature and availability of water. d. is determined by the organisms living in a particular area. e. is the same throughout the globe.
Which cells of the pancreas produce somatostatin?
a. alpha cells b. beta cells c. delta cells d. F cells e. gamma cells
Most vessels that feed abdominal organs are branches off the ____
a. ascending aorta b. abdominal aorta c. thoracic aorta d. superior vena cava e. inferior vena cava