Outline the two parts of the eukaryotic cell cycle and describe the three main checkpoints in cell cycle regulation. What will be an ideal response?
ANSWER: The eukaryotic cell cycle consists of two parts (1) interphase, which is divided into three
stages and makes up the major part of the cycle and (2) mitosis, which involves partitioning
replicated chromosomes to daughter cells, followed by division of the cytoplasm. The three
main checkpoints in cell cycle regulation are (1) the G1/S checkpoint where the cell either
proceeds to the S phase or enters the inactive G0 state; (2) the G2/M checkpoint where the
cell monitors completion of DNA synthesis and DNA damage; and (3) the M checkpoint is
where the interval of cell growth when DNA replication is completed.
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About 10-15% of African Americans in the US are carriers for ____, an autosomal recessive genetic disorder in which
a defective version of the hemoglobin protein is produced. a. Duchenne muscular dystrophy b. phenylketonuria c. achondroplasia d. sickle-cell anemia e. cystic fibrosis
passive transport requires metabolic energy
a. true b. false
How is a fall in blood pressure counteracted by the secretion of aldosterone? What will be an ideal response?
Appear stratified; nuclei of cells at different levels; cells near basement membrane are cuboidal
A. Pseudostratified columnar B. Simple columnar C. Simple cuboidal D. Simple squamous E. Stratified squamous F. Transitional