Constriction of the pupil of the eye is caused by ____
a. skeletal muscle
b. cartilage
c. tendons
d. smooth muscle
e. cardiac muscle
ANSWER: d
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) steroids B) terpenes C) fatty acids D) triacylglycerols E) pectins
The site on an enzyme that will bind the substrate is called the
A) prosthetic group. B) catalyst. C) active site. D) metastable site. E) activation site.
Which factor is the most important algal contribution to the fungal component of a lichen?
A. Improved water conservation B. Mechanical protection C. Photosynthetically derived food D. Conversion of nitrogen gas to nitrates E. Pigment for camouflage
Which of these traits best describes an adenovirus?
A. Naked and helical B. Naked and icosahedral C. Enveloped and helical D. Enveloped and icosahedral