Which protein relaxes supercoils by nicking the DNA?
A) topoisomerase
B) helicase
C) primase
D) ligase
E) telomerase
A) topoisomerase
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Imagine that a cell had no motor proteins. Which processes would not be able to occur?
rev: 06_13_2016_QC_CS-53689 _____ Cell division _____ Fertilization of an egg by a sperm cell _____ Protein translation _____ Maintenance of cell rigidity
Which of the following statements is NOT true of the
human female? a. She produces all the eggs that she ever will before she is born. b. The process of meiosis may take 30 to 50 years to complete. c. The primary oocytes lay dormant until puberty. d. She will normally produce more gametes than her male counterpart. e. It is possible that more than one egg will be released at ovulation.
At one time it was thought to be impossible to operate within the body cavities. Then the Canadian doctor, William Beaumont, operated on a patient with a gunshot wound to the stomach. A few decades later came breakthroughs in heart operations and transplants. The 1990s was called the decade of the brain because of the extensive research being done on how the brain functions. Name the body cavities associated with these breakthroughs in order.
A. abdominal-dorsal-thoracic. B. abdominal-thoracic-dorsal. C. thoracic-dorsal-abdominal. D. thoracic-abdominal-dorsal. E. dorsal-thoracic-abdominal.
A teenager shows up at a clinic with lesions on his face. The sores are raised, light-colored bumps with a waxy texture. A few similar lesions are present on the torso as well. With which of the following viruses might he be infected?
A. human herpesvirus 1 B. B19 virus C. human herpesvirus 4 D. molluscum contagiosum E. papillomavirus