A pregnant woman was told by her doctor that while she is pregnant she might want to let someone else care for her cats so she would not contract toxoplasmosis through which mechanism?
a. Cats may have fleas that transmit toxoplasmosis
b. Scratches from infected claws
c. Exposure to infected cat feces
d. Infection from saliva
e. Infection from mice the cat may bring into the house
Answer: c. Exposure to infected cat feces
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Which collagen type is most rigid and is very abundant in bones and tendons?
A. Type I B. Type II C. Type III D. Type IV E. Type V
The difference between diffusion and passive transport is that during diffusion molecules move ________ and in passive transport they move ________
a. through passive transporters / across the lipid bilayer b. down concentration gradients / up concentration gradients c. through active transporters / through passive transporters d. across the lipid bilayer / through passive transporters
Amniocentesis and chorionic villi sampling are performed in order to
a. Discover the gender of the baby b. analyze the chromosomes c. check for limb abnormalities d. none of the above
Which of the following statements about genomic DNA libraries is false?
(a) The larger the size of the fragments used to make the library, the fewer colonies you will have to examine to find a clone that hybridizes to your probe. (b) The larger the size of the fragments used to make the library, the more difficult it will be to find your gene of interest once you have identified a clone that hybridizes to your probe. (c) The larger the genome of the organism from which a library is derived, the larger the fragments inserted into the vector will tend to be. (d) The smaller the gene you are seeking, the more likely it is that the gene will be found on a single clone.