What is the active site?
a. The bottom of the substrate
b. The site on the enzyme in which the substrate attaches.
c. The site on the reactant in which the enzyme attaches.
d. The surface of the enzyme.
e. The site on the substrate in which the enzyme attaches.
b
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Which of the following are not present in the cells of fungi?
a. cell walls b. chloroplasts c. endoplasmic reticulum d. mitochondria
Which cutaneous receptors are sensitive to pressure?
A. Pacinian corpuscles and Ruffini endings B. Krause end bulbs and Merkel disks C. Root hair plexus and Krause end bulbs D. Pacinian corpuscles and Meissner corpuscles E. Ruffini endings and Merkel disks
In his studies of colonization of hard substrates by various subtidal invertebrates, Michael Keough found that, among isolated bare patches, __________ more successfully colonized the smaller patches.
A) the better competitors, tunicates and sponges, B) the disturbance-adapted species, bryozoans and polychaetes, C) the large predators, such as starfish, D) microbial films, consisting of bacteria and fungi,
Lipoproteins are important for
a. transport of fats in the blood and lymphatic system. b. synthesis of triglycerides. c. synthesis of adipose tissue. d. enzyme production.