The combination of DNA and its associated proteins is a(n) ____
a. gene
b. nucleolus
c. centriole
d. chromosome
e. allele
ANSWER: d
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How is climate change causing the emergence of zoonotic and vector-borne in new human populations?
What will be an ideal response?
Match the following items with the correct phrases.
_______1. _______________ are chemical mediators that enable cells to communicate with each other. _______2. When attached to the surface of particles or cells, ____________________ can facilitate phagocytosis. _______3. Proteins produced by one bacterial species that kill other bacterial species are known as ____________________. _______4. ____________________ are small, antiviral proteins that are produced by virus-infected cells. _______5. ____________________ attract leukocytes to sites where they are needed. a. bacteriocins b. chemotactic agents c. complement fragments d. cytokines e. interferons
In the future, it may be possible to slow muscle
loss from diseases and aging by inhibiting myostatin production. However, which of the following might be adversely affected?
a. ligaments b. tendons c. heart muscle d. actin production e. ATP production
Inserting a cloned gene for a certain plasma membrane transporter into crop plants could lead to
A. the evolution of nodule-formation on the crop plant. B. plants taking up enough minerals that they no longer need to photosynthesize. C. the ability of a plant to produce its own micronutrients. D. extra uptake of minerals that would fortify the crop for human consumption. E. elevated CO2 levels in the atmosphere.