Which group is characterized by radially symmetrical members?
a. arthropods
b. cnidarians
c. flatworms
d. mollusks
e. annelids
b
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Which of the following is not a potential outcome of a gene duplication?
A) they may result in gene redundancy B) they may result in providing the raw material for evolution C) they may lead to the development of gene families D) they may produce phenotypic variation E) they may lead to translocation cross formation during synapsis
The sum of histone modifications and their interactions is called the ________
A) protein code B) expression code C) transcription code D) genetic code E) histone code
Depolarization of the neuron occurs when
A. the potassium gates open and potassium moves outside the cell. B. the sodium-potassium pump moves potassium inside the cell. C. the sodium-potassium pump moves sodium inside the cell. D. water moves to the outside of the cell and chloride ions follow. E. sodium gates open and sodium moves inside the cell.
Which of the following is a true statement about proteins?
A. Proteins are used to insulate the body from cold and protect it from abuse. B. Extra proteins are stored in the liver and brain. C. Proteins are made up of amino acids bonded together. D. Proteins are used to produce ATP for the cell. E. Even small changes in temperature and pH will immediately destroy a protein's shape and function.