Sister chromatids are joined together at a pinched spot called the _______
Fill in the blank(s) with the appropriate word(s).
Centromere
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The primary curves of the vertebral column are the
A) cervical, lumbar, and sacral. B) thoracic and coccygeal. C) cervical and thoracic. D) thoracic and sacral. E) dorsal and ventral.
What is the origin and physiological function of restriction endonucleases?
A) Bacteriophage produce them to gain resistance to antibiotics. B) Restriction endonucleases are required for DNA replication in yeast. C) Bacteria produce them to protect against viral invasion. D) Scientists invented them and synthesize them in labs.
________ and ________ groups are negatively charged functional groups of carbon, whereas the ________ group is a positively charged functional group
Fill in the blank with correct word.
The mitochondrial cristae are an adaptation that
A) permits the expansion of mitochondria as oxygen accumulates in the mitochondrial matrix. B) helps mitochondria divide during times of greatest cellular respiration. C) increases the space for more copies of the electron transport chain and ATP synthase complexes. D) carefully encloses the DNA housed within the mitochondrial matrix.