Actin is a structural subunit of
a. myosin.
b. microtubules.
c. intermediate filaments.
d. microfilaments.
e. all of these.
Answer: d
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a. H2O, ATP, and NADPH b. CO2, NADPH, and H2O c. CO2 and NADPH d. ATP, NADPH, H2O, and CO2 e. NADPH, ATP, and CO2
An oncogene is a _____
a. normal gene that promotes mitosis b. gene that codes for a growth factor that stimulates cell division c. gene that codes for tumor suppressing proteins d. mutated gene that results in tumor growth e. mutated gene that results in cell cycle arrest
Which of the following allocates the greatest amount of biomass to photosynthetic tissue and the least amount to supportive tissue?
A) trees B) shrubs C) lianas D) grasses
What hypothetical hormone promotes flowering but has never been successfully isolated?
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