Nitrogen has a higher electronegativity than hydrogen. As a result you would expect that ammonia (NH3) molecules can form ________ with each other.
A. hydrophilic bonds
B. hydrogen bonds
C. ionic bonds
D. covalent bonds
E. cohesive bonds
Answer: B
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Eutherian mammals are uniquely defined by:
A. having a placenta B. longer gestation periods because of more highly developed placentas C. having fur D. the young developing in a pouch E. laying eggs
Which is an accurate description of organelle genomes? (Select all that apply.)
A) Translation in mitochondria and chloroplasts is often inhibited by bacterial antibiotics (e.g., chloramphenicol). B) Like bacteria, mitochondria use N-formyl methionine and tRNAfmet in translation. C) mtDNA and cpDNA are usually organized into nucleosomes by histones. D) Like bacterial genes, mitochondrial and chloroplast genes do not have introns. E) Like bacterial genomes, mitochondrial and chloroplast genomes in all species consist of one circular DNA molecule.
During gastrulation in sea urchins, which forms first, the mouth or the anus?
What will be an ideal response?
After DNA replication is complete, each strand of the original molecule is bound to a new complementary strand. This process is known as
A. dispersive replication. B. disruptive replication. C. conservative replication. D. stabilizing replication. E. semiconservative replication.