Feeding levels in an ecosystem are also known as ____
a. nutritional levels
b. nourishment levels
c. trophic levels
d. niche levels
e. biome levels
ANSWER: c
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Which of the following statements about protein modifications is incorrect?
A. Addition of one or more sugar molecules results in a fully mature protein called a glycoprotein. B. Proteins can be modified by reversible addition or subtraction of a phosphate group. C. Proteins can be modified following the addition of a polyadenylated tail. D. Phosphorylation or dephosphorylation is a rapid way of activating or inhibiting proteins. E. Protein modification most often causes a change in conformation and thus a change in function.
With Scotties that have a genetic susceptibility to cancer, the mutated gene would be an
example of a(n) __________.
a. oncogene b. carcinogen c. type of receptor d. plaque
When the number of trinucleotide repeats in a gene is significantly above normal, it can produce a mutant phenotype
a. True b. False
Swim bladders ________
A) contain the gills B) are required for fish to exchange gases with the surrounding water C) are present in both bony and cartilaginous fishes D) help bony fish maintain buoyancy