Which is a major group of enzyme-linked receptors?
a. G proteins
b. ion channels
c. tyrosine kinases
d. phospholipases
e. adenylyl cyclases
c
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Filter feeders on coastal shelves tend to dominate in areas that have:
a. moving currents and coarse sediments. b. no currents and fine sediments. c. silty areas. d. muddy areas.
Refer to Figure 12-2. The structures represented by the letter E are called:a
leading fragments b. Okazaki fragments. c. replication forks. d. nucleosomes. e. DNA polymerases.
Carbon dioxide and water can combine to form glucose, water and oxygen. What is required for that process to occur?
A. Energy from the process of cellular respiration B. Light energy from the sun C. Mitochondria D. Nothing, this is a spontaneous reaction
An advantage of sexual reproduction and meiosis is that
A) production of gametes generates energy. B) organisms remain stable in a changing environment. C) it increases genetic diversity. D) many offspring are produced in a short period of time.