The eukaryotic cell membrane is composed of ________.
A. phospholipids
B. sterols
C. sterols, proteins, and phospholipids
D. sterols and phospholipids only
E. proteins
Answer: C
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In analyzing data for crosses involving one gene, Mendel discovered that alleles are discrete entities, and that they are separated during formation of gametes. This was the basis of Mendel's law of ________
Fill in the blank with correct word.
A lot of energy is contained in each mole of glucose (686kcal), and if a cell were to release all that energy at once, the amount of heat produced would kill the cell. Which of the following statements is the most likely explanation for how a cell keeps itself from bursting into flames.
a) Glycolysis occurs in steps and each step does release heat, but not enough at one time to damage the cell. b) The cell has several protective organelles that absorb the excess energy released from the glucose and stores it in the form of fat cells, explaining why lots of sugar will make you gain weight. c) The cell extracts the energy from one mole of glucose all at once, but couples the reaction with an equally powerful endergonic reaction that uses up the excess energy. d) The cell extracts energy from one mole of glucose all at once, but the heat is used to maintain the cell's internal temperature. Why else would humans have such a warm body temperature? e) Both b) and d) are correct.
Nosocomial infections involve all the following except
A. are only transmitted by medical personnel. B. often involve the patient's urinary tract and surgical incisions. C. the patient's resident biota can be the infectious agent. D. Escherichia coli and staphylococci are common infectious agents. E. medical and surgical asepsis help lower their occurrence.
Which of the following contributes to protecting the eyes from microbial invasion?
A. tears contain lysozyme and salt. B. a mucus layer traps and removes microbes. C. tears mechanically flush particles from the eyes. D. tears contain lysozyme and salt and mechanically flush particles from the eyes. E. tears and mucus combine to trap microbes and remove them.