The two types of bonding found in a DNA molecule are _____
a. ionic and covalent
b. covalent and peptide
c. ionic and hydrogen
d. peptide and hydrogen
e. covalent and hydrogen
ANSWER: e
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Neural transmission across a mammalian synapse is accomplished by _____
A) the movement of sodium and potassium ions from the presynaptic neuron into the postsynaptic neuron B) impulses traveling as electrical currents across the synapse C) impulses causing the release of a chemical signal and its diffusion across the synapse D) impulses ricocheting back and forth across the synapse E) the movement of calcium ions from the presynaptic into the postsynaptic neuron
Where do the microtubules of the mitotic spindle originate in both plant and animal cells?
a. microtubule organizing centers b. centromere c. chromatid d. centriole e. centrosome
Choose the one most appropriate answer for each.
A. irregular flower B. composite flower C. ovary D. endosperm E. stamen F. petal G. pollen grain H. carpel I. pistil J. anther K. megaspore L. sepal M. stigma N. pollination O. ovule
Heat is used in DNA sequencing to ________ the double strands of the molecule.
Fill in the blank(s) with the appropriate word(s).