The nitrogenous base adenine is found in all members of which group?
A. proteins, triglycerides, and testosterone
B. ? glucose, ATP, and DNA
C. proteins, carbohydrates, and ATP
D. proteins, ATP, and DNA
E. ATP, RNA, and DNA
Ans: E. ATP, RNA, and DNA
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Multiple sensory receptors can synapse on a single neuron. The receiving neuron has a firing rate proportional to the number of signals received. Which of the following is this an example of?
A. temporal summation B. spatial summation C. action potential D. hyperpolarization
Answer the following statements true (T) or false (F)
1. Maternal effect genes are inherited via the mitochondria. 2. Epistasis often involves genes of an enzymatic pathway. 3. The actions of Xist result in an organism that is a phenotypic mosaic. 4. In biparental inheritance, paternal and maternal gametes provide chloroplasts to the zygote. 5. Genomic imprinting can result in offspring with identical genotypes that have different phenotypes.
If a drug binds irreversibly to a postsynaptic receptor to prevent the binding of an excitatory neurotransmitter, what is
the most likely result?
a. an increased number of IPSPs b. an increased number of EPSPs c. a prolonged hyperpolarization d. a decreased number of IPSPs e. a decreased number of EPSPs
The four stages of biofilm formation are
a. attachment, colonization, development, and dispersal. b. adherence, biosynthesis, maturation, and release. c. attachment, biosynthesis, maturation, and dispersal. d. adherence, infection, development, and activity.