All cells have a plasma membrane consisting of
What will be an ideal response?
a phospholipid bilayer with embedded proteins.
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Which of the following statements about the proximal convoluted tubule of the mammalian kidney is false?
A. It is impermeable to water. B. It has thick walls with microvilli. C. It is the first section of the renal tubule that filtrate encounters after passing into Bowman's space. D. It reabsorbs glucose and amino acids filtered by the glomerulus. E. The epithelial cells of the proximal convoluted tubule have abundant mitochondria to supply the energy for active reabsorption of solutes.
Why is innate host resistance a type of nonspecific immune response?
A. Innate resistance is nonspecific because it depends on the life experience of the individual, for example, receiving a vaccine or acquiring a disease due to a particular pathogen. B. Innate resistance is nonspecific because any foreign material, microorganisms, or antigens encountered by the host are targeted. C. Innate resistance is nonspecific because any type of immune response, such as inflammation, phagocytosis, or humoral immunity, is activated in the host by foreign material. D. Innate resistance is nonspecific because it is impossible to determine the specific degree by which any host will respond when foreign material or microorganisms are present.
Which molecule is a disaccharide?
A) Fructose B) Water C) Lactose D) Glucose
Dyes are often added to growth media to aid in the identification of microbes. What could be the purpose of a dye in this case?
A) to make the plate prettier B) to color key the type of plate being used C) to act as a growth enhancer D) to act as a pH indicator