acid
What will be an ideal response?
a substance that donates hydrogen ions and therefore lowers pH
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Amino acids are characterized by ____
a. an amino group and a hydrogen bond b. a carboxyl group and a hydrogen bond c. two R groups d. an amino group, a carboxyl group, and an R group e. an amino group and a hydrochloric group
Which DNA damaging agent can transfer methyl groups (—CH3) to the nucleotide bases in DNA?
a. UV light b. Chemicals in tobacco smoke c. Ionizing radiation d. X-rays e. Free radicals
If a study of several pedigrees demonstrates that two
parents express a characteristic and none of their children express it, then the trait is controlled by a. a codominant gene. b. a simple dominant gene. c. a recessive gene. d. a sex-linked gene. e. No conclusion can be drawn.
How did mitochondria and chloroplasts arise in eukaryotic cells?
A) Via endosymbiosis, where mitochondria and chloroplasts were independent prokaryotic organisms that were engulfed by a larger cell B) Via binary fission, where bacteria divided to create mitochondria and chloroplasts C) Via the endomembrane system that engulfed mitochondria and chloroplasts D) Via the endomembrane system that enfolded in such a way as to create mitochondria and chloroplasts