The figure above represents
a. the algae that were to give rise to plants.
b. protists.
c. fungi.
d. soil bacterium with primitive membrane folds.
e. all of these.
Answer: d
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Mendeleev found that when he arranged the known elements according to their atomic mass, the entries in the table exhibited a pattern of chemical properties that repeated itself in groups of eight elements. This led to the generalization now known as:
A. an atomic model. B. valance electrons. C. the periodic table. D. the octet rule.
What do enzyme-linked receptors and growth factor receptors have in common?
A. Both possess kinase activity when bound to a hormone. B. Both regulate specific G proteins when bound to a hormone. C. Both act as transcriptional factors. D. Both regulate the transport of ions through channels. E. Both seldom affect the expression of genes within the nucleus.
In hydrocarbons, electrons are shared equally in all bonds. Does this suggest that hydrocarbons are soluble or insoluble in polar solvents (such as water)?
a. soluble b. insoluble c. soluble at high temperatures only d. insoluble at high temperatures only
Which tissue type attaches to bones and is
responsible for producing body movements?
a. skeletal muscle b. neural c. epithelial d. smooth muscle e. connective