The component(s) of a virus that is/are extended from the envelope for attachment is/are the:
A) capsomeres
B) spikes
C) nucleic acid
D) viral whiskers
Ans: B) spikes
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Which of the following is not true about energy stored and released in cells?
A. The free energy stored in the phosphodiester bonds of ATP can be used to drive biosynthetic reactions of metabolism. B. ATP can be hydrolyzed to ADP and Pi and the energy released used to form chemical bonds. C. The hydrolysis of ATP results in a large negative change in the free energy. D. ATP can be hydrolyzed to AMP and PPi but the energy released is not used to form chemical bonds. E. All of these statements are true.
How did Bayliss and Starling demonstrate that the small intestine secretes chemical signals that stimulate the pancreas to respond to acid?
A. They injected acid into a dog's small intestine after dissecting away all the nerves. B. They exposed a dog's small intestine to a cell extract made from a second dog's small intestine that had been exposed to acid. C. They cut out a piece of the small intestine and exposed it to acid. D. They injected pancreatic secretions from a dog previously exposed to acid into the small intestine of a second dog. E. They injected acid into the pancreas after removing all of its innervation.
Bones, joints, and muscles form part of which organ system(s)?
a. skeletal b. muscular c. integumentary d. both skeletal and muscular
Where is the auxin receptor ABP1 located in plant cells?
a. cell wall b. cytoplasm c. endoplasmic reticulum
d. plasma membrane e. nucleus