During which phase of the eukaryotic cell cycle does DNA and chromosome replication occur?
A) The G1 phase of interphase B) Cytokinesis
C) The S phase of interphase D) The mitotic phase
C
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Which macromolecule did the majority of scientists favor as the "first" to be found in protobionts?
A. DNA. B. RNA. C. Amino acids. D. Proteins.
Which portion of a phospholipid is hydrophilic?
a. fatty acid tails b. glycerol heads c. The entire phospholipid is hydrophilic. d. None of the phospholipid is hydrophilic.
Which of the common molecules normally found in the body plays a role in the aging process,forming irreversible cross-linkages between proteins, and contributing to the stiffness and loss of elasticity we may experience with aging?
a) glucose b) phospholipids c) water d) NaCl e) ATP
Which major class of nutrients is primarily responsible for providing that full feeling after a meal?
A. carbohydrates B. nucleic acids C. fats D. water