Kidneys filter water and all solutes except ___
from the blood.
a. urea
b. potasium
c. proteins
d. chloride ions
e. monosaccharides
C
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Which statement best describes the limitations of using of humans in genetic studies of developmental biology?
A) The variation in human development between individuals is too large for genetic studies. B) It is impractical and unethical to conduct experimental manipulation or targeted mutagenesis of humans to examine the role of genes in development. C) It is impractical and unethical to examine and describe abnormalities of human development, such as birth defects. D) Genetic studies of human development are not necessary, because most problems in human development are due to environmental influences and not genetics.
What is the most efficient way to regulate gene expression from the perspective of cellular resources? What will be an ideal response?
Both glycoproteins and proteoglycans contribute to the carbohydrate layer on the surface of the cell. Which of the following is not true of glycoproteins?
(a) They can be secreted into the extracellular environment. (b) They have only one transmembrane domain. (c) They have long carbohydrate chains. (d) They are recognized by lectins.
A patient has a serious lung infection. A sputum sample was taken. The lab technician stated that the lab isolated a bacterium that did not have any peptidoglycan. You hypothesize that the identity of this microbe could possibly be __________.
A) Mycobacterium tuberculosis B) Mycoplasma pneumoniae C) Streptococcus pneumoniae D) Borrelia burgdorferi E) Haemophilus influenzae