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

Biology & Microbiology

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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.

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Which cells of the pancreas produce somatostatin?

a. alpha cells b. beta cells c. delta cells d. F cells e. gamma cells

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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

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