Chitin, a modified form of cellulose, is not only cross-linked with proteins but its glucose units are modified with atoms of:
A. nitrogen.
B. hydrogen.
C. oxygen.
D. sulfur.
E. phosphorous.
A. nitrogen.
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If a substance is reduced, it gains electrons
Indicate whether the statement is true or false.
Monoglycerides and fatty acids diffuse into a brush border cell, where they form triglycerides and combine with
proteins to form __________. Fill in the blank(s) with the appropriate word(s).
Which is false regarding the GGC gene?
a. It is present in humans, mollusks, and insects. b. It codes for an enzyme that regulates pattern formation in cone shells. c. It is more than 500 million years old. d. Today the enzyme product of the gene has different functions in different lineages. e. None of these are false
Which theory about the cause of colony collapse disorder has no evidence?
a. that pathogens are the cause b. that interference from cellphone towers is the cause c. that pests are the cause d. that drought is the cause