Which of the following is NOT a role of semen?
A) Semen dilutes sperm.
B) The acidity of semen helps neutralize the pH environment of a female's vagina.
C) Semen contains enzymes that enhance sperm motility.
D) Semen contains antibiotic chemicals that destroy bacteria.
B
You might also like to view...
Osteoarthritis is
A. a bacterial infection transmitted by ticks. B. an inflammation of any joint. C. a metabolic disorder caused by increased uric acid in blood. D. a condition that may involve an autoimmune disease. E. the most common type of arthritis.
A gallstone has completely blocked flow of bile into the small intestine. Where is the stone most likely lodged?
A. Hepatic duct B. Cystic duct C. Pancreatic duct D. Common bile duct
Which statement accurately describes spinal nerves?
A. Odd-numbered spinal nerves are sensory and even-numbered spinal nerves are motor. B. Each spinal nerve is mixed in that it contains some sensory axons and some motor axons. C. All spinal nerves are sensory nerves. D. Most spinal nerves are motor nerves. E. Spinal nerves are central axons contained within the vertebral canal.
The model that explains how an enzyme and substrate fit together is called the ________.
A. enzyme-substrate model B. induced-fit model C. conformational model D. lock-and-key model