An example of an important biological molecule that may contain the -NH2 group is:
A) a glucose molecule.
B) steroids.
C) a triglyceride.
D) an enzyme.
E) a starch.
Answer: D
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Most cycads are pollinated by insects
A. true B. false
Which enzyme is paired with the substance it digests?
a. lipase ?protein b. pancreatic amylase ? starch c. pepsin ?starch d. salivary amylase ?protein e. trypsin ? fats
In humans, XO individuals are females with Turner syndrome and XXY individuals are males with Klinefelter syndrome. Which of the following events cannot give rise to a Klinefelter male?
A) nondisjunction at meiosis I in the mother B) nondisjunction at meiosis II in the mother C) nondisjunction at meiosis I in the father D) nondisjunction at meiosis II in the father E) All of the choices could give rise to a Klinefelter male.
During embryonic development, the proembryo develops from the basal cell. Indicate whether the statement is true or false